CN113944749A - Method and system for controlling P gear of electric vehicle - Google Patents
Method and system for controlling P gear of electric vehicle Download PDFInfo
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- CN113944749A CN113944749A CN202111163667.XA CN202111163667A CN113944749A CN 113944749 A CN113944749 A CN 113944749A CN 202111163667 A CN202111163667 A CN 202111163667A CN 113944749 A CN113944749 A CN 113944749A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
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Abstract
The embodiment of the application discloses a method and a system for controlling the P gear of an electric automobile; the method comprises the following steps: acquiring a state signal of the electric automobile; obtaining a P gear control instruction according to the state signal; sending the P gear control instruction to a P gear controller so that the P gear controller can carry out safety verification on the P gear control instruction, and executing the P gear control instruction by the P gear controller after the verification is passed; the intelligent degree of the P gear control of the electric automobile is improved.
Description
Technical Field
The invention relates to the field of vehicle control, in particular to a method and a system for controlling a P gear of an electric vehicle.
Background
With the progress of science and technology, automobiles become an important part of people's lives. In the process of driving the vehicle, different control over the vehicle can be achieved through different gears. P range is a common gear in which the vehicle can lock the transmission with a mechanical device to immobilize the vehicle. At present, electric vehicles are gradually popularized, and P-gear control for electric vehicles is also gradually paid attention to. In the prior art, the related control of the P gear of the electric automobile is usually realized according to the driving state of the automobile and a set control strategy; and no proper solution is provided for the risks which may be faced in the control process, so that the intelligence degree of the P gear control of the electric automobile is low.
Disclosure of Invention
In view of this, the present disclosure provides a method and a system for controlling a P-range of an electric vehicle, so as to improve the intelligence of the P-range control of the electric vehicle.
In a first aspect, the present application provides a method for controlling a P range of an electric vehicle, the method comprising:
acquiring a state signal of the electric automobile;
obtaining a P gear control instruction according to the state signal;
and sending the P gear control instruction to a P gear controller so that the P gear controller performs safety verification on the P gear control instruction, and executing the P gear control instruction by the P gear controller after the verification is passed.
In a possible implementation manner, the obtaining the P-range control command according to the status signal includes:
determining the running mode of the electric automobile according to the first state signal;
and obtaining a P gear control instruction according to the running mode and the second state signal.
In one possible embodiment, the operating mode includes:
one of a driving mode, a parking charging mode, and a special mode.
In a possible implementation manner, the operating mode is a special mode, and the obtaining of the P-range control command according to the operating mode and the second status signal includes:
and when a P-gear control instruction of a driver sent by the driver is received, obtaining a corresponding P-gear control instruction according to the P-gear control instruction of the driver.
In one possible embodiment, the status signal comprises a P range lock status signal;
after the acquiring of the state signal of the electric vehicle, the method further comprises:
and storing the data of the state signal of the P gear locking device so as to prevent the data of the state signal of the P gear locking device from being lost after the electric automobile is powered off.
In one possible implementation, after the P range controller executes the P range control command, the method further includes:
and receiving the execution state of the P gear locking device fed back by the P gear controller.
In one possible embodiment, the P range control command includes controlling a P range lock;
before the P-gear controller executes the P-gear control instruction, the method further includes:
the vehicle control unit carries out self-checking, and if the self-checking result is a fault and the P gear control instruction is to control P gear locking, the P gear control instruction is ignored;
and/or
And the P gear controller performs self-checking, and ignores the P gear control instruction if the self-checking result is a fault and the P gear control instruction controls the P gear to be locked.
In a second aspect, the present application provides a system for controlling P-range of an electric vehicle, the system comprising:
the signal acquisition device is used for acquiring a state signal of the electric automobile and sending the state signal to the whole automobile controller;
the vehicle control unit is used for receiving the state signal sent by the signal acquisition device, obtaining a P gear control instruction according to the state signal and sending the P gear control instruction to a P gear controller;
and the P-gear controller is used for carrying out safety verification on the P-gear control command and executing the P-gear control command after the safety verification on the P-gear control command is completed.
In a third aspect, the present application provides an electronic device for controlling a P range of an electric vehicle, where the device includes a processor and a memory, where the memory stores codes, and the processor is configured to call the codes stored in the memory to implement the following functions:
acquiring a state signal of the electric automobile;
obtaining a P gear control instruction according to the state signal;
and sending the P-gear control instruction to a P-gear controller so that the P-gear controller executes the P-gear control instruction after the P-gear controller completes the safety verification of the P-gear control instruction.
In a fourth aspect, the present application provides a computer readable storage medium for storing a computer program for performing any of the above-described methods.
In the embodiment of the application, a P gear control instruction is obtained according to the obtained state signal of the electric automobile, and the P gear control instruction is sent to a P gear controller; and the P-gear controller performs safety verification on the instruction after receiving the P-gear control instruction, and executes the instruction after the verification is passed.
Therefore, the embodiment of the application has the beneficial effect of improving the intelligent degree of the P gear control of the electric automobile. The electric automobile executes P gear control through a P gear controller, and before executing a P gear control instruction, firstly, safety verification is carried out on the instruction; the reliability of the P-gear control command can be improved in the safety verification process, so that the control of the vehicle, which is realized by the P-gear controller executing the command, is in accordance with the real control intention of the driver as much as possible or the current real vehicle condition as much as possible, the risk possibly faced in the P-gear control process is reduced, and the intelligence of the P-gear control is improved.
Drawings
FIG. 1 is a flowchart of a method for controlling P-range of an electric vehicle according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a system for controlling the P range of an electric vehicle according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device for controlling the P range of the electric vehicle according to the embodiment of the present application.
Detailed Description
In order to facilitate understanding and explaining technical solutions provided in the embodiments of the present application, technical terms in the embodiments of the present application will be described below.
P gear: also referred to as park, is typically the gear engaged when the vehicle is parked for an extended period of time. When the vehicle is in the P gear, the transmission part of the vehicle is locked by a mechanical device so that the vehicle cannot move. For example, when the gear shift lever is pushed to the P-range, the parking lock lever is driven to press down the lock pawl by manipulating the shift rocker arm through a shift handle in the transmission, and the lock gear of the transmission is locked by the lock pawl pin and cannot rotate. The P gear control is an important link for guaranteeing the reliable stop of the vehicle to a certain extent.
P gear locking device: the actuator of the P-range parking function is mainly composed of a lock motor, a P-range controller, a position sensor, a lock structure (e.g., a lock pawl), and the like. When a transmission gear of the vehicle is caught by the locking claw, the vehicle cannot move.
The vehicle control unit may be referred to as a VCU for short. The VCU is a relatively central control component of the entire automobile, and may be called a vehicle assembly controller, which is equivalent to the brain of the vehicle. The VCU is used for collecting signals of an accelerator pedal signal, a brake pedal signal and other vehicle components, making corresponding judgment according to the signals, controlling the action of each component controller on the lower layer, realizing the functions of driving, braking, energy recovery and the like of the whole vehicle and playing a role in controlling the running of the vehicle.
In order to facilitate understanding of the technical solutions provided by the embodiments of the present application, a method and a system for controlling a P-gear of an electric vehicle provided by the embodiments of the present application are described below with reference to the accompanying drawings.
While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Other embodiments, which can be derived by those skilled in the art from the embodiments given herein without any inventive contribution, are also within the scope of the present application.
In the claims and specification of the present application and in the drawings accompanying the description, the terms "comprise" and "have" and any variations thereof, are intended to cover non-exclusive inclusions.
In the prior art, the related control of the P gear of the electric automobile is usually realized according to the driving state of the automobile and a set control strategy; and no proper solution is provided for the risks which may be faced in the control process, so that the intelligence degree of the P gear control of the electric automobile is low.
Based on this, in the embodiment of the present application provided by the inventor, a P-range control instruction is obtained according to the obtained state signal of the electric vehicle, and the P-range control instruction is sent to the P-range controller; and the P-gear controller performs safety verification on the instruction after receiving the P-gear control instruction, and executes the instruction after the verification is passed. The electric automobile executes P gear control through a P gear controller, and before executing a P gear control instruction, firstly, safety verification is carried out on the instruction; the reliability of the P-gear control command can be improved in the safety verification process, so that the control of the vehicle, which is realized by the P-gear controller executing the command, is in accordance with the real control intention of the driver as much as possible or the current real vehicle condition as much as possible, the risk possibly faced in the P-gear control process is reduced, and the intelligence of the P-gear control is improved. Therefore, the embodiment of the application has the beneficial effect of improving the intelligent degree of the P gear control of the electric automobile.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for controlling a P-range of an electric vehicle according to an embodiment of the present application.
As shown in fig. 1, the method for controlling the P range of the electric vehicle in the embodiment of the present application includes the following steps:
s101, acquiring a state signal of the electric automobile;
in S101, the electric vehicle is the subject of the P range control; the P gear control refers to P gear related control of the vehicle, and can comprise control of the vehicle in the P gear, control of switching to the P gear, control of switching from the P gear to other gears and the like; the state signal refers to a relevant signal capable of representing the state of the electric vehicle, and the state signal can reflect the partial/whole state of the electric vehicle; the state of the electric vehicle is not limited to the state of the entire electric vehicle, and may include states of components of the electric vehicle, and the like. It should be understood that the above examples of the P range control are only for explaining the P range control, and do not limit the control type included in the P range control, which kind of P range control in the specific implementation process does not affect the implementation of the embodiment of the present application.
S102, obtaining a P gear control instruction according to the state signal;
in S102, a P-range control command is obtained according to the state signal, and the function of the P-range control command is to obtain a P-range control command that matches the intention of the driver or the actual vehicle condition as much as possible. Since the state signal can reflect the whole/partial state of the electric automobile, and the P-gear control command is obtained according to the state signal, the P-gear control command conforms to the intention of a driver or the real automobile condition as much as possible.
S103, the P gear control instruction is sent to a P gear controller, so that the P gear controller carries out safety verification on the P gear control instruction, and the P gear controller executes the P gear control instruction after the verification is passed.
In S103, the P-range control command is sent to a P-range controller dedicated to P-range control, so that the P-range controller executes the P-range control command to complete P-range control, for example, to control the P-range locking device to complete locking/unlocking. Safety verification means that verification is made as to the safety of the P range control command so that the achieved P range control conforms to the true control intention of the driver as much as possible or the current true vehicle condition as much as possible. The reliability of the P-gear control command can be improved in the safety verification process, so that the control of the vehicle, which is realized by the P-gear controller executing the command, is in accordance with the real control intention of the driver as much as possible or the current real vehicle condition as much as possible, the risk possibly faced in the P-gear control process is reduced, and the intelligence of the P-gear control is improved.
Further, in the embodiments S101 to S03 of the present application, the operations may be performed by a vehicle controller of an electric vehicle; in this case, in embodiment S101 of the present application, the state signal may be transmitted to the vehicle control unit after being acquired by another signal acquisition device, or may be acquired by a signal acquisition module in the vehicle control unit.
Further, in the embodiment S101 of the present application, the status signal may include different kinds of signal types. The type of the partial status signal is provided in the embodiment of the present application, but the type of the signal herein does not limit the type of the status signal in the embodiment of the present application. For example, the status signal may include the following categories:
a brake pedal signal derived from the brake pedal, which indicates whether the brake pedal is depressed or not; an accelerator pedal signal derived from an accelerator pedal, which indicates whether the accelerator pedal is stepped on; a gear signal from a gear shift switch, which indicates that the electric vehicle is shifted from the previous gear to the next gear, may contain the current gear type, and the gear type includes an R/N/D/P gear; the speed signal from the speed sensor or the rotating speed sensor comprises the speed information of the electric automobile; the whole vehicle state signal indicates the state of the vehicle, such as the running state, the parking charging state and the like of the vehicle; the P-gear locking device state signal represents the state of the locking device and can comprise locking/unlocking state of a locking claw in the locking device, fault state of the locking device and the like, wherein the fault state can comprise mechanical fault of the locking device, controller fault, communication fault and the like; the locking mechanism position state signal refers to the position of a locking mechanism, such as a locking claw, in the locking device, and may include a locking position, an unlocking position, or other positions; the P-gear controller state signal indicates that the P-gear controller is in a normal working state, the P-gear controller is in a fault state and the like. In addition, the status signal may indicate whether the two statuses are present or not, may be a specific numerical value, or may be in other forms capable of representing the statuses, and the embodiment of the present application is not limited thereto. The status signal may be all of the above signals, or may be a combination of at least one of the above signals, or may be another type of signal. It is understood that the status signal specifically includes the kind of signal, and does not affect the implementation of the embodiment of the present application.
Further, in embodiment S103 of the present application, the safety verification may include performing safety verification on a source of a P-gear control command, that is, verifying the P-gear control command sent by a person, for example, because the vehicle controller sends the P-gear control command to the P-gear controller, the verification of the vehicle controller can reduce, to a certain extent, a phenomenon that a malicious party invades in a command transmission process; the safety verification may further include verification of the contents of the P range control command, thereby reducing the phenomenon of illegal control of the vehicle.
The embodiment of the application provides an implementation mode for safety verification of the P-gear control command. For example, the vehicle control unit sends a P-gear control instruction to the P-gear controller, the data of the P-gear control instruction contains a check code agreed by the vehicle control unit and the P-gear controller in advance, and the P-gear controller completes safety verification on the P-gear control instruction through verification of consistency of the check code; the check code can be real-time interacted through data between the vehicle control unit and the P-gear controller, and the consistency of the check code between the vehicle control unit and the P-gear controller is kept. It can be understood that the above is only one implementation manner provided by the embodiment of the present application, and whether the security verification process for the P-gear control instruction is completed through the above implementation manner does not affect the implementation of the embodiment of the present application.
Further, in embodiment S101 of the present application, the status signal may include a first status signal and a second status signal; the obtaining of the P-range control instruction according to the state signal may include: determining the running mode of the electric automobile according to the first state signal; and obtaining a P gear control instruction according to the running mode and the second state signal.
The first state signal and the second state signal are both state signals of the electric automobile; in the embodiment of the present application, the status signal is divided into the first and second signals only for distinguishing the status signal for determining the operation mode of the electric vehicle from other status signals; the first status signal may be completely different from the second status signal, or may overlap with each other, which is not limited in this application. The operation mode of the electric vehicle refers to a state of the electric vehicle, for example, the first state signal may be the entire vehicle state signal in the above example, or may be another signal; for example, the first status signal for determining the operation mode may be a signal generated by a mechanical device such as a mode button/knob of the vehicle itself, or may be a plurality/kinds of signals for determining the operation mode together.
Furthermore, the operating mode of the electric vehicle can be determined by using the first state signal, and then the P-gear control instruction can be further obtained by using the second state signal and the obtained operating mode. The beneficial effect of such a sequence is that the operating mode of the vehicle is obtained first, and different P-range control strategies may be corresponding to different operating modes, for example, different P-range control strategies may be corresponding to the same second state signal in different operating modes. It should be understood that the above-described implementations are merely examples and are not to be construed as limitations of embodiments of the present application. Further, the operation mode may include: one of a driving mode, a parking charging mode, and a failure mode; it is understood that the operation mode may also include other modes such as an energy saving mode, etc. It can be understood that the specific operation mode is which mode/modes, which does not affect the implementation of the embodiment of the present application.
Further, in the parking charging mode, the P-range control command may be to control the vehicle to automatically enter a P-range locking state, so as to reduce a risk caused by the driver forgetting to perform P-range locking. It can be understood that what specific control strategy is adopted in the above operation mode does not affect the implementation of the embodiment of the present application.
In the embodiment of the present application, two specific implementations of P range control are provided for controlling P range lock. Here, the control of the P range lock means controlling the P range lock means to be in the locked state/enter the locked state.
Firstly, the whole vehicle controller completes the generation of a P gear control command and the transmission to the P gear controller. The electric automobile is in a driving mode, and if the state signals are as follows, the P gear control command corresponds to the P gear locking: the vehicle speed is less than or equal to a preset vehicle speed; the brake pedal signal is active; the accelerator pedal signal is invalid; the gear is switched from the R/N/D gear to the P gear; the working state of the P-gear controller is normal; the whole vehicle system works normally; and secondly, the whole vehicle controller completes the generation of the P-gear control command and the transmission of the P-gear control command to the P-gear controller. When the electric automobile is in a parking charging mode, if the state signal indicates that the working state of the P-gear controller is normal, the P-gear control instruction corresponds to P-gear locking. It can be understood that whether the implementation manner of the above-mentioned P range control is adopted does not affect the implementation of the embodiment of the present application.
Correspondingly, in the embodiment of the application, a specific implementation manner of P-range control is provided for controlling P-range unlocking. The control of the P range unlocking means controlling the P range locking device to be in an unlocked state/enter an unlocked state.
And the whole vehicle controller completes the generation of the P-gear control command and the transmission of the P-gear control command to the P-gear controller. The electric automobile is in a driving mode, and if the state signals are as follows, the P gear control command corresponds to the P gear unlocking: the brake pedal is effective, the accelerator pedal is ineffective, and the gear is switched to the R/N/D gear. It can be understood that whether the implementation manner of the above-mentioned P range control is adopted does not affect the implementation of the embodiment of the present application.
Further, before the P range control executes the P range control instruction, the method may further include: and judging whether the P gear signal meets a preset condition, and if so, executing the P gear control instruction. The P range signal refers to signals related to the P range, such as whether the P range control command passes the safety verification, whether the self-test state of the P range controller is normal, a P range locking mechanism position state signal and the like. The preset conditions may be that the P-range control command passes safety verification, the self-checking state of the P-range controller is normal, and the P-range locking mechanism position state signal conforms to the state corresponding to the P-range control command as much as possible. It can be understood that, before the P-range control executes the P-range control instruction, whether the P-range signal satisfies a preset condition is further determined, and if the P-range signal satisfies the preset condition, the implementation of the embodiment of the present application is not affected by executing the P-range control instruction.
Further, the operating mode is a failure mode, and obtaining a P-range control command according to the operating mode and the second status signal may include: and when a P-gear control instruction of a driver sent by the driver is received, obtaining a corresponding P-gear control instruction according to the P-gear control instruction of the driver.
When the state of the vehicle is determined as the failure mode, the vehicle is in the failure state, and the P-range control performed by the controller of the vehicle itself may not meet the intention of the driver/the actual vehicle condition, or even an accident may occur, and the intervention of the driver may be required. When a P-gear control instruction of a driver is received, the P-gear control instruction is sent by the driver, and the vehicle obtains a corresponding P-gear control instruction according to the P-gear control instruction of the driver.
Further, the P-range control instruction of the driver may be a password received and input by the driver on the interactive interface, or may be a voice collected and sent by the driver and including a preset keyword, or may be in other manners capable of receiving the P-range control instruction of the driver. For example, when a part damage fault is met, the P-gear control is difficult to be carried out through a normal gear switch, and the driver can carry out the P-gear control in a mode of inputting a password. It can be understood that the specific form of the P range control command and the form in which the P range control command is received by the driver do not affect the implementation of the embodiment of the present application.
Further, in embodiment S101 of the present application, the status signal includes a P-range locking device status signal; after the acquiring the state signal of the electric vehicle, the method may further include: and storing the data of the state signal of the P gear locking device so as to prevent the data of the state signal of the P gear locking device from being lost after the electric automobile is powered off.
The P-range lock device state signal indicates a state of the lock device, and may include that a lock claw in the lock device is in a locked/unlocked state, the lock device is in a failure state, and the like; and storing the data of the state signal of the P gear locking device, ensuring that the data is not lost when power is lost, and providing a control basis for the next P gear control. For example, when the communication between the vehicle control unit and the P-range controller is abnormal, the vehicle control unit may obtain a reasonable P-range control command according to data stored inside the vehicle control unit, thereby implementing P-range control. It is understood that the status signal includes a P-range lock status signal; after the state signal of the electric automobile is obtained, whether the data of the state signal of the P gear locking device is stored is further included, so that the data of the state signal of the P gear locking device is not lost after the electric automobile is powered down, and the implementation of the embodiment of the application is not influenced.
Further, in this embodiment of the application, after the P range controller executes the P range control instruction, the method may further include: and receiving the execution state of the P gear locking device fed back by the P gear controller.
The P-gear controller feeds back an executable result after executing the P-gear control instruction; if the P gear control instruction is sent to the P gear controller by the vehicle controller, the P gear control instruction is obtained by the vehicle controller according to the state signal of the electric vehicle; after the P-gear controller executes the instruction, the execution result can be fed back to the vehicle control unit, so that the vehicle control unit executes the control strategy according to the feedback result. When feedback exists, devices/modules in the process form a closed loop, and related control of the P gear is achieved more intelligently. It can be understood that whether to receive the execution state of the P range locking device fed back by the P range controller does not affect the implementation of the embodiment of the present application.
Further, in the present embodiment S103, the P range control command includes controlling P range locking; before the P-range controller executes the P-range control instruction, the method may further include:
the vehicle control unit carries out self-checking, and if the self-checking result is a fault and the P gear control instruction is to control P gear locking, the P gear control instruction is ignored;
and/or
And the P gear controller performs self-checking, and ignores the P gear control instruction if the self-checking result is a fault and the P gear control instruction controls the P gear to be locked.
The vehicle controller is used for realizing a control strategy of the vehicle, and the P gear controller is specially used for finishing control related to the P gear; in the embodiment of the application, the vehicle control unit can obtain the P-gear control instruction according to the state signal and send the P-gear control instruction to the P-gear controller. In order to improve the safety and intelligence of the control, when at least one of the two controllers fails, the P gear control may be in error, so that the instruction of P gear locking is ignored, and P gear unlocking can be executed. It can be understood that whether the P range control is implemented in the above manner does not affect the implementation of the embodiment of the present application.
Further, after the P-range controller executes the P-range control instruction, timeout detection for P-range locking/unlocking may also be included; p-gear locking/unlocking is stopped when a timeout is determined. The failure may result in the P-block lock/unlock being performed all the time but in an incomplete state, and the timeout detection serves to reduce the waste of resources due to the failure. It can be understood that whether to perform timeout detection does not affect the implementation of the embodiment of the present application.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a system for controlling a P-range of an electric vehicle according to an embodiment of the present application, where the system 200 includes:
the signal acquisition device 201 is used for acquiring a state signal of the electric vehicle and sending the state signal to the vehicle control unit;
the vehicle control unit 202 is configured to receive the state signal sent by the signal acquisition device, obtain a P-gear control instruction according to the state signal, and send the P-gear control instruction to a P-gear controller;
and the P-gear controller 203 is used for receiving the P-gear control instruction, performing safety verification on the P-gear control instruction, and executing the P-gear control instruction after the verification is passed.
The devices included in the electric vehicle P-gear control system and the connection relationship between the devices can achieve the same technical effect as the electric vehicle P-gear control method, and are not repeated here to avoid repetition.
Further, in order to implement the functions related to the safety management in the above-mentioned method for controlling the P-range, a safety management module may be provided; the functions of the security management module may include: the method comprises the following steps of vehicle control unit self-checking, P-gear controller self-checking, P-gear locking/unlocking overtime detection, safety verification of P-gear control instructions and control strategies under a fault mode; the security management module may be provided in the corresponding controller. It can be understood that whether the security management module is provided does not affect the implementation of the embodiment of the present application.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an electronic device for controlling the P range of an electric vehicle according to an embodiment of the present application, where the system 300 includes a processor 301 and a memory 302, where the memory 302 stores codes, and the processor 301 is configured to call the codes stored in the memory 302 to implement the following functions:
acquiring a state signal of the electric automobile;
obtaining a P gear control instruction according to the state signal;
and sending the P gear control instruction to a P gear controller so that the P gear controller performs safety verification on the P gear control instruction, and executing the P gear control instruction by the P gear controller after the verification is passed.
The processor and the memory included in the electronic device for controlling the P-gear of the electric vehicle and the connection relationship between the processor and the memory can achieve the same technical effects as the method for controlling the P-gear of the electric vehicle, and are not repeated here to avoid repetition.
In an embodiment of the present application, a computer-readable storage medium is further provided, where the computer-readable storage medium is used for storing a computer program, and the computer program is used for executing the method for controlling the P range of the electric vehicle, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for controlling P gear of an electric vehicle is characterized by comprising the following steps:
acquiring a state signal of the electric automobile;
obtaining a P gear control instruction according to the state signal;
and sending the P gear control instruction to a P gear controller so that the P gear controller performs safety verification on the P gear control instruction, and executing the P gear control instruction by the P gear controller after the verification is passed.
2. The method of claim 1, wherein the status signals comprise a first status signal and a second status signal, and wherein obtaining the P-range control command according to the status signals comprises:
determining the running mode of the electric automobile according to the first state signal;
and obtaining a P gear control instruction according to the running mode and the second state signal.
3. The method of claim 2, wherein the operational mode comprises:
one of a driving mode, a parking charging mode, and a special mode.
4. The method of claim 3, wherein the operating mode is a special mode, and the obtaining the P-range control command according to the operating mode and the second status signal comprises:
and when a P-gear control instruction of a driver sent by the driver is received, obtaining a corresponding P-gear control instruction according to the P-gear control instruction of the driver.
5. The method of claim 1, wherein the status signal comprises a P-range lock status signal;
after the acquiring of the state signal of the electric vehicle, the method further comprises:
and storing the data of the state signal of the P gear locking device so as to prevent the data of the state signal of the P gear locking device from being lost after the electric automobile is powered off.
6. The method of claim 1, after the P range controller executes the P range control command, further comprising:
and receiving the execution state of the P gear locking device fed back by the P gear controller.
7. The method of claim 1, wherein the P range control command comprises controlling a P range lock;
before the P-gear controller executes the P-gear control instruction, the method further includes:
the vehicle control unit carries out self-checking, and if the self-checking result is a fault and the P gear control instruction is to control P gear locking, the P gear control instruction is ignored;
and/or
And the P gear controller performs self-checking, and ignores the P gear control instruction if the self-checking result is a fault and the P gear control instruction controls the P gear to be locked.
8. A system for controlling P gear of an electric vehicle is characterized by comprising:
the signal acquisition device is used for acquiring a state signal of the electric automobile and sending the state signal to the whole automobile controller;
the vehicle control unit is used for receiving the state signal sent by the signal acquisition device, obtaining a P gear control instruction according to the state signal and sending the P gear control instruction to a P gear controller;
and the P-gear controller is used for carrying out safety verification on the P-gear control command and executing the P-gear control command after the safety verification on the P-gear control command is completed.
9. An electronic device for controlling P gear of an electric vehicle is characterized in that the device comprises a processor and a memory, wherein the memory stores codes, and the processor is used for calling the codes stored in the memory to realize the following functions:
acquiring a state signal of the electric automobile;
obtaining a P gear control instruction according to the state signal;
and sending the P-gear control instruction to a P-gear controller so that the P-gear controller executes the P-gear control instruction after the P-gear controller completes the safety verification of the P-gear control instruction.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program for performing the method of any of claims 1 to 7.
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