CN109050348B - Control method and system for simulating flameout condition of engine of fuel vehicle of electric vehicle and electric vehicle - Google Patents
Control method and system for simulating flameout condition of engine of fuel vehicle of electric vehicle and electric vehicle Download PDFInfo
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- CN109050348B CN109050348B CN201810936879.9A CN201810936879A CN109050348B CN 109050348 B CN109050348 B CN 109050348B CN 201810936879 A CN201810936879 A CN 201810936879A CN 109050348 B CN109050348 B CN 109050348B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/48—Drive Train control parameters related to transmissions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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Abstract
本发明涉及了一种电动汽车模拟燃油车发动机熄火工况的控制方法、系统和电动汽车，其中该控制方法包括手动挡变速换挡工作状态模拟步骤、发动机转速模拟步骤、数据获取步骤、换挡判断步骤、车速判断步骤、计时步骤和熄火信号发送步骤，通过获取电动汽车的当前车速、发动机模拟转速和当前挡位值并与相应的阈值进行判断比较后根据判断比较结果进入计时以及再根据计时判断后发出熄火信号的一系列特定步骤最终实现电动汽车模拟燃油车发动机的熄火工况，使电动汽车能够真实可靠的模拟出驾校学习或考试过程中传统燃油车因驾驶者操作不当导致燃油车熄火的各种情况，使得电动汽车与传统燃油车的操作方法和操作结果保持一致，使电动汽车在驾校场地能够应用。
The invention relates to a control method, a system and an electric vehicle for simulating a flameout condition of an engine of a fuel vehicle for an electric vehicle, wherein the control method comprises a step of simulating a working state of a manual gear shift, a step of simulating an engine speed, a step of data acquisition, and a step of shifting gears. The judging step, the speed judging step, the timing step and the flameout signal sending step are obtained by obtaining the current speed of the electric vehicle, the simulated engine speed and the current gear value and judging and comparing with the corresponding thresholds. A series of specific steps to send out the flameout signal after judgment finally realize the electric vehicle to simulate the flameout condition of the engine of the fuel vehicle, so that the electric vehicle can truly and reliably simulate the fuel vehicle flameout caused by the improper operation of the traditional fuel vehicle during the driving school learning or test process. Various situations make electric vehicles consistent with the operation methods and results of traditional fuel vehicles, so that electric vehicles can be used in driving school venues.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a control method and a control system for simulating flameout working conditions of an engine of a fuel automobile of an electric automobile and the electric automobile.
Background
Along with the development of the automobile industry, green, clean and environment-friendly electric automobiles are more and more supported and favored by the nation and the people and are gradually widely applied, and particularly in places with higher personnel concentration, such as driving schools and the like, the electric automobiles are undoubtedly very suitable, so that the low-speed fuel utilization rate of an engine is avoided, and no pollution is caused to the environment due to no exhaust emission. In order to promote the development of new energy and protect the environment, many driving schools have started to use electric vehicles as instruction vehicles and examination vehicles to relieve the dependence of the driving license examination learning process on the traditional fuel vehicles. However, the power transmission structure adopted by the electric automobile on the market at present is not matched with the aim that most driving school students still need to learn the operation mode of the manual fuel-oil-shift automobile, for example, the traditional fuel-oil automobile can cause the engine to suddenly stop due to improper operation of the students, which is the situation that the common electric automobile cannot generate. The working principle and the driving feeling of the electric automobile are different from those of the traditional fuel oil automobile, so that the electric automobile can not be well realized when being applied to a driving school instruction car and an examination car. In order to make the use experience of the electric automobile consistent with that of a traditional fuel vehicle as far as possible, the electric automobile needs to simulate various different working conditions such as a flameout process and the like so as to meet the use requirements of driving schools.
In the control method for simulating the traditional fuel vehicle by using the electric vehicle in the prior art, the driving motor can output large torque at low rotating speed, and the torque output characteristic is different from that of the engine of the traditional fuel vehicle, so that the electric vehicle cannot be in a flameout error state even if the electric vehicle is operated by mistake or is not operated properly, the use requirements of driving school instruction vehicles and test vehicles are not met, and potential safety hazards also exist.
Disclosure of Invention
The invention provides a control method for simulating flameout conditions of an engine of an electric vehicle by utilizing the simulated fuel vehicle of the electric vehicle to overcome the defect that the simulated fuel vehicle of the electric vehicle does not meet the use requirements of a driving school learner-driven vehicle and an examination vehicle in the prior art, and can truly and reliably simulate various conditions causing flameout of the traditional fuel vehicle in the learning or examination process of the driving school, so that the electric vehicle meets the use requirements of the driving school learner-driven vehicle and the examination vehicle, and feasibility and effectiveness are provided for popularization and use of the electric vehicle in a driving school field. The invention also relates to a control system for simulating the flameout condition of the engine of the fuel vehicle for the electric vehicle and the electric vehicle comprising the control system.
The technical scheme of the invention is as follows:
a control method for simulating flameout condition of an engine of a fuel vehicle by an electric automobile comprises a manual gear speed change and gear shift working state simulation step, an engine rotating speed simulation step, a data acquisition step, a gear shift judgment step, a vehicle speed judgment step, a timing step and a flameout signal sending step,
the method comprises the steps of simulating a gear shifting working state of an electric automobile, namely, adopting a gear shifting lever of the electric automobile as a manual gear shifting lever with multiple gears to simulate the lever, arranging a clutch pedal on the left side of a bottom plate of a cab of the electric automobile to simulate a clutch, judging the working state of the simulated clutch by collecting position information of the clutch pedal, judging the working state of the simulated lever by collecting position information of the manual gear shifting lever in different gears, and calculating the output torque of a driving motor in different states and controlling the output of the driving motor by a torque controller based on the working states of the simulated clutch and the simulated lever;
the engine rotating speed simulation step is to simulate the engine rotating speed of the electric automobile based on the change relation of the engine rotating speed of the manual fuel-oil-shift vehicle along with the position of an acceleration pedal or the position of a clutch pedal to obtain the simulated engine rotating speed;
the data acquisition step is used for acquiring the current speed, the engine simulation rotating speed and the current gear value of the electric automobile;
the gear shifting judging step judges whether gear shifting misoperation exists according to the working state of the simulation clutch and the current gear value, and enters a flameout signal sending step when the gear shifting misoperation exists, or enters a vehicle speed judging step;
the vehicle speed judging step is used for judging the vehicle speed according to the current gear value, and entering a timing step when the current vehicle speed enters a flameout vehicle speed threshold range corresponding to the current gear value or when the simulated rotating speed of the engine is smaller than a preset simulated rotating speed threshold value;
the timing step is used for timing, and a flameout signal sending step is carried out when a preset time threshold is exceeded and the engine simulation rotating speed is still smaller than a preset simulation rotating speed threshold;
and the flameout signal sending step judges that the electric automobile is about to flameout, and sends a flameout signal.
In the step of simulating the working state of the manual gear speed change and gear shift, the position information of a clutch pedal is acquired by a Hall sensor, a voltage signal is output and then subjected to analog-to-digital conversion so as to be converted into a clutch pedal position digital signal, and the working state of the simulated clutch in separation, semi-linkage or combination is judged according to the clutch pedal position digital signal; voltage signals output by the Hall sensor are subjected to analog-to-digital conversion at different gear positions of the manual gear shifting stop lever so as to be converted into digital signals of the position of the stop lever, and the working state of the analog stop lever in a certain gear is judged according to the digital signals of the position of the stop lever; and then the torque controller calculates the output torque of the driving motor under different states and controls the output of the driving motor based on the working states of the simulation clutch and the simulation gear lever and in combination with the working states of an accelerator pedal and a brake pedal and signals of a battery management system.
In the step of simulating the working state of the manual gear speed change and gear shift, a gear shift lever of the electric automobile adopts a manual gear shift lever with six gears.
In the engine speed simulation step, the engine speed simulation is carried out on the electric automobile by adopting a mode of combining an interpolation method and a vehicle speed reverse method: specifically, based on the change relation of the engine speed along with the position of an accelerator pedal or the position of a clutch pedal when a manual-gear fuel vehicle is in a neutral gear or a clutch is separated, a change curve of the engine speed along with the position of the accelerator pedal or the position of the clutch pedal is calculated through interpolation; then reversely pushing by combining a vehicle speed reverse pushing method with a current torque transmission coefficient of a clutch of the manual-gear fuel vehicle, vehicle speed information of the manual-gear fuel vehicle and a transmission ratio of a transmission structure of the manual-gear fuel vehicle to obtain the engine rotating speed of the manual-gear fuel vehicle; and then carrying out engine speed simulation on the electric automobile according to the obtained engine speed of the manual fuel-shift vehicle.
In the vehicle speed judging step, whether the current vehicle speed is greater than a traveling minimum vehicle speed threshold or not is judged, a traveling working condition is adopted when the current vehicle speed is greater than the traveling minimum vehicle speed threshold, then vehicle speed judgment is carried out according to the current gear value, and a timing step is carried out when the current vehicle speed enters a flameout vehicle speed threshold range corresponding to the current gear value or when the simulated rotating speed of an engine is less than a preset simulated rotating speed threshold; and when the current vehicle speed is less than or equal to the lowest traveling vehicle speed threshold value, the starting working condition is adopted, and when the engine simulation rotating speed is less than a preset simulation rotating speed threshold value, the timing step is carried out.
A control system for simulating flameout working conditions of an engine of a fuel vehicle for an electric automobile comprises a manual gear speed changing and shifting working state simulation module, an engine rotating speed simulation module, a data acquisition module, a gear shifting judgment module, a vehicle speed judgment module, a timing module and a flameout signal sending module, wherein the manual gear speed changing and shifting working state simulation module and the engine rotating speed simulation module are connected with the data acquisition module, the gear shifting judgment module, the vehicle speed judgment module, the timing module and the flameout signal sending module are sequentially connected, the gear shifting judgment module is further connected with the flameout signal sending module,
the manual gear shifting speed-changing gear-shifting working state simulation module adopts a gear-shifting lever of an electric automobile as a manual gear-shifting lever with multiple gears to simulate the lever, a clutch pedal is arranged on the left side of a bottom plate of an electric automobile cab to simulate a clutch, the working state of the simulated clutch is judged by collecting position information of the clutch pedal, the working state of the simulated lever is judged by collecting position information of the manual gear-shifting lever in different gears, and then the torque controller calculates the output torque of a driving motor in different states and controls the output of the driving motor based on the working states of the simulated clutch and the simulated lever;
the engine rotating speed simulation module is used for simulating the rotating speed of the engine of the electric automobile based on the change relation of the rotating speed of the engine of the manual fuel-oil-shift vehicle along with the position of an acceleration pedal or the position of a clutch pedal to obtain the simulated rotating speed of the engine;
the data acquisition module is used for acquiring the current speed, the engine simulation rotating speed and the current gear value of the electric automobile;
the gear shifting judging module judges whether gear shifting misoperation exists according to the working state of the simulation clutch and the current gear value, and enters the flameout signal sending module when the gear shifting misoperation is determined to exist;
the vehicle speed judging module is used for judging vehicle speed according to the current gear value and entering the timing module when the current vehicle speed enters a flameout vehicle speed threshold range corresponding to the current gear value or when the simulated rotating speed of the engine is smaller than a preset simulated rotating speed threshold value;
the timing module is used for timing and entering the flameout signal sending module when the preset time threshold is exceeded and the engine simulation rotating speed is still smaller than the preset simulation rotating speed threshold;
the flameout signal sending module judges that the electric automobile is about to flameout and sends a flameout signal.
The simulation gear lever module adopts a gear shifting gear lever of the electric automobile as a manual gear shifting gear lever with multiple gears to simulate the gear lever; the simulation clutch module is provided with a clutch pedal on the left side of a bottom plate of an electric automobile cab to simulate a clutch; the analog clutch working state judgment module comprises a first Hall element, a first analog-to-digital converter and a first working state judgment module, position information of a clutch pedal is acquired through a first Hall sensor, a voltage signal is output and then subjected to analog-to-digital conversion through the first analog-to-digital converter so as to be converted into a clutch pedal position digital signal, and the first working state judgment module judges that the analog clutch is in a separated, semi-linked or combined working state according to the clutch pedal position digital signal; the analog gear lever working state judging module comprises a second Hall element, a second analog-to-digital converter and a second working state judging module, different gear position information of the manual gear shifting gear lever is acquired through a second Hall sensor, a voltage signal is output, analog-to-digital conversion is carried out through the second analog-to-digital converter, and then the gear position digital signal is converted, and the second working state judging module judges the working state of the analog gear lever in a certain gear according to the gear position digital signal; the output torque calculation module is used for calculating the output torque of the driving motor under different states and controlling the output of the driving motor by the torque controller based on the working states of the simulation clutch and the simulation gear lever and in combination with the working states of the accelerator pedal and the brake pedal and signals of the battery management system.
The engine rotating speed simulation module comprises an interpolation method processing module, a vehicle speed reverse-pushing method processing module and a comprehensive processing module, wherein the interpolation method processing module calculates a change curve of the engine rotating speed along with the position of an accelerator pedal or a clutch pedal through interpolation based on the change relation of the engine rotating speed along with the position of the accelerator pedal or the position of the clutch pedal when the manual-gear fuel vehicle is in neutral gear or the clutch is separated; the vehicle speed reverse pushing method is combined with the current torque transmission coefficient of a clutch of the manual-gear fuel vehicle, the vehicle speed information of the manual-gear fuel vehicle and the transmission ratio of a transmission structure of the manual-gear fuel vehicle to perform reverse pushing to obtain the engine speed of the manual-gear fuel vehicle; and the comprehensive processing module performs engine speed simulation on the electric automobile according to the results of the interpolation processing module and the vehicle speed reverse-deducing processing module.
The vehicle speed judging module judges whether the current vehicle speed is greater than a traveling minimum vehicle speed threshold value or not, the vehicle speed judging module is a traveling working condition when the current vehicle speed is greater than the traveling minimum vehicle speed threshold value, then vehicle speed judgment is carried out according to the current gear value, and the vehicle speed judging module enters the timing module when the current vehicle speed enters a flameout vehicle speed threshold value range corresponding to the current gear value or when the simulated rotating speed of an engine is less than a preset simulated rotating speed threshold value; and when the current vehicle speed is less than or equal to the minimum traveling vehicle speed threshold value, the starting working condition is set, and when the engine simulation rotating speed is less than a preset simulation rotating speed threshold value, the timing module is started.
The electric automobile adopting the control system for simulating the flameout working condition of the engine of the fuel vehicle is provided.
The invention has the following technical effects:
the invention relates to a control method for simulating the flameout condition of an engine of a fuel vehicle by an electric vehicle, which comprises a manual gear speed change and gear shift working state simulation step, an engine rotating speed simulation step, a data acquisition step, a gear shift judgment step, a vehicle speed judgment step, a timing step and a flameout signal sending step, wherein a simulation gear lever and a simulation clutch are adopted in the method, so that a driver can drive the electric vehicle to have the driving feeling which can be operated like driving the traditional manual gear fuel vehicle, a torque controller is used for controlling the output of a driving motor based on the simulation gear lever and the simulation clutch state so as to ensure that the working state of the electric vehicle is consistent with the performance of the traditional manual gear fuel vehicle, the engine rotating speed of the electric vehicle is further simulated to obtain the engine simulated rotating speed, and under the condition that the electric vehicle can accurately simulate the traditional manual gear fuel vehicle from the driving feeling and the working state in all directions, the method further comprises a data acquisition step, a gear shifting judgment step, a vehicle speed judgment step, a timing step and a flameout signal sending step, and finally realizes the flameout working condition of the electric vehicle simulated fuel vehicle engine through a series of specific steps of acquiring the current vehicle speed, the engine simulated rotating speed and the current gear value of the electric vehicle, judging and comparing the current vehicle speed, entering timing according to the judgment and comparison result, and sending a flameout signal according to the timing judgment and judgment result, so that the electric vehicle can truly and reliably simulate various conditions that the resistance of the traditional fuel vehicle output power caused by high gear start, too fast clutch release, misoperation of a device fault and the like of a driver in the driving school learning or examination process cannot be overcome, and the flameout of the fuel vehicle is caused by the unmatched gear and the vehicle speed in the driving process, so that the operation method and the operation result of the electric vehicle and the traditional fuel vehicle are kept consistent, the electric automobile has the advantages that students who learn to drive do not have any difference with fuel automobiles, so that the electric automobile meets the use requirements of driving school instructional cars and test cars, feasibility and effectiveness are provided for popularization and use of the electric automobile in driving school sites, the vehicle maintenance cost caused by serious loss of the fuel automobiles due to frequent flameout in the driving process of the students in the driving school is reduced, and the environmental pollution is reduced.
Furthermore, in the manual gear speed change and gear shift working state simulation step, the clutch pedal signals and the gear lever signals are collected and converted by utilizing a Hall sensor and an analog-to-digital conversion principle, so that the working states of the clutch pedal signals and the gear lever signals are respectively judged, corresponding signal transmission can be faster and more efficient, the working period of the overall control method can be shortened, and the signal transmission is more accurate.
Furthermore, in the engine speed simulation step, an interpolation method and a vehicle speed reverse method are combined to simulate the engine speed of the electric vehicle, wherein the interpolation method and the vehicle speed reverse method are applied in stages, the interpolation method is adopted when the manual-gear fuel vehicle is in neutral or the clutch is separated (the vehicle speed can be understood as 0), the vehicle speed reverse method is adopted when the vehicle speed of the manual-gear fuel vehicle is greater than 0, and the two methods are combined for use, so that the process of simulating the engine speed of the electric vehicle according to the comprehensive result is more accurate.
The invention also relates to a control system for simulating the flameout condition of the engine of the fuel vehicle by the electric vehicle, which finally realizes that the electric vehicle simulates the driving feeling and the working state of the engine of the fuel vehicle by arranging a manual gear speed change and gear shift working state simulation module, an engine rotating speed simulation module, a data acquisition module, a gear shift judgment module, a vehicle speed judgment module, a timing module and a flameout signal sending module through the mutual cooperation of the modules, so that the electric vehicle can truly and reliably simulate various conditions that the output power of the engine of the traditional fuel vehicle cannot overcome resistance in the learning or examination process of driving schools and the gear and the vehicle speed are not matched in the driving process to further cause flameout of the fuel vehicle, the operation method and the operation result of the electric vehicle and the traditional fuel vehicle are kept consistent, and a student who learns to drive the fuel vehicle does not have any difference from the fuel vehicle, and further the electric automobile meets the use requirements of driving school instruction cars and test cars.
The invention also relates to an electric automobile comprising the control system for simulating the flameout condition of the engine of the fuel-oil automobile, which can fully and accurately simulate the working state of the traditional manual-gear fuel-oil automobile and enable the electric automobile to be used as a driving school instruction car or an examination car.
Drawings
FIG. 1: the invention relates to a work flow chart of a control method for simulating flameout working conditions of an engine of a fuel vehicle of an electric automobile.
FIG. 2: the invention discloses an optimal judgment flow chart of a control method for simulating the flameout condition of an engine of a fuel vehicle of an electric automobile.
FIG. 3: the invention relates to an optimal structure diagram of a control system for simulating a flameout condition of an engine of a fuel vehicle of an electric automobile.
Detailed Description
The invention relates to a control method for simulating flameout conditions of an engine of a fuel vehicle by an electric automobile, which specifically comprises a manual gear speed change and gear shift working state simulation step, an engine rotating speed simulation step, a data acquisition step, a gear shift judgment step, a vehicle speed judgment step, a timing step and a flameout signal sending step: the method comprises the steps of simulating a gear shifting working state of an electric automobile, namely, adopting a gear shifting lever of the electric automobile as a manual gear shifting lever with multiple gears to simulate the lever, arranging a clutch pedal on the left side of a bottom plate of a cab of the electric automobile to simulate a clutch, judging the working state of the simulated clutch by collecting position information of the clutch pedal, judging the working state of the simulated lever by collecting position information of the manual gear shifting lever in different gears, and calculating the output torque of a driving motor in different states and controlling the output of the driving motor by a torque controller based on the working states of the simulated clutch and the simulated lever; the engine rotating speed simulation step is to simulate the engine rotating speed of the electric automobile based on the change relation of the engine rotating speed of the manual fuel-oil-shift vehicle along with the position of an acceleration pedal or the position of a clutch pedal to obtain the simulated engine rotating speed; the data acquisition step is used for acquiring the current speed, the engine simulation rotating speed and the current gear value of the electric automobile; the gear shifting judging step judges whether gear shifting misoperation exists according to the working state of the simulation clutch and the current gear value, and enters a flameout signal sending step when the gear shifting misoperation exists, or enters a vehicle speed judging step; the vehicle speed judging step is used for judging the vehicle speed according to the current gear value, and entering a timing step when the current vehicle speed enters a flameout vehicle speed threshold range corresponding to the current gear value or when the simulated rotating speed of the engine is smaller than a preset simulated rotating speed threshold value; the timing step is used for timing, and a flameout signal sending step is carried out when a preset time threshold is exceeded and the engine simulation rotating speed is still smaller than a preset simulation rotating speed threshold; the flameout signal sending step judges that the electric automobile is about to flameout, and sends a flameout signal; the method enables the electric automobile to truly and reliably simulate the driving feeling and the working state of the traditional fuel vehicle in the learning or examination process of a driving school, and particularly can accurately simulate various conditions of flameout working conditions of the fuel vehicle in the driving process, so that the operation method and the operation result of the electric automobile and the traditional fuel vehicle are kept consistent.
The present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a work flow chart of a control method for simulating a flameout condition of an engine of a fuel-fired vehicle by an electric vehicle, as shown in fig. 1, the method specifically comprises a manual gear shifting working state simulation step, an engine speed simulation step, a data acquisition step, a gear shifting judgment step, a vehicle speed judgment step, a timing step and a flameout signal sending step, after the manual gear shifting working state simulation step and the engine speed simulation step are executed, the data acquisition step is executed, and the following steps are sequentially performed in sequence:
the step of simulating the speed-changing and gear-shifting working state of the manual gear is to adopt a gear-shifting lever of the electric automobile as a manual gear-shifting lever with multiple gears to simulate the lever, preferably adopt a manual gear-shifting lever with six gears, namely a common manual gear-shifting lever comprising 5 gears and an R gear (reverse gear), to ensure that the working effect of the manual gear-shifting lever is consistent with that of a six-gear lever of a traditional manual-gear fuel vehicle, and arrange a clutch pedal on the left side of a bottom plate of a cab of the electric automobile to simulate a clutch (which is arranged according to the position of the clutch pedal of the traditional manual-gear fuel vehicle), judge the working state of the simulated clutch by collecting the position information of the clutch pedal, judge the working state of the simulated lever by collecting the position information of the manual gear-shifting lever at different gears, calculate the output torque of the driving motor under different states by the torque controller based on the working states of the simulated clutch and the simulated lever and control the output of the driving motor, particularly preferably, the position information of the clutch pedal is collected by the Hall sensor, the voltage signal is output and then is subjected to analog-to-digital conversion so as to be converted into a clutch pedal position digital signal, the working state of the analog clutch in separation, semi-linkage or combination is judged according to the digital signal of the pedal position of the clutch, meanwhile, voltage signals output by the Hall sensor are subjected to analog-to-digital conversion at different gear positions of the manual gear shifting stop lever so as to be converted into digital signals of the position of the stop lever, and judging the working state of the simulated gear lever under a certain gear according to the digital signal of the position of the gear lever, and calculating the output torque of the driving motor under different states and controlling the output of the driving motor by the torque controller based on the working states of the simulated clutch and the simulated gear lever and in combination with the working states of the accelerator pedal and the brake pedal and the signal of the battery management system.
The engine speed simulation step is to simulate the engine speed of the electric automobile based on the change relation of the engine speed of the manual fuel-oil-shift vehicle along with the position of an acceleration pedal or the position of a clutch pedal to obtain the simulated engine speed, and preferably, the engine speed of the electric automobile is simulated by combining an interpolation method and a vehicle speed reverse method: specifically, based on the change relation of the engine speed along with the position of an accelerator pedal or the position of a clutch pedal when a manual-gear fuel vehicle is in a neutral gear or the clutch is separated, a change curve of the engine speed along with the position of the accelerator pedal or the clutch pedal is calculated through interpolation, and then the engine speed of the manual-gear fuel vehicle is obtained by combining the current torque transmission coefficient of the clutch of the manual-gear fuel vehicle, the vehicle speed information of the manual-gear fuel vehicle and the transmission ratio of a transmission structure of the manual-gear fuel vehicle through a vehicle speed reverse pushing method; and then carrying out engine speed simulation on the electric automobile according to the obtained engine speed of the manual fuel-shift vehicle.
At this time, a description is further given with reference to a specific determination flow in fig. 2, that is, an optimized determination flow corresponding to the data acquisition step, the gear shift determination step, the vehicle speed determination step, the timing step, and the stall signal transmission step, specifically as follows:
acquiring the current speed V, the engine simulation rotating speed N and the current gear value of the electric automobile through the data acquisition step;
then, judging whether gear shifting misoperation exists or not according to the working state of the simulation clutch and the current gear value through the gear shifting judging step, and entering a flameout signal sending step when the gear shifting misoperation exists, namely entering the flameout signal sending step when the clutch is not stepped on (namely the clutch is in a combined state) before gear shifting is carried out through a gear shifting stop lever, or entering a vehicle speed judging step when the clutch is normally driven; the gear shifting judging step belongs to a misoperation prevention step, and because the manual fuel oil shifting vehicle can shift gears only by stepping on the clutch, and the electric vehicle has a gear shifting lever but has the gear shifting effect that an electric signal is given through an electronic element instead of mechanical combination of a transmission system, the gear shifting can be successful without the clutch, and the arrangement of the step can effectively avoid the wrong gear shifting of a driver under the non-gear shifting consciousness;
then, the vehicle speed is judged according to the current gear value through the vehicle speed judging step, and when the current vehicle speed V enters a flameout vehicle speed threshold range corresponding to the current gear value or when the engine simulated rotation speed N is smaller than a preset simulated rotation speed threshold value N1, the timing step is started, more specifically, preferably, in the vehicle speed judging step, whether the current vehicle speed V is larger than a running minimum vehicle speed threshold value V0(V0 is preferably equal to 0) or not is judged, when the current vehicle speed is larger than the running minimum speed threshold value V0, the vehicle speed is judged according to the current gear value, and when the current vehicle speed V enters the flameout vehicle speed threshold range corresponding to the current gear value or when the engine simulated rotation speed N is smaller than the preset simulated rotation speed threshold value N1, the timing step is started. Specifically, whether the current vehicle speed V is greater than a traveling minimum vehicle speed threshold V0 or not is judged, the vehicle is in a traveling working condition when the current vehicle speed is greater than a traveling minimum vehicle speed threshold V0, then the vehicle speed is judged according to the current gear value, and when the gear value is 0 (neutral), the electric vehicle does not output power, so that the electric vehicle normally runs (namely, a flameout phenomenon caused by improper driving behaviors cannot occur, except for the situation that a driver controls an ignition switch to stop an engine); when the gear value is 1, further judging the engine simulation rotating speed N, and entering a timer timing step when the engine simulation rotating speed N is less than a preset simulation rotating speed threshold value N1, otherwise, normally driving the electric automobile; when the gear value is 2, further judging the current speed V and the engine simulation rotating speed N, and entering a timer timing step when the current speed V is less than a flameout speed threshold V1 corresponding to the gear 2 or the engine simulation rotating speed N is less than a preset simulation rotating speed threshold N1, otherwise, the electric automobile normally runs; when the gear value is 3, further judging the current speed V and the engine simulation rotating speed N, and entering a timer timing step when the current speed V is less than a flameout speed threshold V2 corresponding to the gear 3 or the engine simulation rotating speed N is less than a preset simulation rotating speed threshold N1, otherwise, the electric automobile normally runs; when the gear value is 4, further judging the current vehicle speed V and the engine simulation rotating speed N, and entering a timer timing step when the current vehicle speed V is less than a flameout vehicle speed threshold V3 corresponding to the 4 gear or the engine simulation rotating speed N is less than a preset simulation rotating speed threshold N1, otherwise, the electric vehicle runs normally; when the gear value is 5, further judging the current vehicle speed V or the engine simulation rotating speed N, and entering a timer timing step when the current vehicle speed V is less than a flameout vehicle speed threshold V4 corresponding to the 5-gear or the engine simulation rotating speed N is less than a preset simulation rotating speed threshold N1, otherwise, the electric vehicle runs normally; when the gear value is not 5, namely when the gear value is R (reverse gear), if the simulated engine rotating speed N is less than the preset simulated engine rotating speed N1, entering a timing step, otherwise, normally driving the electric automobile; when the judgment that the current vehicle speed is greater than the traveling minimum vehicle speed threshold V0 is negative (namely the current vehicle speed is less than or equal to the minimum vehicle speed threshold V0), the starting working condition is determined, the timing step is further judged when the engine simulation rotating speed N is less than a preset simulation rotating speed threshold N1, and otherwise, the electric vehicle runs normally;
then, timing is carried out through the timing step, the flameout signal sending step is carried out when the preset time threshold is exceeded and the engine simulated rotating speed N is still smaller than the preset simulated rotating speed threshold N1, specifically, preferably, each condition of entering the timing step needs to be further judged, namely whether the timing time T exceeds the preset time threshold T1 or not needs to be further judged, when the timing time T is larger than the preset time threshold T1, if the engine simulated rotating speed N is still smaller than the preset simulated rotating speed threshold N1, the flameout signal sending step is carried out, otherwise, the electric vehicle runs normally;
and finally, judging that the electric automobile is about to stall through a stall signal sending step, sending a stall signal, judging that the electric automobile is about to stall under each condition of entering the stall signal sending step, and then sending a stall signal to control the electric automobile to turn off power.
The flameout condition simulation of the control method for simulating the flameout condition of the engine of the fuel-oil vehicle of the electric automobile mainly aims at simulating and controlling two conditions that the output power of the engine cannot overcome resistance when the manual-gear fuel-oil vehicle starts and the gear and the vehicle speed are not matched in the driving process. The method comprises the steps of adopting a simulation gear lever and a simulation clutch to enable a driver to drive the electric automobile to have the driving feeling of operating the electric automobile like driving a traditional manual-gear fuel vehicle, utilizing a torque controller to control the output of a driving motor based on the simulation gear lever and the simulation clutch state so as to enable the working state of the electric automobile to be consistent with the performance of the traditional manual-gear fuel vehicle, further enabling the electric automobile to simulate the engine rotating speed to obtain the simulated engine rotating speed, further setting a data acquisition step, a gear shifting judgment step, a vehicle speed judgment step, a timing step and a flameout signal sending step under the condition that the electric automobile can accurately simulate the traditional manual-gear fuel vehicle in all directions from the driving feeling and the working state, and enabling the electric automobile to enter timing according to the judgment comparison result and send a flameout signal after the judgment and comparison result according to the timing after acquiring the current vehicle speed V, the simulated engine rotating speed N and the current gear position value of the electric automobile and comparing with the corresponding threshold value A series of specific steps of the electric automobile finally realize the flameout condition of the engine of the fuel vehicle simulated by the electric automobile, so that the electric automobile can truly and reliably simulate various conditions that the traditional fuel vehicle cannot overcome resistance due to high-gear starting, too fast loose clutch, misoperation or equipment failure of a driver or the like in the learning or examination process of a driving school, and the fuel vehicle is flameout due to mismatching of gears and vehicle speed in the driving process, so that the operation methods and the operation results of the electric automobile and the traditional fuel vehicle are kept consistent, a student learning to drive does not have any difference from using the fuel vehicle, the electric automobile further meets the use requirements of teaching vehicles and test vehicles in the driving school, feasibility and effectiveness are provided for popularization and use of the electric automobile in the driving school, and the vehicle maintenance cost caused by serious loss of the fuel vehicle due to frequent flameout in the driving process of the student in the driving school is reduced, and is also beneficial to reducing environmental pollution.
The invention also relates to a control system for simulating the flameout condition of the engine of the fuel vehicle by the electric vehicle, which corresponds to the control method for simulating the flameout condition of the engine of the fuel vehicle by the electric vehicle and can be understood as a system for realizing the control method for simulating the flameout condition of the engine of the fuel vehicle by the electric vehicle. The structure of the control system is shown in fig. 3, and the control system specifically comprises a manual-gear speed-changing and gear-shifting working state simulation module, an engine speed simulation module, a data acquisition module, a gear-shifting judgment module, a vehicle speed judgment module, a timing module and a flameout signal sending module, wherein the manual-gear speed-changing and gear-shifting working state simulation module and the engine speed simulation module are connected with the data acquisition module, the gear-shifting judgment module, the vehicle speed judgment module, the timing module and the flameout signal sending module are sequentially connected, and the gear-shifting judgment module is further connected with the flameout signal sending module.
The manual gear shifting working state simulation module adopts a gear shifting rod of an electric automobile as a manual gear shifting rod with multiple gears to simulate the gear shifting rod, a clutch pedal is arranged on the left side of a bottom plate of a cab of the electric automobile to simulate a clutch, the working state of the simulated clutch is judged by collecting position information of the clutch pedal, the working state of the simulated gear shifting rod is judged by collecting the position information of the manual gear shifting rod in different gears, and then a torque controller calculates the output torque of a driving motor in different states and controls the output of the driving motor based on the working states of the simulated clutch and the simulated gear shifting rod, and is specifically represented by comprising a simulated gear shifting rod module, a simulated clutch working state judgment module, a simulated gear shifting rod working state judgment module and an output torque calculation module, the simulation gear lever module adopts a manual gear shifting gear lever with multiple gears as a gear shifting gear lever of the electric automobile to simulate the gear lever, and preferably adopts a manual gear shifting gear lever with six gears; the simulation clutch module is provided with a clutch pedal on the left side of a bottom plate of an electric automobile cab to simulate a clutch; the analog clutch working state judgment module comprises a first Hall element, a first analog-to-digital converter and a first working state judgment module, position information of a clutch pedal is acquired through a first Hall sensor, a voltage signal is output and then subjected to analog-to-digital conversion through the first analog-to-digital converter so as to be converted into a clutch pedal position digital signal, and the first working state judgment module judges that the analog clutch is in a separated, semi-linked or combined working state according to the clutch pedal position digital signal; the analog gear lever working state judging module comprises a second Hall element, a second analog-to-digital converter and a second working state judging module, different gear position information of the manual gear shifting gear lever is acquired through a second Hall sensor, a voltage signal is output, analog-to-digital conversion is carried out through the second analog-to-digital converter, and then the gear position digital signal is converted, and the second working state judging module judges the working state of the analog gear lever in a certain gear according to the gear position digital signal; the output torque calculation module is used for calculating the output torque of the driving motor under different states and controlling the output of the driving motor by the torque controller based on the working states of the simulation clutch and the simulation gear lever and in combination with the working states of the accelerator pedal and the brake pedal and signals of the battery management system.
The engine rotating speed simulation module is used for simulating the rotating speed of the engine of the electric automobile based on the change relation of the rotating speed of the engine of the manual fuel-oil-shift vehicle along with the position of an acceleration pedal or the position of a clutch pedal to obtain the simulated rotating speed of the engine; the data acquisition module is used for acquiring the current speed, the engine simulation rotating speed and the current gear value of the electric automobile; the gear shifting judging module judges whether gear shifting misoperation exists according to the working state of the simulation clutch and the current gear value, and enters the flameout signal sending module when the gear shifting misoperation is determined to exist; the vehicle speed judging module is used for judging vehicle speed according to the current gear value and entering the timing module when the current vehicle speed enters a flameout vehicle speed threshold range corresponding to the current gear value or when the simulated rotating speed of the engine is smaller than a preset simulated rotating speed threshold value; the timing module is used for timing and entering the flameout signal sending module when the preset time threshold is exceeded and the engine simulation rotating speed is still smaller than the preset simulation rotating speed threshold; the flameout signal sending module judges that the electric automobile is about to flameout and sends a flameout signal.
Further preferably, the engine speed simulation module comprises an interpolation processing module, a vehicle speed reverse-pushing processing module and a comprehensive processing module, wherein the interpolation processing module is used for calculating a change curve of the engine speed along with the position of an accelerator pedal or a clutch pedal through interpolation based on the change relation of the engine speed along with the position of the accelerator pedal or the position of the clutch pedal when the manual-gear fuel vehicle is in neutral gear or the clutch is separated; the vehicle speed reverse pushing method is combined with the current torque transmission coefficient of a clutch of the manual-gear fuel vehicle, the vehicle speed information of the manual-gear fuel vehicle and the transmission ratio of a transmission structure of the manual-gear fuel vehicle to perform reverse pushing to obtain the engine speed of the manual-gear fuel vehicle; and the comprehensive processing module performs engine speed simulation on the electric automobile according to the results of the interpolation processing module and the vehicle speed reverse-deducing processing module.
Further preferably, when the vehicle speed judgment module judges the vehicle speed, it first judges whether the current vehicle speed is greater than the lowest vehicle speed threshold value, and when the current vehicle speed is greater than the lowest vehicle speed threshold value, it is the running working condition, and then judges the vehicle speed according to the current gear value, and when the current vehicle speed enters the flameout vehicle speed threshold value range corresponding to the current gear value or when the engine simulated rotation speed is less than the preset simulated rotation speed threshold value, it enters the timing module. Specifically, the judging step may be: when the current vehicle speed is greater than the lowest vehicle speed threshold value of the traveling, the vehicle speed is judged according to the current gear value, and when the gear value is 0 (neutral), the electric vehicle has no power output, so that the electric vehicle normally travels (namely, the flameout phenomenon caused by improper driving behaviors can not occur, except the condition that a driver controls an ignition switch to stop the engine); when the gear value is 1, further judging the simulated rotating speed of the engine, and entering a timer timing step when the simulated rotating speed of the engine is less than a preset simulated rotating speed threshold value, otherwise, normally driving the electric automobile; when the gear value is 2, further judging the current vehicle speed and the engine simulation rotating speed, and entering a timer timing step when the current vehicle speed is less than a flameout vehicle speed threshold value corresponding to the gear 2 or the engine simulation rotating speed is less than a preset simulation rotating speed threshold value, otherwise, normally driving the electric vehicle; when the gear value is 3, further judging the current speed and the engine simulation rotating speed, and entering a timer timing step when the current speed is less than a flameout speed threshold corresponding to the gear 3 or the engine simulation rotating speed is less than a preset simulation rotating speed threshold, otherwise, normally driving the electric automobile; when the gear value is 4, further judging the current vehicle speed and the engine simulation rotating speed, and entering a timer timing step when the current vehicle speed is less than a flameout vehicle speed threshold value corresponding to 4 gears or the engine simulation rotating speed is less than a preset simulation rotating speed threshold value, otherwise, normally driving the electric vehicle; when the gear value is 5, further judging the current speed and the engine simulation rotating speed, and entering a timer timing step when the current speed is less than a flameout speed threshold corresponding to the 5-gear or the engine simulation rotating speed is less than a preset simulation rotating speed threshold, otherwise, normally driving the electric automobile; when the gear value is not 5, namely when the gear value is R (reverse gear), if the simulated engine rotating speed N is less than the preset simulated engine rotating speed, entering a timing step, otherwise, normally driving the electric automobile; if the judgment that the current vehicle speed is greater than the minimum traveling vehicle speed threshold value is negative, the starting working condition is determined, the timing step is further judged when the engine simulation rotating speed is less than the preset simulation rotating speed threshold value, otherwise, the electric vehicle runs normally; and when the judgment that the current vehicle speed is greater than the traveling minimum vehicle speed threshold is negative, the starting working condition is determined, and when the engine simulation rotating speed is less than a preset simulation rotating speed threshold, the timing module is started to time.
The system is provided with a manual gear speed change and gear shift working state simulation module, an engine rotating speed simulation module, a data acquisition module, a gear shift judgment module, a vehicle speed judgment module, a timing module and a flameout signal sending module, then the driving feeling and the working state of an engine of the fuel vehicle are finally simulated by the electric vehicle through the mutual matching work of the modules, especially the flameout working condition of the fuel vehicle can be accurately simulated, so that the electric vehicle can truly and reliably simulate various conditions that the output power of the engine of the traditional fuel vehicle cannot overcome resistance in the learning or examination process of driving schools and the gear and the vehicle speed are not matched in the driving process, and the fuel vehicle is flameout, the operation methods and the operation results of the electric vehicle and the traditional fuel vehicle are kept consistent, a student who learns to drive the vehicle and does not have any difference from the fuel vehicle, and the electric vehicle conforms to driving school teaching vehicles, The use requirement of the test car provides possibility for the driving school to use the electric automobile to train students in the driving school, realizes the accurate simulation of the flameout working condition of the manual transmission fuel automobile in the driving process of the single-stage deceleration electric automobile, and can save the vehicle maintenance cost of the driving school.
The invention also relates to an electric automobile comprising the control system for simulating the flameout condition of the engine of the fuel automobile by the electric automobile, namely a novel electric automobile, which adopts the control system for simulating the flameout condition of the engine of the fuel automobile shown in figure 3, realizes the novel electric automobile with the function of simulating the flameout condition of the engine of the fuel automobile, can fully and accurately simulate the working state of the traditional manual fuel automobile, particularly can fully simulate two conditions that the engine output power cannot overcome resistance when the manual fuel automobile starts and the manual fuel automobile is not matched with the speed of the electric automobile in the driving process to further cause flameout of the manual fuel automobile, realizes the accurate simulation of the flameout condition of the manual fuel automobile in the driving process of the electric automobile, enables the electric automobile to be used as a driving school teaching automobile or an examination automobile, and can completely avoid the flameout condition of the manual fuel automobile caused by the fact that the engine does not work in a speed interval best matched with the movement of the automobile Under the fire working condition, the novel electric automobile can be used for replacing the automobile maintenance cost caused by fuel consumption and long-term abrasion of the clutch due to frequent flameout phenomenon in the driving process of a student in a driving school.
It should be noted that the above-mentioned embodiments enable a person skilled in the art to more fully understand the invention, without restricting it in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.
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