Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which are made by a person skilled in the art based on the embodiments of the application in light of the present disclosure, are intended to be within the scope of the application.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The terms involved in the present application will be explained first.
The range-extending power type vehicle is a strategy for completing the running control of the whole vehicle by a vehicle controller, mainly appears on vehicles powered by electric power such as new energy vehicles and the like, and can be regarded as a transitional vehicle type between a pure electric vehicle and a hybrid electric vehicle.
The clutch is a common component in mechanical transmission and can disconnect or connect the transmission system at any time.
A Direct current-Direct current (DC-DC) converter is a voltage converter that converts an input voltage and effectively outputs a fixed voltage, and can convert one Direct current voltage into another Direct current voltage.
In the prior art provided in the background art, at least the following technical problems exist:
Along with the environmental protection development theme of the current social carbon neutralization, vehicles gradually develop from traditional fuel power vehicle types to hybrid power vehicle types, pure electric vehicle types and the like. The hybrid electric vehicle type and the pure electric vehicle type can both adopt an electric compressor, but the control of the electric compressor is complex and is easily influenced by a high-voltage circuit to be damaged or not operated, so that the use experience of the vehicle is poor.
In view of the above, the present application provides a vehicle control method, in which a mechanical compressor is adapted to a range-extended power vehicle, the range-extended power vehicle includes a first clutch and a second clutch, the mechanical compressor is connected to a motor through the first clutch, the motor is connected to an engine through the second clutch, a current driving source of the motor is determined according to a current electric quantity of a battery, whether the current driving source of the motor is the battery or the engine is determined according to a current electric quantity of the battery, and then a state of the first clutch and a state of the second clutch are determined, so that whether to drive a mechanical compressor to do work by a refrigerant or not is determined according to the state of the first clutch and the state of the second clutch, and whether to charge the battery by power generation of the motor is implemented. The scheme provided by the application is that the mechanical compressor is adapted to the range-extending power type vehicle, so that the problem of poor vehicle use experience caused by using the electric compressor can be avoided.
In one embodiment, the vehicle control method may be applied in an application scenario. Fig. 1 is a schematic structural diagram of an extended range power vehicle according to an embodiment of the present application, and as shown in fig. 1, the extended range power vehicle may include a battery, a DC-DC converter, a driving part, and an engine. The battery is connected to a drive unit via a DC-DC converter, the drive unit being connected to an engine, which may be a piston engine.
In the above-described scenario, the driving part, which mainly includes the power output region, the motor region, and the compression region, is integrated with the refrigerant compression and power output functions, as shown in fig. 2.
Wherein the power take-off area mainly comprises the second clutch and the driving gear. The second clutch can use a hydraulic clutch, and hydraulic oil is injected or discharged into a cavity in the second clutch structure to realize the separation and the closing of the second clutch, so that the impact of the clutch in the closing connection process is avoided.
The motor region mainly comprises a stator, a rotor and a drive shaft, which can be of integral design. Under the action of the current, the rotor rotates, and power is transmitted to the compression area and the power output area through the driving shaft.
The compression area mainly comprises a static disc, a dynamic disc and a first clutch. When the battery or the air conditioner has a cooling request, the driving shaft of the motor area drives the movable disc to rotate, and the movable disc and the static disc are mutually extruded in the rotating process of the movable disc, so that the refrigerant is compressed. The first clutch can use a hydraulic clutch, and the separation and the closing of the first clutch are realized by injecting or discharging hydraulic oil into the cavity in the first clutch structure, so that the impact of the clutch in the closing connection process is avoided.
In the above scenario, the range-extending power vehicle may further include a refrigerant inlet and a refrigerant outlet, as shown in fig. 2, where the refrigerant inlet may be disposed in the motor area, the refrigerant outlet may be disposed in the compression area, and a channel may be disposed between the motor area and the compression area, for the refrigerant to flow from the motor area into the compression area. And a cover plate can be arranged between the motor area and the power output area, and the cover plate is used for sealing to prevent the refrigerant from flowing into the power output area from the motor area. The refrigerant inlet society is arranged in the motor area, so that the motor area can be cooled by utilizing the refrigerant, and then the refrigerant enters the compression stage of the refrigerant.
In combination with the above scenario, the following describes in detail the technical solution of the vehicle control method provided by the present application through several specific embodiments.
The application provides a vehicle control method which can be used for running control of a range-extending power type vehicle comprising a mechanical compressor, wherein the range-extending power type vehicle comprises a first clutch and a second clutch, the mechanical compressor is connected with a motor through the first clutch, and the motor is connected with an engine through the second clutch. Fig. 3 is a flowchart of a vehicle control method according to an embodiment of the present application, as shown in fig. 3, the method includes the following steps:
s301, determining whether the current electric quantity of the battery is larger than an electric quantity threshold value.
In this step, the power threshold may be a preset battery power value that may drive the motor to operate. When the current electric quantity of the battery is smaller than or equal to the electric quantity threshold value, the current electric quantity of the battery is not capable of driving the motor to operate, and at the moment, a current driving source of the motor needs to be replaced and the battery needs to be charged.
And S302, determining the current driving source of the motor according to the determination result.
In the step, when the current electric quantity of the battery is larger than the electric quantity threshold, the current electric quantity of the battery can be used for driving the motor to operate, at the moment, the current driving source of the motor is the battery, and when the current electric quantity of the battery is smaller than or equal to the electric quantity threshold, the current electric quantity of the battery can not be used for determining the motor to operate, at the moment, the current driving source of the motor is the engine.
And S303, controlling the state of the second clutch based on the current driving source.
In this step, the state of the second clutch includes open and closed. The motor is connected with the engine through the second clutch, so that the state of the second clutch can be controlled to be closed if the current driving source is the engine, and the operation of the motor is realized through the engine.
And S304, controlling the state of the first clutch based on whether the cooling request of the battery and/or the air conditioner is detected.
In this step, the state of the first clutch includes open and closed. The mechanical compressor is connected with the motor through the first clutch, when the battery and/or the air conditioner is detected to have a cooling request, the mechanical compressor is required to do refrigerant work, so that the state of the first clutch is required to be controlled to be closed, the motor can drive the mechanical compressor to do refrigerant work, when the battery and/or the air conditioner is not detected to have a cooling request, the mechanical compressor is not required to do refrigerant work, so that the motor is not required to drive the mechanical compressor to do refrigerant work, and the state of the first clutch is required to be controlled to be separated.
In the scheme, the control of the power source for the running of the vehicle and the control of the mechanical compressor can be realized by controlling the state of the first clutch and the state of the second clutch, so that the problems that the control of the electric compressor is complex and the electric compressor is easily influenced by a high-voltage circuit to damage or not work are avoided, and the use experience of the vehicle is improved.
According to the vehicle control method, the mechanical compressor is adapted to the range-extending power type vehicle, whether the current driving source of the motor is the battery or the engine is determined according to the current electric quantity of the battery, the motor can be connected with the engine through the second clutch, so that the state of the second clutch can be controlled to be separated or closed after the current driving source of the motor is determined, the mechanical compressor can be connected with the motor through the first clutch, whether the state of the first clutch is separated or closed can be controlled by determining whether the cooling request of the battery or the air conditioner is detected, and whether the refrigerant of the mechanical compressor is driven to do work or not can be determined according to the state of the first clutch and the state of the second clutch, and whether the battery is charged through power generation of the motor is achieved, so that the use experience of the vehicle is improved.
In one embodiment, controlling the state of the second clutch based on the current drive source includes controlling the second clutch to disengage in response to the current drive source being a battery and/or controlling the second clutch to close in response to the current drive source being an engine.
In this scheme, when the current electric quantity of the battery is greater than the electric quantity threshold value, it is indicated that the current electric quantity of the battery can be used for driving the motor to operate, and therefore, the current driving source of the motor is the battery, and therefore, the motor does not need to be driven by the engine to operate, and thus, the state of the second clutch can be controlled to be separated, and thus, the power transmission between the driving gear and the engine flywheel is terminated, and the engine stops operating.
In the above scheme, when the current electric quantity of the battery is less than or equal to the electric quantity threshold, it is indicated that the current electric quantity of the battery cannot be used for driving the motor to operate, and at this time, the engine is required to drive the motor to operate, that is, the current power source of the motor is the engine, so that the state of the second clutch can be controlled to be closed.
In the above scheme, when the current power source of the motor is the engine, the rotor of the motor area can be driven to rotate by the current electric quantity of the battery after the second clutch is closed, and the driving shaft is driven to transmit power to the driving gear, so that the starting of the engine is assisted. At this time, although the current electric quantity of the battery is smaller than the electric quantity threshold, the electric quantity required for driving the rotor to rotate is small, so that the current electric quantity of the battery can meet the starting requirement of the booster engine.
In one embodiment, controlling the state of the first clutch based on whether a cooling request of the battery and/or the air conditioner is detected includes controlling the first clutch to close in response to detecting the cooling request and/or controlling the first clutch to disengage in response to not detecting the cooling request.
In this scheme, the mechanical compressor is connected with the motor through the first clutch, so that if a cooling request of the battery and/or the air conditioner is detected, the mechanical compressor needs to perform refrigerant work, at the moment, the motor needs to drive the mechanical compressor to operate, and therefore, the first clutch needs to be controlled to be closed, and if the cooling request of the battery and/or the air conditioner is not detected, the mechanical compressor does not need to perform refrigerant work, at the moment, the first clutch can be controlled to be closed, and therefore, the motor cannot drive the mechanical compressor to operate.
In one embodiment, the method further comprises controlling the battery driven motor to operate in response to the detection of the cooling request after the second clutch is controlled to be disengaged, enabling the mechanical compressor refrigerant to work, controlling the engine driven motor to operate in response to the detection of the cooling request after the second clutch is controlled to be closed, enabling the mechanical compressor refrigerant to work and the motor to charge the battery, and controlling the engine driven motor to charge the battery in response to the non-detection of the cooling request after the second clutch is controlled to be closed.
In the scheme, after the second clutch is controlled to be separated, the engine stops running, and at the moment, the current electric quantity of the battery can be used for driving the motor to run, so that if a cooling request of the battery and/or an air conditioner is detected, the battery can be controlled to drive the motor to run, and the mechanical compressor is controlled to do refrigerant work. Alternatively, after controlling the second clutch to be disengaged, if a cooling request of the battery and/or the air conditioner is not detected, the first clutch may be controlled to be disengaged, and at this time, the battery is only used as a power source for driving the vehicle to run.
In the above scheme, after the second clutch is controlled to be closed, the engine starts to run, at this time, the current electric quantity of the battery cannot be used for driving the motor to run, so if the cooling request of the battery and/or the air conditioner is detected, the engine can be controlled to be used as the current power source of the motor to drive the motor to run, so that the mechanical compressor is controlled to do work on the refrigerant, meanwhile, because the current electric quantity of the battery is insufficient, the motor can also enter a power generation mode when the motor is driven to run, and the battery is charged through the DC-DC converter.
In the above scheme, after the second clutch is controlled to be closed, the engine is started to run, and at this time, the current electric quantity of the battery cannot be used for driving the motor to run, so if the cooling request of the battery and/or the air conditioner is not detected, the engine can be controlled to serve as the current power source of the motor, and only the motor is driven to enter the power generation mode to charge the battery.
In one embodiment, controlling operation of the engine drive motor includes controlling the engine drive motor to a forward braking state during engine operation and/or controlling the engine drive motor to an acceleration forward state upon detection of engine start.
In this case, the operating state of the motor may be represented by fig. 4, and in fig. 4, the abscissa may be used to represent the rotational speed of the motor and the ordinate may be used to represent the torque of the motor. When the engine is in operation, the second clutch is in a closed state, at which time the motor may operate in the fourth quadrant as shown in fig. 4, i.e., at which time the motor is in a forward braking state (or generating state). If the battery and/or the air conditioner has a cooling request, the first clutch is controlled to be closed, and the engine synchronously drives the mechanical compressor to do refrigerant work through the driving shaft.
In the above-described scheme, when the engine is just started, the state of the second clutch is closed, at which time the motor may operate in the first quadrant as shown in fig. 4, that is, at which time the motor is in an acceleration-forward state. The engine can be started in a boosting way through the motor, namely, the motor can drive the driving gear to rotate through the driving shaft, so that the engine is driven to start.
In the above scheme, when the motor works at the first quadrant, the torque of the motor is positive, and the rotating speed is positive, and when the motor works at the fourth quadrant, the torque of the motor is negative, and the rotating speed is positive.
In one embodiment, controlling the operation of the battery-operated motor includes controlling the battery-operated motor to an acceleration forward state.
In this scenario, when the engine is stopped, the state of the second clutch is disengaged, at which point the motor may operate in the first quadrant as shown in FIG. 4. If the battery and/or the air conditioner has a cooling request, the first clutch is controlled to be closed, and the engine synchronously drives the mechanical compressor to do refrigerant work through the driving shaft.
In the above scheme, the motor can operate in the second quadrant and the third quadrant besides the first quadrant and the fourth quadrant. The motor is in a reverse braking state when running in the second quadrant, the torque of the motor is positive and the rotating speed is negative, and in an accelerating reverse state when running in the third quadrant, the torque of the motor is negative and the rotating speed is negative.
In one embodiment, the method comprises the steps of determining a driving source of a motor according to a determination result, wherein the determining of the driving source of the motor is performed by responding to the determination result that the current electric quantity is larger than an electric quantity threshold value, and/or determining of the driving source of the motor is performed by responding to the determination result that the current electric quantity is smaller than or equal to the electric quantity threshold value.
In general, the technical scheme provided by the application reduces the control difficulty of the compressor by adapting the mechanical compressor for the range-extending power type vehicle, and is a technical implementation method capable of improving the use experience of the vehicle.
The application also provides a vehicle control device which is used for controlling the operation of the range-extending power type vehicle comprising the mechanical compressor, wherein the range-extending power type vehicle comprises a first clutch and a second clutch, the mechanical compressor is connected with a motor through the first clutch, and the motor is connected with an engine through the second clutch. Fig. 5 is a schematic structural diagram of a vehicle control device according to an embodiment of the present application, and as shown in fig. 5, the vehicle control device 500 includes:
a first determining module 501 configured to determine whether a current power level of the battery is greater than a power level threshold;
a second determining module 502, configured to determine a current driving source of the motor according to a determination result;
A first control module 503 for controlling the state of the second clutch based on the current driving source;
A second control module 504 for controlling a state of the first clutch based on whether a cooling request of the battery and/or the air conditioner is detected, wherein the state includes open and closed.
Optionally, the first control module 503 may be further specifically configured to control the second clutch to be disengaged in response to the current driving source being a battery, and/or to control the second clutch to be engaged in response to the current driving source being an engine.
Optionally, the second control module 504 may also be specifically configured to control the first clutch to close in response to detecting a cooling request and/or to control the first clutch to disengage in response to not detecting a cooling request.
Optionally, the vehicle control device 500 may further include a third control module (not shown) that may be configured to control the battery-driven motor to operate in response to detecting the cooling request after the second clutch is disengaged to apply work to the mechanical compressor coolant, to control the engine-driven motor to operate in response to detecting the cooling request after the second clutch is closed to apply work to the mechanical compressor coolant and to charge the battery after the second clutch is closed, and to control the engine-driven motor to charge the battery in response to not detecting the cooling request.
Optionally, the third control module may be further specifically configured to control the engine driving motor to be in a forward braking state during operation of the engine, and/or to control the engine driving motor to be in an accelerating forward state when the engine start is detected.
Optionally, the third control module may be further specifically configured to control the battery-driven motor to be in an accelerating state when controlling the battery-driven motor to operate.
Optionally, the second determining module 502 may be further specifically configured to determine that the current driving source of the motor is a battery in response to the determination result that the current electric quantity is greater than the electric quantity threshold, and/or determine that the current driving source of the motor is an engine in response to the current electric quantity being less than or equal to the electric quantity threshold.
The vehicle control device provided in this embodiment is configured to execute the technical scheme of the vehicle control method in the foregoing method embodiment, and its implementation principle and technical effects are similar and are not described herein again.
Fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present application, as shown in fig. 6, the vehicle 600 includes:
A processor 611, a memory 612, an interaction interface 613;
The memory 612 is configured to store executable instructions executable by the processor 611, and the processor 611 is configured to execute the technical solution of the vehicle control method provided in the foregoing method embodiment via execution of the executable instructions.
In the above-described vehicle, the processor 611, the memory 612 and the interaction interface 613 are electrically connected directly or indirectly to enable transmission or interaction of data. For example, the elements may be electrically connected to each other via one or more communication buses or signal lines, such as through a bus connection. The memory 612 stores computer-executable instructions for implementing a vehicle control method, including at least one software functional module that may be stored in the memory in the form of software or firmware, and the processor 611 executes various functional applications and data processing by executing software programs and modules stored in the memory 612.
The Memory may be, but is not limited to, random access Memory (Random Access Memory, abbreviated as RAM), read Only Memory (ROM), programmable Read Only Memory (Programmable Read-Only Memory, abbreviated as PROM), erasable Read Only Memory (Erasable Programmable Read-Only Memory, abbreviated as EPROM), electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, abbreviated as EEPROM), etc. The memory is used for storing a program, and the processor executes the program after receiving the execution instruction. Further, the software programs and modules within the memory may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.
The processor may be an integrated circuit chip with signal processing capabilities. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), and the like. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The embodiment of the application also provides a readable storage medium, on which a computer program is stored, which when executed by a processor implements the technical scheme of the vehicle control method provided in the method embodiment.
The embodiment of the application also provides a computer program product, which comprises a computer program, and the technical scheme of the vehicle control method provided in the method embodiment is realized when the computer program is executed by a processor.
Those of ordinary skill in the art will appreciate that all or a portion of the steps of implementing the various method embodiments described above may be implemented by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs the steps comprising the method embodiments described above, and the storage medium described above includes various media capable of storing program code, such as ROM, RAM, magnetic or optical disk.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.