CN109839549B - Real-time monitoring method and device for working state of vehicle starting system - Google Patents
Real-time monitoring method and device for working state of vehicle starting system Download PDFInfo
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Abstract
本申请提供了一种整车启动系统工作状态的实时监测方法和装置，该方法和装置从整车用户角度出发，在车辆每一次启动过程中，启动系统工作状态实时监测系统首先获取整车启动过程中的启动参数实际值和发动机舱实际环境温度，然后根据发动机舱实际环境温度来确定当前发动机舱环境温度等级，进而确定当前整车启动过程中的启动参数标定值，然后通过比较整车启动过程中的启动参数实际值与启动参数标定值的大小，来判断整车启动系统工作状态是否正常，并当整车启动系统工作状态异常时，向用户发出启动异常警示。如此，用户在实际用车过程中能够实时获知车辆启动系统工作状态。
The present application provides a real-time monitoring method and device for the working state of a vehicle starting system. From the perspective of a vehicle user, the real-time monitoring system for the working state of the starting system first obtains the starting status of the vehicle during each starting process of the vehicle. The actual value of the startup parameters in the process and the actual ambient temperature of the engine compartment, and then determine the current engine compartment ambient temperature level according to the actual ambient temperature of the engine compartment, and then determine the startup parameter calibration value during the current vehicle startup process, and then start by comparing the entire vehicle. The actual value of the starting parameters and the calibration value of the starting parameters in the process are used to judge whether the working state of the vehicle starting system is normal, and when the working state of the vehicle starting system is abnormal, an abnormal starting warning is issued to the user. In this way, the user can know the working status of the vehicle starting system in real time during the actual use of the vehicle.
Description
Technical Field
The application relates to the technical field of vehicle electronics, in particular to a method and a device for monitoring the working state of a starting system of a whole vehicle in real time.
Background
The starting system of a modern traditional power vehicle (vehicle powered by gasoline and diesel engines) mainly comprises a starting type storage battery, a starter, an ignition system, a starting Control ECU (Electronic Control Unit), a starting relay, a wiring harness loop and the like. The starting system is used for converting the electric energy of the storage battery into mechanical energy through the starter and starting the engine to run. In general, the battery supplies the energy required during the starting process, and also supplies power to other electronic components in the vehicle electrical system. When the starter driving gear is engaged with the ring gear on the periphery of the engine flywheel, the electromagnetic torque generated when the starter rotates is transmitted to the crankshaft of the engine through the flywheel, so that the engine is started.
At present, the evaluation of the working state of a conventional power vehicle starting system is performed by a vehicle manufacturer in a vehicle design stage, and the working state of the vehicle starting system is evaluated by detecting the starting time of a vehicle and whether an engine can be dragged to the lowest rotating speed within a certain time under the conditions of-30 ℃ and normal temperature (25 ℃).
However, the existing method for evaluating the working state of the vehicle starting system is limited to off-line and external instruments, a user cannot know the working state of the vehicle starting system in real time, and cannot know the abnormal starting condition of the vehicle in advance, so that when a starting fault occurs, the vehicle usage of the user is affected, and the user experience is low.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for monitoring a working state of a vehicle starting system in real time, so that a user can know the working state of the vehicle starting system in real time, and user experience is improved.
In order to solve the technical problem, the following technical scheme is adopted in the application:
a real-time monitoring method for the working state of a finished automobile starting system comprises the following steps:
acquiring an actual value of a starting parameter and an actual environment temperature of an engine compartment in the starting process of the whole vehicle;
determining the current environment temperature grade of the engine compartment according to the preset relationship between the environment temperature of the engine compartment and the environment temperature grade of the engine compartment and the actual environment temperature of the engine compartment;
determining a vehicle starting parameter calibration value under the current engine compartment environment temperature grade according to a preset corresponding relation between the engine temperature grade and the starting parameter calibration value;
comparing the magnitude relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
judging whether the working state of the whole vehicle starting system is normal or not according to the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
and when the working state of the whole vehicle starting system is abnormal, performing starting abnormity warning.
Optionally, the method further comprises:
and when the working state of the finished automobile starting system is abnormal, diagnosing the fault reason causing the abnormal working state of the finished automobile starting system.
Optionally, after diagnosing a fault cause causing the abnormal working state of the vehicle starting system, the method further includes:
and prompting fault reason information and/or a fault solution causing the abnormal working state of the finished automobile starting system.
Optionally, the starting parameters include a battery discharge peak current, a battery instantaneous drop voltage and an engine dragging rotation speed; the judging whether the working state of the whole vehicle starting system is normal or not according to the size relationship between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter specifically comprises the following steps:
when the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine are respectively greater than the corresponding calibration values, determining that the working state of the starting system of the whole vehicle is normal;
and when at least one of the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine is not greater than the corresponding calibration value, determining that the working state of the whole vehicle starting system is abnormal.
Optionally, when the working state of the vehicle starting system is abnormal, diagnosing a fault cause causing the abnormal working state of the vehicle starting system, specifically including:
judging whether the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine or not;
if the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine, judging whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage or not, and if the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is the failure of the storage battery;
if the actual value of the instantaneous drop voltage of the storage battery is not less than the lowest limit voltage, determining that the fault cause causing the abnormal working state of the starting system of the whole vehicle is the fault cause of the starter or the failure of the ignition switch;
if the actual value of the dragging rotating speed of the engine is not less than the lowest limit rotating speed of the engine, judging whether the actual value of the dragging rotating speed of the engine is less than the calibrated value of the dragging rotating speed of the engine under the current environment temperature grade of the engine compartment, if so, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is caused because the electric quantity of the storage battery is very low, so that the starter can drag the engine but cannot start the vehicle; if not, judging whether the actual value of the discharge peak current of the storage battery is smaller than the calibrated value of the discharge peak current of the storage battery under the current environment temperature grade of the engine compartment and whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment, and if the actual value of the discharge peak current of the storage battery is smaller than the calibrated value of the discharge peak current of the storage battery under the current environment temperature grade of the engine compartment and the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is that the electric quantity of the storage battery is lower, so that the vehicle can be started but part of starting parameters is abnormal.
The utility model provides a real-time supervision device of whole car start-up system operating condition, includes:
the acquiring unit is used for acquiring the actual value of the starting parameter and the actual environment temperature of the engine compartment in the starting process of the whole vehicle;
the first determination unit is used for determining the current engine compartment environment temperature grade according to the preset relationship between the engine compartment environment temperature and the engine compartment environment temperature grade and the actual engine compartment environment temperature;
the second determination unit is used for determining the vehicle starting parameter calibration value under the current engine compartment environment temperature grade according to the corresponding relation between the preset engine temperature grade and the starting parameter calibration value;
the comparison unit is used for comparing the size relationship between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
the judging unit is used for judging whether the working state of the whole vehicle starting system is normal or not according to the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
and the warning unit is used for warning abnormal starting when the working state of the whole vehicle starting system is abnormal.
Optionally, the apparatus further comprises:
and the diagnosis unit is used for diagnosing the fault reason causing the abnormal working state of the finished automobile starting system when the working state of the finished automobile starting system is abnormal.
Optionally, the apparatus further comprises:
and the prompting unit is used for prompting fault reason information and/or a fault solution which cause the abnormal working state of the whole vehicle starting system.
Optionally, the starting parameters include a battery discharge peak current, a battery instantaneous drop voltage and an engine dragging rotation speed;
the judging unit specifically includes:
when the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine are respectively greater than the corresponding calibration values, determining that the working state of the starting system of the whole vehicle is normal;
and when at least one of the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine is not greater than the corresponding calibration value, determining that the working state of the whole vehicle starting system is abnormal.
Optionally, the diagnosis unit specifically includes:
the first judging subunit is used for judging whether the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine;
the second judgment subunit is used for judging whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage or not if the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine, and determining that the fault reason causing the abnormal working state of the starting system of the whole vehicle is caused by the failure of the storage battery if the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage;
the first determining subunit is used for determining that the fault cause causing the abnormal working state of the starting system of the whole vehicle is the fault cause of the starter or the failure of the ignition switch if the actual value of the instantaneous drop voltage of the storage battery is not less than the lowest limit voltage;
the third judging subunit is used for judging whether the actual value of the dragging rotating speed of the engine is smaller than the calibrated value of the dragging rotating speed of the engine under the current environmental temperature grade of the engine compartment if the actual value of the dragging rotating speed of the engine is not smaller than the lowest limit rotating speed of the engine, and if so, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is that the electric quantity of the storage battery is very low, so that the starter can drag the engine but cannot start the vehicle;
a fourth judging subunit, configured to, if the actual value of the engine dragging rotation speed is not less than the calibrated value of the engine dragging rotation speed at the current environmental temperature level of the engine compartment, judge whether the actual value of the battery discharging peak current is less than the calibrated value of the battery discharging peak current at the current environmental temperature level of the engine compartment and whether the actual value of the battery instantaneous drop voltage is less than the calibrated value of the battery instantaneous drop voltage at the current environmental temperature level of the engine compartment, if the actual value of the discharge peak current of the storage battery is smaller than the calibrated value of the discharge peak current of the storage battery under the current environment temperature grade of the engine compartment and the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment, determining that the failure cause of the abnormal working state of the starting system of the whole vehicle is caused by low electric quantity of the storage battery, so that the vehicle can start but partial starting parameters are abnormal.
Compared with the prior art, the method has the following beneficial effects:
the method for monitoring the working state of the whole vehicle starting system in real time starts from the perspective of a whole vehicle user, in each starting process of a vehicle, the real-time monitoring system for the working state of the starting system firstly acquires an actual starting parameter value and an actual environment temperature of an engine compartment in the whole vehicle starting process, then determines the current environment temperature grade of the engine compartment according to the actual environment temperature of the engine compartment, further determines a calibration value of the starting parameter in the current whole vehicle starting process, then judges whether the working state of the whole vehicle starting system is normal or not by comparing the actual starting parameter value and the calibration value of the starting parameter in the whole vehicle starting process, and sends a starting abnormity warning to the user when the working state of the whole vehicle starting system is abnormal. Therefore, the user can know the working state of the vehicle starting system in real time in the actual vehicle using process.
Moreover, the user can know the working state of the vehicle starting system in real time through the monitoring method, so that the user can know the abnormal starting condition of the vehicle in advance and then timely overhaul the vehicle, and therefore the possibility that the vehicle is used by the user due to the fact that the vehicle cannot be started is reduced, and the user experience is improved through the method.
Drawings
In order that the detailed description of the present application may be clearly understood, a brief description of the drawings that will be used when describing the detailed description of the present application will be provided. It is to be understood that these drawings are merely illustrative of some of the embodiments of the application.
Fig. 1 is a schematic block diagram of a real-time monitoring system for a vehicle starting system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a real-time monitoring system for a vehicle starting system according to an embodiment of the present application;
fig. 3 is a schematic flow chart of a real-time monitoring method for a vehicle starting system according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a specific example of a method for monitoring a working state of a vehicle starting system in real time according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a real-time monitoring device for a vehicle starting system according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a diagnosis unit provided in an embodiment of the present application.
Detailed Description
The following detailed description of specific embodiments of the present application is provided in conjunction with the accompanying drawings.
Because the starting parameter value when the vehicle is normally started has a close relation with the environmental temperature of the engine compartment, the corresponding starting parameter value when the vehicle is normally started is different according to different environmental temperatures of the engine compartment. Tests show that starting parameter values of a vehicle in normal starting can be approximately the same within a certain engine compartment environment temperature range. Therefore, different engine room environment temperature levels can be set, each engine room environment temperature level comprises a certain temperature range, and under different temperatures in the same engine room environment temperature level, the starting parameter values when the vehicle is normally started can be considered to be the same.
Based on this, be provided with engine compartment ambient temperature grade in the vehicle starts monitoring system, different engine compartment ambient temperature grades correspond different engine compartment ambient temperature scope and the starting parameter value when different vehicles normally start is the starting parameter calibration value.
As an example, the engine compartment environment temperature Level table may be as shown in Table 1, and there are 4 temperature levels, Level 0-Level 3, corresponding to 4 different temperature ranges.
TABLE 1 Engine compartment ambient temperature grade Table
| Temperature grade | Level 0 | Level 1 | Level 2 | Level 3 |
| Eng_Temp | -30℃～-15℃ | -15℃～0℃ | 0℃～15℃ | ﹥15℃ |
In addition, the vehicle starting system mainly includes a starting battery, a starter, an ignition system, a start Control ECU (Electronic Control Unit), a starting relay, a wire harness circuit, and the like. The start-up procedure is as follows: the storage battery provides energy required in the starting process and also supplies power for other electronic elements in the vehicle-mounted electrical system. When the starter driving gear is engaged with the ring gear on the periphery of the engine flywheel, the electromagnetic torque generated when the starter rotates is transmitted to the crankshaft of the engine through the flywheel, so that the engine is started. Based on the vehicle starting system and the starting process, the starting parameters for describing the working state of the whole vehicle starting system can comprise storage battery starting parameters and engine starting parameters. As an example, battery startup parameters include, but are not limited to, the following:
the discharge peak current of the storage battery, the instantaneous drop voltage, the current during dragging, the voltage during dragging,
the State Of Charge (Battery _ SOC; the State Of SOC means State Of Charge in chinese, also called the remaining capacity), and the State Of Health (Battery _ SOH, etc. parameters, SOH means Section Of Health in chinese, and Battery capacity, Health, performance State).
Engine start parameters include, but are not limited to, the following:
the drag rotational speed and the engine oil temperature.
The real-time monitoring principle of the working state of the vehicle starting system provided by the embodiment of the application is described below with reference to the accompanying drawings. Fig. 1 is a schematic block diagram of a real-time monitoring system for a vehicle starting system according to an embodiment of the present application. As shown in fig. 1, the real-time monitoring system comprises a battery 11, a starter 12, a battery sensor 13, an engine control module 14, a start real-time monitoring device 15, a warning device 16, a vehicle-mounted T-BOX 17 and the like.
The warning device 16 may be a Human Machine Interface (also called Human Machine Interface, abbreviated as HMI) display Interface, or may also be on a vehicle-mounted entertainment host, a background server, and/or a user mobile phone APP.
The onboard T-BOX is known collectively as Telematics Box. The onboard T-BOX 17 is part of a vehicle networking system. The Internet of vehicles system comprises four parts, namely a host, a vehicle-mounted T-BOX, a mobile phone APP and a background. The host is mainly used for video and audio entertainment and vehicle information display; the vehicle-mounted T-BOX is mainly used for communicating with a background system/mobile phone APP, and vehicle information display and control of the mobile phone APP are achieved. After a user sends a control command through a mobile phone end APP, a background CAN send a monitoring request command to a vehicle-mounted T-box, after the vehicle obtains the control command, a control message is sent through a CAN bus and control over the vehicle is achieved, an operation result is fed back to the mobile phone APP of the user, and only through the function, the user CAN be helped to remotely start the vehicle, open an air conditioner, adjust a seat to a proper position and the like.
The real-time monitoring principle of the working state of the whole vehicle starting system provided by the embodiment of the application is as follows:
the user sends out the control command who starts the vehicle through cell-phone APP, and then the vehicle carries out vehicle and starts the operation. In the process of starting the vehicle each time, the battery sensor 13 connected to the negative terminal of the battery 11 collects parameters representing the performance of the battery, such as the peak current of the battery discharge, the instantaneous drop voltage, the current during the dragging, the voltage during the dragging, the SOC information of the battery, the state of health of the battery and other parameters, and the battery sensor 13 sends the parameters representing the performance of the battery to the start real-time monitoring device 15 through the LIN bus; meanwhile, the engine control module 14 (in this embodiment, the engine control module 14 may be an engine controller or a vehicle body controller) controls the starting system to start the engine according to a normal operation mode, that is, the battery supplies power to the starter 12 to drive the engine flywheel to rotate, after a certain rotation speed requirement is reached, the pinion of the starter 12 is disengaged from the flywheel edge gear to start the engine, and the engine control module 14 sends the ambient temperature Eng _ Temp of the engine compartment and engine starting parameters such as the dragging rotation speed Eng _ RPM and the Oil temperature Oil _ Temp to the start real-time monitoring device 15 through the CAN bus. The start real-time monitoring device 15 monitors the working state of the whole vehicle starting system in real time according to the parameters (including the battery starting parameter and the engine starting parameter). And the start-up real-time monitoring device 15 can record the start-up parameters each time, and store the start-up parameters locally for self-learning and judgment of the trend change of the working state of the start-up system.
For the judgment result of the current starting, if the current and future pre-judgment starting systems work normally, the user is not prompted to be prompted on the interface of the warning device 16 actively, but the user can check the starting parameter values in the historical starting process of the starting system through the interface of the warning device 16.
If the starting parameters are normal or the vehicle can be started but some parameters are abnormal, the potential starting fault is hidden, a warning message is prompted to the user on the interface of the warning device 16, and related content is suggested to be overhauled.
If the engine cannot be dragged or the engine fails to be dragged, the user is prompted to 'check the vehicle if the vehicle starts the system abnormally' on the interface of the warning device 16.
In addition, when the user is prompted to "the vehicle start system works abnormally, please check the vehicle", the real-time monitoring device 15 is started to diagnose the fault reason causing the abnormal work of the vehicle start system. And may prompt the user for the diagnosed cause of the fault. The specific implementation mode can be as follows: after the vehicle starting system works abnormally and the prompt message of please checking the vehicle' continues for a period of time, for example, 5 seconds, the real-time monitoring device 15 is started to simultaneously prompt the detected problems to the user, and the prompt message is displayed on the vehicle-mounted entertainment host, the background server and/or the user mobile phone APP.
If the detection result of starting the real-time monitoring device 15 is that the electric quantity of the storage battery is very low, a user is prompted to' Warning: if the electric quantity of the storage battery is very low, the vehicle is started by pumping electricity; if the detection result of starting the real-time monitoring device 15 is that the starter fails or the ignition switch signal is not input to the starter end, the user will be prompted to' Warning: please check starter and ignition switch "; if the detection result of starting the real-time monitoring device 15 is that the storage battery is damaged, a user is prompted to' Warning: please replace the battery ".
The following describes a specific implementation manner of the real-time monitoring device 15 for the working state of the starting system of the whole vehicle according to the starting parameters with reference to the drawings.
First, a structure of a real-time monitoring system for a working state of a vehicle starting system adopted in the embodiment of the present application is introduced. Fig. 2 is a schematic structural diagram of a real-time monitoring system for a vehicle starting system according to an embodiment of the present application. As shown in fig. 2, the real-time monitoring system may include:
the system comprises a storage battery sensor 13, an engine control module 14, a start real-time monitoring device 15 and a warning device 16.
In each starting process of the whole vehicle, the storage battery sensor 13 collects storage battery starting parameters, and as an example, the storage battery starting parameters include, but are not limited to, the following: the storage battery discharge peak current, the instantaneous drop voltage, the current during dragging, the voltage during dragging, the storage battery state of charge and the storage battery state of health.
The engine control module 14 obtains an engine compartment ambient temperature during vehicle start and engine start parameters, which may include, for example, a motoring speed and an oil temperature. The engine control module 14 transmits the acquired engine compartment ambient temperature and the acquired engine starting parameters in the starting process of the whole vehicle to the starting real-time monitoring device 15.
Starting a real-time monitoring device 15 to determine the current environment temperature grade of the engine compartment according to the preset relationship between the environment temperature of the engine compartment and the environment temperature grade of the engine compartment and the actual environment temperature of the engine compartment; determining a vehicle starting parameter calibration value under the current engine compartment environment temperature grade according to a preset corresponding relation between the engine temperature grade and the starting parameter calibration value; comparing the magnitude relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter; judging whether the working state of the whole vehicle starting system is normal or not according to the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter; when the working state of the vehicle starting system is abnormal, a starting abnormality warning is sent to the warning device 16.
The warning device 16 displays the received abnormal starting warning, so that a user can sense the working state of the starting system of the whole vehicle in the starting process of the whole vehicle each time.
In addition, in a whole vehicle starting system, the fault causes of the abnormal starting of the whole vehicle are various, for example, the storage battery is seriously insufficient, the static current of the whole vehicle is too large due to the fact that the whole vehicle has an unknown wake-up source, the starter fails, an ignition switch signal and the like. Because the user is not a special vehicle technician, the user is difficult to find the cause of the failure quickly and accurately. Therefore, in order to enable the user to quickly and accurately know what the operating state of the starting system is abnormal, in the embodiment of the present application, the starting real-time monitoring device 15 may be further configured to diagnose the fault cause of the abnormal operating state of the starting system of the entire vehicle when the operating state of the starting system of the entire vehicle is abnormal. And after diagnosing the fault cause causing the abnormal working state of the whole vehicle starting system, prompting the fault cause information and/or the fault solution causing the abnormal working state of the whole vehicle starting system to a user through the warning device 16.
Based on the real-time monitoring system for the working state of the whole vehicle starting system provided by the embodiment, the embodiment of the application further provides a specific implementation mode of the real-time monitoring method for the working state of the whole vehicle starting system.
Fig. 3 is a schematic flow chart of a method for monitoring a working state of a vehicle starting system in real time according to an embodiment of the present application. As shown in fig. 3, the real-time monitoring method includes:
s301, acquiring the actual value of the starting parameter and the actual environment temperature of the engine compartment in the starting process of the whole vehicle.
As an example, the starting parameters during the starting process of the whole vehicle can comprise a storage battery starting parameter and an engine starting parameter.
Battery startup parameters include, but are not limited to, the following: the method comprises the steps Of storage Battery discharging peak current, instantaneous drop voltage, current during dragging, voltage during dragging, storage Battery State Of Charge (Battery _ SOC; the full name Of SOC is State Of Charge, Chinese means State Of Charge and also called residual capacity), storage Battery Health State (parameters such as Battery _ SOH, the full name Of SOH is Section Of Health, and Chinese means storage Battery capacity, Health degree and performance State).
Engine start parameters include, but are not limited to, the following: the drag rotational speed and the engine oil temperature.
S302, determining the current engine compartment environment temperature grade according to the preset relation between the engine compartment environment temperature and the engine compartment environment temperature grade and the actual engine compartment environment temperature.
As an example, the relationship between the engine compartment ambient temperature and the engine compartment ambient temperature level set in advance may be as shown in table 1 above. And determining that the current engine compartment environment temperature Level is Level2 when the obtained actual engine compartment environment temperature is 10 ℃.
And S303, determining the vehicle starting parameter calibration value under the current engine compartment environment temperature grade according to the preset corresponding relation between the engine temperature grade and the starting parameter calibration value.
S304, comparing the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter.
S305, judging whether the working state of the whole vehicle starting system is normal or not according to the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter.
The method and the device for judging the working state of the starting system are characterized in that a starting parameter index for evaluating whether the working state of the starting system is normal or not is preset. The numerical value of the starting parameter index can reflect whether the working state of the starting system is normal or not. And the numerical value of the starting parameter index reflecting the normal working state of the starting system is the vehicle starting parameter calibration value.
Therefore, whether the working state of the whole vehicle starting system is normal or not can be judged according to the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter.
And S306, when the working state of the whole vehicle starting system is abnormal, performing starting abnormity warning.
In order to prompt a user that the starting system works abnormally, the user can conveniently overhaul the vehicle in advance, the vehicle is prevented from being influenced, and when the working state of the starting system of the whole vehicle is abnormal, abnormal starting warning is given.
As an example, the start real-time monitoring device 15 may send a start abnormality warning instruction to the warning device 16, and display the abnormality warning information through the warning device 16, so as to implement the function of starting the abnormality warning. Therefore, the visual real-time monitoring of the working state of the starting system can be realized.
It should be noted that, in the embodiment of the present application, the warning of the abnormal starting may be performed only when the working state of the vehicle starting system is abnormal and the user needs to be reminded. When the working state of the whole vehicle starting system is normal, no warning can be given to save resources. Of course, as an extension of the embodiment of the present application, the starting state may also be prompted when the working state of the vehicle starting system is normal, and at this time, the starting state is prompted to be normal, so that the user can use the vehicle with ease.
In addition, in order to enable a user to quickly and accurately know what reason causes the abnormal working state of the starting system, the provided real-time monitoring method for the working state of the starting system of the whole vehicle can further comprise the following steps:
s307, when the working state of the finished automobile starting system is abnormal, diagnosing a fault reason causing the abnormal working state of the finished automobile starting system.
In order to remind a user of maintaining or replacing parts in time, improve the scientific and technological sense of the vehicle and reduce the risk of starting faults when starting the vehicle in the future, the real-time monitoring method for the working state of the whole vehicle starting system can further comprise the following steps:
s308, the control warning device 16 prompts fault reason information and/or fault solutions which cause the abnormal working state of the starting system of the whole vehicle.
When the diagnosed fault cause of the real-time monitoring device 15 is started, the real-time monitoring device 15 is started to send fault cause information and/or a control instruction of a fault solution prompting that the working state of the starting system of the whole vehicle is abnormal to the warning device 16, and the warning device 16 sends warning information to a user according to the control instruction.
As an example, if the cause of the diagnosed fault that starts the real-time monitoring device 15 is that the battery level is very low, the warning device 16 will prompt the user with warning information: "Warning: if the electric quantity of the storage battery is very low, the vehicle is started by pumping electricity;
if the cause of the diagnosed fault of the start-up real-time monitoring device 15 is a starter fault or an ignition switch signal is not input to the starter end, the warning device 16 will prompt a user to give a warning message: "Warning: please check starter and ignition switch ";
if the cause of the failure diagnosed by the real-time monitoring device 15 is a battery damage, the warning device 16 will prompt the user with warning information: "Warning: please replace the battery ".
In addition, in the above embodiment, in the monitoring process of the working state of the vehicle starting system each time, the starting real-time monitoring device 15 may also record the starting parameters each time, and store the starting parameters locally for self-learning and judgment of the trend change of the working state of the starting system. In addition, because the starting parameters are stored locally, a user can also check the starting parameter values in the historical starting process of the starting system according to the requirement.
The above is a specific implementation manner of the real-time monitoring method for the working state of the whole vehicle starting system provided by the embodiment of the application. In the specific embodiment, from the perspective of a finished automobile user, in each starting process of the automobile, the real-time monitoring system for the working state of the starting system firstly acquires an actual starting parameter value and an actual engine compartment environment temperature in the starting process of the finished automobile, then determines the current engine compartment environment temperature grade according to the actual engine compartment environment temperature, further determines a starting parameter calibration value in the starting process of the finished automobile, then judges whether the working state of the finished automobile starting system is normal or not by comparing the actual starting parameter value and the starting parameter calibration value in the starting process of the finished automobile, and sends a starting abnormality warning to the user when the working state of the finished automobile starting system is abnormal. Therefore, the user can monitor the starting parameters of the starting system in real time in the starting process of the whole vehicle, and can know the working state of the vehicle starting system in real time in the actual vehicle using process.
Moreover, the user can know the working state of the vehicle starting system in real time through the monitoring method, so that the user can know the abnormal starting condition of the vehicle in advance and then timely overhaul the vehicle, and therefore the possibility that the vehicle is used by the user due to the fact that the vehicle cannot be started is reduced, and the user experience is improved through the method.
In addition, in the embodiment of the application, when the working state of the starting system is abnormal, the starting real-time monitoring device can automatically diagnose the fault reason causing the abnormal working state of the starting system and prompt the fault reason to the user, so that the potential problem of the starting system can be prompted to the user by the mode of automatically diagnosing the failure reason of the starting system, the user can overhaul the vehicle in advance, and the breakdown is avoided.
In order to more clearly understand a specific implementation of the method for monitoring the working state of the vehicle starting system provided by the present application in real time, a specific example of the method for monitoring the working state of the vehicle starting system in real time is described below with an example of a battery discharge peak current, a battery instantaneous drop voltage, and an engine dragging rotation speed as starting parameters.
In a specific example of describing a real-time monitoring method for the working state of a starting system of a whole vehicle by taking the discharging peak current of a storage battery, the instantaneous drop voltage of the storage battery and the dragging rotating speed of an engine as starting parameters, the following concepts are used: the method comprises the steps of storing a storage battery discharge peak current actual value and a calibration value, a storage battery instantaneous drop voltage actual value and a calibration value, an engine dragging rotating speed actual value and a calibration value, an engine minimum limit rotating speed and a storage battery minimum limit voltage.
If the rotation speed of the engine is lower than the lowest limit rotation speed of the engine, the engine is basically out of operation.
When the voltage of the storage battery is lower than the lowest limit voltage of the storage battery, the fact that the storage battery is basically scrapped is indicated.
For convenience of description, different concepts are denoted by different symbols, specifically as follows:
battery _ Discard _ Current: actual value of discharge peak current of the storage battery;
max _ Discharge _ Current: calibrating a discharge peak current of the storage battery;
battery _ Vol: the actual value of the instantaneous drop voltage of the storage battery;
min _ Vol: calibrating the instantaneous drop voltage of the storage battery;
eng _ RPM: actual value of engine dragging speed;
min _ RPM: calibrating the dragging rotating speed of the engine;
lim _ RPM: the lowest limit rotation speed of the engine;
lim _ Vol: the lowest limit voltage of the storage battery.
Eng _ Temp: the actual ambient temperature of the engine compartment.
Fig. 4 is a schematic flowchart of a specific example of a method for monitoring a working state of a vehicle starting system in real time according to an embodiment of the present application. As shown in fig. 4, this specific example includes the steps of:
s401, acquiring an actual value of a discharging peak current of a storage battery, an actual value of an instantaneous drop voltage of the storage battery, an actual value of a dragging rotating speed of an engine and an actual environment temperature of an engine compartment in the starting process of the whole vehicle.
The step may specifically be: in the starting process of the whole vehicle, the real-time monitoring device 15 is started to acquire Battery _ Discard _ Current and Battery _ Vol which are acquired by the storage Battery sensor 13. In addition, the start real-time monitoring device 15 acquires Eng _ RPM and Eng _ Temp from the engine control module 14.
S402, determining the current engine compartment environment temperature grade according to the preset relation between the engine compartment environment temperature and the engine compartment environment temperature grade and the actual engine compartment environment temperature.
As an example, the relationship between the engine compartment ambient temperature and the engine compartment ambient temperature level set in advance may be as shown in table 1 above. And determining that the current engine compartment environment temperature Level is Level2 when the obtained actual engine compartment environment temperature is 10 ℃.
And S403, determining a storage battery discharging peak current calibration value, an instantaneous drop voltage calibration value and a dragging rotation speed calibration value under the current engine compartment environment temperature grade according to the preset corresponding relation between the engine temperature grade and the starting parameter calibration value.
And determining Max _ Discharge _ Current, Min _ Vol and Min _ RPM under the Current engine compartment environment temperature grade according to a preset corresponding relation between the engine temperature grade and a starting parameter calibration value.
And S404, comparing the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage and the actual value of the dragging rotating speed with the corresponding calibration values respectively.
The method comprises the following specific steps: the size of Battery _ Discard _ Current and Max _ Discharge _ Current, the size of Battery _ Vol and Min _ Vol, and the size of Eng _ RPM and Min _ RPM are compared, respectively.
When pattern _ discard _ Current > Max _ Discharge _ Current, pattern _ Vol > Min _ Vol, and Eng _ RPM > Min _ RPM, performing step S405; when at least one of the three size relationships Battery _ discard _ Current > Max _ Discharge _ Current, Battery _ Vol > Min _ Vol, and Eng _ RPM > Min _ RPM is not satisfied, step S406 is performed.
S405, determining that the working state of the whole vehicle starting system is normal.
And S406, determining that the working state of the whole vehicle starting system is abnormal.
And S407, controlling the warning device 16 to send warning information that the working state of the vehicle starting system is abnormal.
It should be noted that, in the embodiment of the present application, when it is monitored that the working state of the system is normal when the entire vehicle is started, the working state normal prompt may not be sent, and the user may use the vehicle normally.
In order to prompt the user that the starting system works abnormally, after the working state of the starting system of the whole vehicle is determined to be abnormal, the starting real-time monitoring device 15 can control the warning device 16 to send warning information that the working state of the starting system of the whole vehicle is abnormal. The warning information may be, for example: "the vehicle starts the system work abnormally, please check the vehicle".
The real-time monitoring of the working state of the whole vehicle starting system can be realized through the steps S401 to S407. Therefore, the user can know the working state of the vehicle starting system in real time.
Moreover, the user can know the working state of the vehicle starting system in real time through the monitoring method, so that the user can know the abnormal starting condition of the vehicle in advance and then timely overhaul the vehicle, and therefore the possibility that the vehicle is used by the user due to the fact that the vehicle cannot be started is reduced, and the user experience is improved through the method.
In addition, in order to diagnose the fault reason of the abnormal operation of the vehicle starting system, the real-time starting monitoring device 15 may also diagnose the fault reason causing the abnormal operation of the vehicle starting system when monitoring the abnormal operation of the vehicle starting system. As such, after step S407, the following steps may be further included:
and S408, judging whether the actual value of the engine dragging rotating speed is smaller than the lowest limit rotating speed of the engine, if so, executing a step S409, and if not, executing a step S413.
If the actual value of the engine dragging rotating speed is smaller than the lowest limit rotating speed of the engine, the engine can be indicated to be basically incapable of running when the rotating speed of the engine is lower than the lowest limit rotating speed of the engine, and therefore, in this case, the starter can be determined to be incapable of dragging the engine to run.
In the starting process of the whole vehicle, the storage battery provides energy required in the starting process, and if the storage battery is scrapped, the storage battery cannot provide the energy required in the starting process, so that the engine cannot be dragged to operate. And the instantaneous drop voltage of the storage battery can represent whether the state of the storage battery is good, so the step S409 is executed in order to determine the fault reason that the starter cannot drive the engine to operate.
And S409, judging whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage, if so, executing steps S410 to S411, and if not, executing steps S412 to S411.
And S410, determining that the failure reason is failure of the storage battery and the storage battery needs to be replaced.
S411, the control warning device 16 sends out warning information of failure reasons and/or solutions.
Note that the warning information given by the warning device 16 is different for different causes of failure. Specifically, when it is determined that the cause of the failure is a failure of the storage battery and the storage battery needs to be replaced, the content of the warning message may be: the battery fails and needs to be replaced.
When the fault reason is determined to be the starter fault or the ignition switch failure, the content of the warning message may be: turning: please check the starter and ignition switch.
When it is determined that the failure cause is that the battery level is so low that the starter can pull the engine but cannot start the vehicle, the content of the warning message may be: turning: if the battery is very low, the vehicle is started by pumping electricity.
And S412, determining that the fault reason is the fault of the starter or the failure of the ignition switch, and checking/replacing the starter or checking the ignition switch/wiring harness.
And S413, judging whether the actual value of the engine dragging rotating speed is smaller than the engine dragging rotating speed calibration value under the current engine compartment environment temperature level, if so, executing steps S414 and S411, and if not, executing step S415.
Eng_RPM<Min_RPM
And S414, determining that the starter can drag the engine but cannot start the vehicle, and determining that the starting fails because the storage battery has very low electric quantity, so that the starter can drag the engine but cannot start the vehicle.
S415, judging whether the actual value of the discharging peak current of the storage battery is smaller than the calibrated value of the discharging peak current of the storage battery under the current environment temperature grade of the engine compartment or not and whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment or not, if so, executing a step S416, and if not, executing a step S405.
Battery_Discarge_Current<Max_Discharge_Current
Battery_Vol<Min_Vol
And S416, determining that the vehicle can be started but the partial starting parameter is abnormal, wherein the fault reason is that the storage battery is low in charge, so that the vehicle can be started but the partial starting parameter is abnormal. In this case, the abnormal starting operation state is not serious, and the vehicle needs to be started immediately to supply power to the storage battery, and the warning device does not need to be controlled to give out warning information.
The above is a specific implementation manner of the method for monitoring the working state of the whole vehicle starting system in real time, which corresponds to the example of the starting parameters, namely the discharging peak current of the storage battery, the instantaneous drop voltage of the storage battery and the dragging rotating speed of the engine.
In the specific implementation mode, the real-time monitoring of the whole vehicle starting system can be realized, the health state of the starting system can be analyzed and predicted, the failure reason of the starting system is diagnosed, and the failure existing in the starting system is prompted to a user, so that the user can overhaul the vehicle in advance, and the breakdown is avoided. Through this embodiment, can improve the science and technology of vehicle and feel.
In addition, in the specific implementation mode, the detection system can better interact with the user, and the satisfaction degree of the user is favorably improved.
Based on the specific implementation manner of the method for monitoring the working state of the whole vehicle starting system provided by the embodiment, the embodiment of the application also provides a specific implementation manner of a device for monitoring the working state of the whole vehicle starting system. See in particular the examples below.
Fig. 5 is a schematic structural diagram of a device for monitoring a working state of a vehicle starting system according to an embodiment of the present application. As shown in fig. 5, the monitoring device includes:
the acquiring unit 51 is used for acquiring the actual value of the starting parameter and the actual environment temperature of the engine compartment in the starting process of the whole vehicle;
a first determination unit 52, configured to determine a current engine compartment ambient temperature level according to a preset relationship between the engine compartment ambient temperature and the engine compartment ambient temperature level and the actual engine compartment ambient temperature;
a second determining unit 53, configured to determine a vehicle starting parameter calibration value at the current engine compartment environment temperature level according to a preset correspondence between an engine temperature level and the starting parameter calibration value;
a comparison unit 54, configured to compare a magnitude relationship between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
the judging unit 55 is configured to judge whether the working state of the vehicle starting system is normal according to the magnitude relationship between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
and the warning unit 56 is used for warning abnormal starting when the working state of the whole vehicle starting system is abnormal.
Through the units, the monitoring device for the working state of the whole vehicle starting system can realize real-time monitoring of the working state of the starting system, and a user can acquire the working state of the starting system in real time.
In order to obtain the reason for the failure of the starting system, as a specific embodiment of the present application, the monitoring device may further include:
and the diagnosis unit 57 is configured to diagnose a fault cause causing the abnormal working state of the vehicle starting system when the working state of the vehicle starting system is abnormal.
In addition, in order to enable the user to obtain the diagnosed fault reason in time, as another specific embodiment of the present application, the monitoring device may further include:
and the prompting unit 58 is used for prompting fault reason information and/or fault solutions causing the abnormal working state of the starting system of the whole vehicle.
In the embodiment of the application, the starting parameters may include a battery discharging peak current, a battery instantaneous drop voltage and an engine dragging rotating speed. When the starting parameters are the battery discharging peak current, the battery instantaneous drop voltage and the engine dragging speed, the determining unit 55 may specifically be:
when the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine are respectively greater than the corresponding calibration values, determining that the working state of the starting system of the whole vehicle is normal;
and when at least one of the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine is not greater than the corresponding calibration value, determining that the working state of the whole vehicle starting system is abnormal.
In addition, in order to diagnose a specific fault cause causing the failure of the starting system, as a specific embodiment of the present application, as shown in fig. 6, the diagnosis unit 57 may further specifically be:
a first judging subunit 571, configured to judge whether the actual value of the engine dragging rotation speed is smaller than the lowest limit rotation speed of the engine;
a second determining subunit 572, configured to determine, if the actual value of the engine dragging rotational speed is smaller than the lowest limit rotational speed of the engine, whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage, and if the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage, determine that a failure cause that the working state of the vehicle starting system is abnormal is failure of the storage battery;
the first determining subunit 573 is configured to determine that the fault cause causing the abnormal working state of the vehicle starting system is the starter fault cause or the ignition switch fails if the actual value of the instantaneous drop voltage of the storage battery is not less than the lowest limit voltage;
a third determining subunit 574, configured to determine, if the actual value of the engine dragging rotation speed is not less than the minimum limit rotation speed of the engine, whether the actual value of the engine dragging rotation speed is less than a calibrated value of the engine dragging rotation speed at the current engine compartment ambient temperature level, and if so, determine that a fault cause that the working state of the vehicle starting system is abnormal is that the electric quantity of the storage battery is very low, so that the starter can drag the engine but cannot start the vehicle;
a fourth judging subunit 575, configured to, if the actual value of the engine dragging rotational speed is not less than the calibrated value of the engine dragging rotational speed at the current environmental temperature level of the engine compartment, judge whether the actual value of the battery discharging peak current is less than the calibrated value of the battery discharging peak current at the current environmental temperature level of the engine compartment and whether the actual value of the battery instantaneous drop voltage is less than the calibrated value of the battery instantaneous drop voltage at the current environmental temperature level of the engine compartment, if the actual value of the discharge peak current of the storage battery is smaller than the calibrated value of the discharge peak current of the storage battery under the current environment temperature grade of the engine compartment and the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment, determining that the failure cause of the abnormal working state of the starting system of the whole vehicle is caused by low electric quantity of the storage battery, so that the vehicle can start but partial starting parameters are abnormal.
The foregoing is a detailed description of the present application.
Claims (6)
1. A real-time monitoring method for the working state of a finished automobile starting system is characterized by comprising the following steps:
acquiring actual values of starting parameters and actual environment temperature of an engine compartment in the starting process of the whole vehicle, wherein the starting parameters comprise storage battery discharge peak current, storage battery instantaneous drop voltage and engine dragging rotating speed;
determining the current environment temperature grade of the engine compartment according to the preset relationship between the environment temperature of the engine compartment and the environment temperature grade of the engine compartment and the actual environment temperature of the engine compartment;
determining a vehicle starting parameter calibration value under the current engine compartment environment temperature grade according to a preset corresponding relation between the engine temperature grade and the starting parameter calibration value;
comparing the magnitude relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
judging whether the working state of the whole vehicle starting system is normal or not according to the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
when the working state of the whole vehicle starting system is abnormal, performing starting abnormity warning;
when the working state of the finished automobile starting system is abnormal, diagnosing a fault reason causing the abnormal working state of the finished automobile starting system;
when the working state of the whole vehicle starting system is abnormal, the diagnosis causes the abnormal fault reason of the working state of the whole vehicle starting system, and the method specifically comprises the following steps:
judging whether the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine or not;
if the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine, judging whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage or not, and if the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is the failure of the storage battery;
if the actual value of the instantaneous drop voltage of the storage battery is not less than the lowest limit voltage, determining that the fault cause causing the abnormal working state of the starting system of the whole vehicle is the fault cause of the starter or the failure of the ignition switch;
if the actual value of the dragging rotating speed of the engine is not less than the lowest limit rotating speed of the engine, judging whether the actual value of the dragging rotating speed of the engine is less than the calibrated value of the dragging rotating speed of the engine under the current environment temperature grade of the engine compartment, if so, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is caused because the electric quantity of the storage battery is very low, so that the starter can drag the engine but cannot start the vehicle; if not, judging whether the actual value of the discharge peak current of the storage battery is smaller than the calibrated value of the discharge peak current of the storage battery under the current environment temperature grade of the engine compartment and whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment, and if the actual value of the discharge peak current of the storage battery is smaller than the calibrated value of the discharge peak current of the storage battery under the current environment temperature grade of the engine compartment and the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is that the electric quantity of the storage battery is lower, so that the vehicle can be started but part of starting parameters is abnormal.
2. The method according to claim 1, wherein after diagnosing the fault cause causing the abnormal working state of the starting system of the whole vehicle, the method further comprises the following steps:
and prompting fault reason information and/or a fault solution causing the abnormal working state of the finished automobile starting system.
3. The method according to any one of claims 1-2, wherein the determining whether the working state of the vehicle starting system is normal according to the magnitude relationship between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter specifically comprises:
when the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine are respectively greater than the corresponding calibration values, determining that the working state of the starting system of the whole vehicle is normal;
and when at least one of the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine is not greater than the corresponding calibration value, determining that the working state of the whole vehicle starting system is abnormal.
4. The utility model provides a real-time supervision device of whole car starting system operating condition which characterized in that includes:
the system comprises an acquisition unit, a storage battery control unit and a control unit, wherein the acquisition unit is used for acquiring an actual value of a starting parameter and an actual environment temperature of an engine compartment in the starting process of the whole vehicle, and the starting parameter comprises a storage battery discharge peak current, a storage battery instantaneous drop voltage and an engine dragging rotating speed;
the first determination unit is used for determining the current engine compartment environment temperature grade according to the preset relationship between the engine compartment environment temperature and the engine compartment environment temperature grade and the actual engine compartment environment temperature;
the second determination unit is used for determining the vehicle starting parameter calibration value under the current engine compartment environment temperature grade according to the corresponding relation between the preset engine temperature grade and the starting parameter calibration value;
the comparison unit is used for comparing the size relationship between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
the judging unit is used for judging whether the working state of the whole vehicle starting system is normal or not according to the size relation between the actual value of the starting parameter and the calibrated value of the vehicle starting parameter;
the warning unit is used for warning abnormal starting when the working state of the vehicle starting system is abnormal;
the diagnosis unit is used for diagnosing the fault reason causing the abnormal working state of the finished automobile starting system when the working state of the finished automobile starting system is abnormal;
the diagnosis unit specifically comprises:
the first judging subunit is used for judging whether the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine;
the second judgment subunit is used for judging whether the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage or not if the actual value of the dragging rotating speed of the engine is smaller than the lowest limit rotating speed of the engine, and determining that the fault reason causing the abnormal working state of the starting system of the whole vehicle is caused by the failure of the storage battery if the actual value of the instantaneous drop voltage of the storage battery is smaller than the lowest limit voltage;
the first determining subunit is used for determining that the fault cause causing the abnormal working state of the starting system of the whole vehicle is the fault cause of the starter or the failure of the ignition switch if the actual value of the instantaneous drop voltage of the storage battery is not less than the lowest limit voltage;
the third judging subunit is used for judging whether the actual value of the dragging rotating speed of the engine is smaller than the calibrated value of the dragging rotating speed of the engine under the current environmental temperature grade of the engine compartment if the actual value of the dragging rotating speed of the engine is not smaller than the lowest limit rotating speed of the engine, and if so, determining that the fault cause of the abnormal working state of the starting system of the whole vehicle is that the electric quantity of the storage battery is very low, so that the starter can drag the engine but cannot start the vehicle;
a fourth judging subunit, configured to, if the actual value of the engine dragging rotation speed is not less than the calibrated value of the engine dragging rotation speed at the current environmental temperature level of the engine compartment, judge whether the actual value of the battery discharging peak current is less than the calibrated value of the battery discharging peak current at the current environmental temperature level of the engine compartment and whether the actual value of the battery instantaneous drop voltage is less than the calibrated value of the battery instantaneous drop voltage at the current environmental temperature level of the engine compartment, if the actual value of the discharge peak current of the storage battery is smaller than the calibrated value of the discharge peak current of the storage battery under the current environment temperature grade of the engine compartment and the actual value of the instantaneous drop voltage of the storage battery is smaller than the calibrated value of the instantaneous drop voltage of the storage battery under the current environment temperature grade of the engine compartment, determining that the failure cause of the abnormal working state of the starting system of the whole vehicle is caused by low electric quantity of the storage battery, so that the vehicle can start but partial starting parameters are abnormal.
5. The apparatus of claim 4, further comprising:
and the prompting unit is used for prompting fault reason information and/or a fault solution which cause the abnormal working state of the whole vehicle starting system.
6. The apparatus according to any one of claims 4 to 5,
the judging unit specifically includes:
when the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine are respectively greater than the corresponding calibration values, determining that the working state of the starting system of the whole vehicle is normal;
and when at least one of the actual value of the discharge peak current of the storage battery, the actual value of the instantaneous drop voltage of the storage battery and the actual value of the dragging rotating speed of the engine is not greater than the corresponding calibration value, determining that the working state of the whole vehicle starting system is abnormal.
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| CN111142499B (en) * | 2019-12-19 | 2021-11-30 | 大众问问(北京)信息科技有限公司 | Vehicle fault detection method, device and equipment |
| CN112782974B (en) * | 2020-11-02 | 2023-01-10 | 联合汽车电子有限公司 | Control parameter calibration method |
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