CN113944749B - Method and system for controlling P gear of electric automobile - Google Patents
Method and system for controlling P gear of electric automobile Download PDFInfo
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- CN113944749B CN113944749B CN202111163667.XA CN202111163667A CN113944749B CN 113944749 B CN113944749 B CN 113944749B CN 202111163667 A CN202111163667 A CN 202111163667A CN 113944749 B CN113944749 B CN 113944749B
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The embodiment of the application discloses a method and a system for controlling P gear of an electric automobile; the method comprises the following steps: acquiring a state signal of an electric automobile; obtaining a P-gear control instruction according to the state signal; 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 verification is passed; the intelligent degree of the P gear control of the electric automobile is improved.
Description
Technical Field
The application relates to the field of vehicle control, in particular to a method and a system for controlling P gear of an electric automobile.
Background
With the progress of technology, automobiles are becoming an important part of people's life. During driving of the vehicle, different control of the vehicle can be achieved through different gear positions. The P range is a common gear, when in the P range, the vehicle can lock the transmission using mechanical means so that the vehicle cannot move. Currently, electric vehicles are becoming popular, and P-range control for electric vehicles is also receiving attention. In the prior art, the related control of the P gear of the electric automobile is commonly realized according to the running state of the vehicle and a set control strategy; there is no suitable solution for the risks that may be faced during the control process, so the intelligent degree for the control of the P-gear of the electric automobile is low.
Disclosure of Invention
In view of this, the embodiment of the application provides a method and a system for controlling the P gear of an electric automobile, which are used for improving the intelligent degree of the P gear control of the electric automobile.
In a first aspect, the present application provides a method for controlling P-gear of an electric vehicle, the method comprising:
acquiring a state signal of an 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 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.
In one possible implementation manner, the status signals include a first status signal and a second status signal, and the P-gear control instruction is obtained according to the status signals, including:
determining an operation 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 operation mode includes:
driving mode, parking charging mode, and special mode.
In one possible implementation manner, the operation mode is a special mode, and the obtaining a P-gear control instruction according to the operation mode and the second state signal includes:
and when a driver P-gear control instruction sent by a driver is received, obtaining a corresponding P-gear control instruction according to the driver P-gear control instruction.
In one possible embodiment, the status signal includes a P-range lock-up device status signal;
after the state signal of the electric automobile is acquired, the method further comprises:
and storing the data of the state signal of the P-gear locking device so that the data of the state signal of the P-gear locking device is not lost after the electric automobile is powered down.
In one possible implementation manner, after the P-gear controller executes the P-gear control instruction, 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 P-range locking;
before the P-gear controller executes the P-gear control instruction, the method further includes:
the vehicle controller performs self-checking, and if the self-checking result is a fault and the P-gear control instruction is for controlling the P-gear locking, the P-gear control instruction is ignored;
and/or
And the P-gear controller performs self-checking, and if the self-checking result is a fault and the P-gear control instruction is for controlling the P-gear locking, the P-gear control instruction is ignored.
In a second aspect, the present application provides a system for controlling P-gear 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 vehicle controller;
the whole vehicle controller 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 the P-gear controller;
and the P-gear controller is used for carrying out safety verification on the P-gear control instruction, and executing the P-gear control instruction after finishing the safety verification on the P-gear control instruction.
In a third aspect, the present application provides an electronic device for P-gear control of an electric automobile, where the device includes a processor and a memory, where the memory stores codes, and the processor is configured to invoke the codes stored in the memory to implement the following functions:
acquiring a state signal of an 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 one of the methods described above.
According to the embodiment of the application, a P-gear control instruction is obtained according to the acquired 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 security verification on the P-gear control instruction after receiving the 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 the P-gear controller, and before executing the P-gear control instruction, safety verification is firstly carried out on the instruction; the safety verification process can improve the credibility of the P-gear control instruction, so that the control of the vehicle realized by the P-gear controller executing the instruction, for example, the actual control intention of a driver or the current actual vehicle condition is met 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 flow chart of a method of controlling P gear of an electric vehicle according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a system for controlling P-gear 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 P-gear of an electric automobile according to an embodiment of the present application.
Detailed Description
In order to facilitate understanding and explanation of the technical solution provided by the embodiments of the present application, technical terms in the embodiments of the present application will be described first.
And (3) P grade: also known as park, is typically the gear engaged when the vehicle is parked for a long period of time. When the vehicle is in P range, the transmission of the vehicle is locked by mechanical means so that the vehicle cannot move. For example, when the shift lever is pushed to the P range, the parking lock lever is driven to press down the lock claw by the manipulation of the shift lever in the transmission, and at this time, the lock gear of the transmission is locked against rotation by the lock claw pin. The P gear control is an important link for ensuring the reliable stopping of the vehicle to a certain extent.
P-range locking device: the actuating mechanism of the P-gear parking function mainly comprises a locking motor, a P-gear controller, a position sensor, a locking structure (such as a locking claw) and the like. When the transmission gear of the vehicle is caught by the locking claw, the vehicle cannot move.
The vehicle controller may be simply referred to as VCU. VCU is a relatively central control component of the overall vehicle, known as a vehicle assembly controller, which corresponds 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, and making corresponding judgment according to the signals so as to control actions of the lower component controllers, realize functions of whole vehicle driving, braking, energy recovery and the like, and play a role in controlling the running of the vehicle.
In order to facilitate understanding of the technical scheme provided by the embodiment of the application, the method and the system for controlling the P gear of the electric automobile provided by the embodiment of the 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. Based on the embodiments of the present application, other embodiments that may be obtained by those skilled in the art without making any inventive contribution are within the scope of the application.
In the claims and specification of the application and in the drawings of the specification, the terms "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion.
In the prior art, related control on the P gear of an electric automobile is commonly realized according to the running state of the vehicle and a set control strategy; there is no suitable solution for the risks that may be faced during the control process, so the intelligent degree for the control of the P-gear of the electric automobile is low.
Based on the above, in the embodiment of the application provided by the inventor, according to the acquired state signal of the electric automobile, a P-gear control instruction is obtained, and the P-gear control instruction is sent to the P-gear controller; and the P-gear controller performs security verification on the P-gear control instruction after receiving the instruction, and executes the instruction after the verification is passed. The electric automobile executes P-gear control through the P-gear controller, and before executing the P-gear control instruction, safety verification is firstly carried out on the instruction; the safety verification process can improve the credibility of the P-gear control instruction, so that the control of the vehicle realized by the P-gear controller executing the instruction, for example, the actual control intention of a driver or the current actual vehicle condition is met 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 of a method for controlling P-gear of an electric vehicle according to an embodiment of the application.
As shown in fig. 1, the method for controlling the P gear of the electric automobile in the embodiment of the application comprises the following steps:
s101, acquiring a state signal of an electric automobile;
in S101, the electric vehicle is subject to P-range control; the P range control refers to control related to P range for the vehicle, and may include control achieved by the vehicle being in P range, control achieved by switching to other range from P range, and the like; the state signal refers to a related signal capable of representing the state of the electric automobile, and the state signal can reflect the state of a part/whole of the electric automobile; the state of the electric vehicle is not limited to the state of the entire electric vehicle, and may include the state of each component of the electric vehicle, and the like. It should be understood that the foregoing examples of P-range control are merely for explaining P-range control, and are not limiting of the control types included in P-range control, and do not affect implementation of the embodiments 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 based on the status signal, which serves to obtain a P-range control command that matches the driver' S intention or the actual vehicle condition as much as possible. Since the state signal can reflect the whole/part state of the electric automobile, the P-gear control command is obtained according to the state signal, and therefore, the P-gear control command accords with the intention of a driver or the actual vehicle condition as much as possible.
S103, the P-gear control instruction is sent to the P-gear controller, so that the P-gear controller can conduct safety verification on the P-gear control instruction, and the P-gear controller executes the P-gear control instruction after verification is passed.
In S103, the P-stage control command is sent to a P-stage controller dedicated to P-stage control, so that the P-stage controller executes the P-stage control command to complete P-stage control, for example, to control completion locking/unlocking of the P-stage locking device. Safety verification refers to verification of safety regarding the P-range control instruction so that the implemented P-range control matches as much as possible the actual control intention of the driver or as much as possible the current actual vehicle condition. The safety verification process can improve the credibility of the P-gear control instruction, so that the control of the vehicle realized by the P-gear controller executing the instruction, for example, the actual control intention of a driver or the current actual vehicle condition is met 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 implementation may be performed by a whole vehicle controller of an electric vehicle; in this case, in the embodiment S101 of the present application, the status signal may be collected by another signal collecting device and then sent to the whole vehicle controller, or may be collected by a signal collecting module in the whole vehicle controller.
Further, in the embodiment S101 of the present application, the status signal may include different kinds of signal types. The types of partial status signals are provided in the embodiments of the present application, but the signal types herein do not limit the types of status signals in the embodiments of the present application. For example, the status signals may include the following categories:
a brake pedal signal derived from a brake pedal, which indicates whether the brake pedal is depressed; an accelerator pedal signal derived from an accelerator pedal, which indicates whether the accelerator pedal is depressed; the gear signal from the gear shift switch, which indicates that the electric automobile is changed from the last gear to the next gear, can comprise the current gear type, and the gear type comprises R/N/D/P gears; a vehicle speed signal from a vehicle speed sensor or a rotation speed sensor comprises speed information of the electric vehicle; the 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 status signal, which indicates the status of the locking device, may include that the locking claw in the locking device is in a locked/unlocked state, that the locking device is in a fault state, etc., where the fault state may include a mechanical fault of the locking device, a controller fault, a communication fault, etc.; a latch mechanism position status signal refers to a latch mechanism in a latch device, such as a latch claw, in what position may include a latched position, an unlatched position, or other positions, etc.; the state signal of the P-gear controller 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 represent whether or not two statuses are available, may be a specific numerical value, or may be other forms capable of representing statuses, which is not limited in the embodiment of the present application. The status signals may be all the signals, or may be a combination of at least one of the signals, or may be other kinds of signals. It will be appreciated 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 the embodiment S103 of the present application, the security verification may include performing security verification on the source of the P-gear control command, that is, verifying who sends the P-gear control command, for example, since the whole vehicle controller sends the P-gear control command to the P-gear controller, the verification on the whole vehicle controller can reduce the phenomenon of being invaded by a malicious party in the process of transmitting the command to a certain extent; the security verification may also include verification of the content of the P-range control instruction, 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 instruction. For example, the whole vehicle controller sends a P-gear control instruction to the P-gear controller, the data of the P-gear control instruction contains check codes agreed in advance by the whole vehicle controller and the P-gear controller, and the P-gear controller completes the safety verification of the P-gear control instruction through the verification of the consistency of the check codes; the check code can interact with the P-gear controller in real time through the data between the whole vehicle controller and the P-gear controller, and the consistency of the check code between the whole vehicle controller 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 by the implementation manner does not affect the implementation of the embodiment of the present application.
Further, in the embodiment S101 of the present application, the status signals may include a first status signal and a second status signal; the obtaining the P-gear control instruction according to the status signal may include: determining an operation 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 state signals of the electric automobile; in the embodiment of the application, the state signals are divided into the first and second states, only for distinguishing the state signals for determining the operation mode of the electric automobile from other state 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 the present application. The running mode of the electric automobile refers to a state of the electric automobile, for example, the first state signal may be a whole vehicle state signal in the above example, or may be other signals; for example, the first state 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 of signals for determining the operation mode together.
Further, the operation mode of the electric automobile can be determined by using the first state signal, and then the P-gear control instruction is further obtained by using the second state signal and the obtained operation mode. The advantage of this sequencing is that the vehicle operation mode is obtained first, and different P-gear control strategies may be corresponding to different operation modes, for example, different P-gear control strategies may be corresponding to the same second state signal in different operation modes. It will be appreciated that the above described implementations are by way of example only and are not limiting of embodiments of the application. Further, the operation mode may include: one of a driving mode, a parking charging mode, and a failure mode; it will be appreciated that the operating modes may also include other modes such as energy saving modes and the like. It will be appreciated that the mode or modes of operation, in particular, do not affect the implementation of embodiments of the present application.
Further, in the parking charging mode, the P-gear control command may be to control the vehicle to automatically enter the P-gear locking state, so as to reduce the risk caused by forgetting to perform the P-gear locking by the driver. It will be appreciated that what specific control strategy is adopted in the above-described operation mode does not affect the implementation of the embodiments of the present application.
In the embodiment of the application, two specific implementation modes of P-gear control are provided for controlling P-gear locking. The control of the P-range lock-up here means that the control of the P-range lock-up device is in/into the locked-up state.
First, the whole vehicle controller completes the generation of the P-gear control instruction and the transmission to the P-gear controller. When the electric automobile is in a driving mode, if the state signals are as follows, the P gear control instruction corresponds to P gear locking: the vehicle speed is smaller than or equal to a preset vehicle speed; the brake pedal signal is active; the accelerator pedal signal is inactive; the gear is switched from R/N/D gear to P gear; the working state of the P-gear controller is normal; the whole vehicle system works normally; second, the whole vehicle controller completes the generation of the P-gear control instruction and the transmission to the P-gear controller. When the electric automobile is in a parking charging mode, if the state signal is 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 whether the implementation of P-gear control described above is adopted or not, and the implementation of the embodiment of the present application is not affected.
Correspondingly, in the embodiment of the application, a specific implementation manner of P gear control is also provided for controlling P gear unlocking. Here, controlling the P-range unlock means controlling the P-range lock device to be in/enter an unlocked state.
The whole vehicle controller completes the generation of the P-gear control instruction and the transmission to the P-gear controller. When the electric automobile is in a driving mode, if the state signals are as follows, the P gear control instruction corresponds to P gear unlocking: brake pedal active, accelerator pedal inactive, gear shift to R/N/D gear. It can be understood whether the implementation of P-gear control described above is adopted or not, and the implementation of the embodiment of the present application is not affected.
Further, before the P-gear control executes the P-gear control instruction, the method may further include: judging whether the P-gear signal meets the preset condition, and executing the P-gear control instruction if the P-gear signal meets the preset condition. The P-gear signal refers to a signal related to the P-gear, for example, whether the P-gear control command passes safety verification, whether the self-checking state of the P-gear controller is normal, a P-gear locking mechanism position state signal, and the like. The preset condition may be that the P-gear control instruction passes security verification, the self-checking state of the P-gear controller is normal, and the P-gear locking mechanism position state signal accords with the state corresponding to the P-gear control instruction as far as possible. It can be understood that, before the P-gear control executes the P-gear control instruction, whether the P-gear signal meets a preset condition is further included, and if yes, executing the P-gear control instruction does not affect implementation of the embodiment of the present application.
Further, the operation mode is a fault mode, and the obtaining a P-gear control instruction according to the operation mode and the second state signal may include: and when a driver P-gear control instruction sent by a driver is received, obtaining a corresponding P-gear control instruction according to the driver P-gear control instruction.
When the state in which the vehicle is in is determined as the failure mode, the vehicle is in the failure state, and at this time, the P-range control performed by the controller of the vehicle itself may not meet the intention of the driver/may not meet the actual vehicle condition, or even may be unexpected, and at this time, the intervention of the driver may be required. When a P-gear control instruction of a driver is received, the driver is indicated to send out the instruction for P-gear control, and the vehicle obtains the corresponding P-gear control instruction according to the P-gear control instruction of the driver.
Further, the P-gear control instruction of the driver may be a password input by the driver on the interactive interface, or a voice including a preset keyword sent by the driver may be collected, or other manners capable of receiving the P-gear control instruction of the driver may be adopted. For example, when a part damage failure is encountered, it is difficult to perform P-range control by a normal range switch, and at this time, the driver may perform P-range control by inputting a password. It is understood that the specific form of the P-speed control command, and in which form the driver P-speed control command is received, does not affect the implementation of the embodiments of the present application.
Further, in the embodiment S101 of the present application, the status signal includes a P-gear lock-up device status signal; after the acquiring the state signal of the electric automobile, the method may further include: and storing the data of the state signal of the P-gear locking device so that the data of the state signal of the P-gear locking device is not lost after the electric automobile is powered down.
The P-range locking device status signal refers to a status of the locking device, and may include that a locking claw in the locking device is in a locked/unlocked state, the locking device is in a fault state, etc.; and storing the data of the state signal of the P-gear locking device, and ensuring that the data is not lost when power is lost, thereby providing a control basis for next P-gear control. For example, when the communication between the whole vehicle controller and the P-gear controller is abnormal, the whole vehicle controller can obtain a reasonable P-gear control instruction according to the data stored in the whole vehicle controller, so that P-gear control is realized. It is understood whether the status signal includes a P-range lock-up device status signal; after the state signal of the electric automobile is obtained, whether the state signal of the P-gear locking device is stored or not is further included, so that the state signal of the P-gear locking device is not lost after the electric automobile is powered down, and implementation of the embodiment of the application is not affected.
Further, in the embodiment of the present application, after the P-gear controller executes the P-gear 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 the executable result after executing the P-gear control instruction; if the P-gear control instruction is sent to the P-gear controller by the whole vehicle controller, the P-gear control instruction is obtained by the whole vehicle controller according to a state signal of the electric vehicle; after the P-gear controller executes the instruction, the execution result can be fed back to the whole vehicle controller, so that the whole vehicle controller executes the control strategy according to the feedback result. When feedback exists, the devices/modules in the flow form a closed loop, and the related control on the P gear is realized more intelligently. It can be understood whether the execution state of the P-stage locking device fed back by the P-stage controller is received or not, and the implementation of the embodiment of the present application is not affected.
Further, in the embodiment S103 of the present application, the P-range control instruction includes controlling P-range locking; before the P-gear controller executes the P-gear control instruction, the method may further include:
the vehicle controller performs self-checking, and if the self-checking result is a fault and the P-gear control instruction is for controlling the P-gear locking, the P-gear control instruction is ignored;
and/or
And the P-gear controller performs self-checking, and if the self-checking result is a fault and the P-gear control instruction is for controlling the P-gear locking, the P-gear control instruction is ignored.
The whole vehicle controller is used for realizing a control strategy of the whole vehicle, and the P gear controller is specially used for completing control related to the P gear; in the embodiment of the application, the whole vehicle controller 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 the intelligence of the control, when at least one of the two controllers fails, the P-gear control may be wrong, so that the instruction of the P-gear locking is ignored, and the P-gear unlocking can be performed. It can be appreciated whether P-range control is implemented in the manner described above does not affect the implementation of the embodiments of the present application.
Further, after the P-gear controller executes the P-gear control instruction, timeout detection for P-gear locking/unlocking may be further included; and stopping the locking/unlocking of the P gear when the timeout is determined. The failure may cause the P-range lock/unlock to be performed all the time but in an unfinished state, and the timeout detection has the effect of reducing the resource waste due to the failure. It can be appreciated that whether timeout detection is performed does not affect the implementation of the embodiments of the present application.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a system for controlling P-gear of an electric vehicle according to an embodiment of the application, and the system 200 includes:
the signal acquisition device 201 is used for acquiring a state signal of the electric automobile and sending the state signal to the whole vehicle controller;
the vehicle controller 202 is configured to receive the status signal sent by the signal acquisition device, obtain a P-gear control instruction according to the status signal, and send the P-gear control instruction to a P-gear controller;
and the P-gear controller 203 is configured to receive the P-gear control instruction, perform security verification on the P-gear control instruction, and execute the P-gear control instruction after the P-gear control instruction passes the security verification.
The device and the connection relation between the devices included in the system for controlling the P-gear of the electric automobile can achieve the same technical effects as the method for controlling the P-gear of the electric automobile, and in order to avoid repetition, the description is omitted.
Further, in order to implement the function related to security management in the above-mentioned P-gear control method, a security management module may be provided; the functions of the security management module may include: the method comprises the following steps of self-checking a whole vehicle controller, self-checking a P-gear controller, detecting overtime of locking/unlocking of the P-gear, and performing safety check on a P-gear control instruction; the security management module may be provided in the corresponding controller. It can be understood whether the security management module is set or not, which 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 P-gear 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 invoke the codes stored in the memory 302 to implement the following functions:
acquiring a state signal of an 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 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 processor and the memory included in the electronic device for controlling the P-gear of the electric automobile 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 automobile, and in order to avoid repetition, the description is omitted.
In an embodiment of the present application, a computer readable storage medium is further provided, where the computer readable storage medium is used to store a computer program, where the computer program is used to execute the method for controlling the P-gear of the electric automobile, and the same technical effects can be achieved, and for avoiding repetition, a description is omitted herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or 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 (6)
1. A method for controlling P-gear of an electric vehicle, the method comprising:
acquiring a state signal of the electric automobile, wherein the state signal comprises: a P-range locking device status signal;
storing data of the state signal of the P-gear locking device so that the data of the state signal of the P-gear locking device is not lost after the electric automobile is powered down, wherein the state signal of the P-gear locking device comprises that a locking claw in the P-gear locking device is in a locking state or an unlocking state;
the status signals further include a first status signal and a second status signal;
obtaining a P-gear control instruction according to the state signal, including: determining an operation mode of the electric automobile according to the first state signal; obtaining a P-gear control instruction according to the operation mode and the second state signal, wherein the operation mode comprises: one of a driving mode, a parking charging mode, and a failure mode;
when the operation mode is a fault mode, the P-gear control instruction is obtained according to the operation mode and the second state signal, including: when a driver P-gear control instruction sent by a driver is received, the P-gear control instruction is obtained according to the driver P-gear control instruction;
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 verification is passed;
the security verification for the P-gear control instruction includes: and judging whether the P-gear control instruction is sent by a whole vehicle controller, and if so, passing the safety verification.
2. The method of claim 1, further comprising, after the P-speed controller executes the P-speed control instruction:
and receiving the execution state of the P gear locking device fed back by the P gear controller.
3. The method of claim 1, wherein the P-gear control command includes controlling P-gear lock-up;
before the P-gear controller executes the P-gear control instruction, the method further includes:
the vehicle controller performs self-checking, and if the self-checking result is a fault and the P-gear control instruction is for controlling the P-gear locking, the P-gear control instruction is ignored;
and/or
And the P-gear controller performs self-checking, and if the self-checking result is a fault and the P-gear control instruction is for controlling the P-gear locking, the P-gear control instruction is ignored.
4. A system for P-gear control 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 vehicle controller, and the state signal comprises: the state signal of the P gear locking device further comprises a first state signal and a second state signal;
the safety management module is used for storing data of the state signal of the P-gear locking device 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 state signal of the P-gear locking device comprises that a locking claw in the P-gear locking device is in a locking state or an unlocking state;
the whole vehicle controller 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 the P-gear controller;
the whole vehicle controller is specifically configured to determine an operation mode of the electric vehicle according to the first status signal; obtaining a P-gear control instruction according to the operation mode and the second state signal, wherein the operation mode comprises: one of a driving mode, a parking charging mode, and a failure mode;
the whole vehicle controller is further used for receiving a driver P-gear control instruction sent by a driver when the running mode is in a fault mode, and obtaining the P-gear control instruction according to the driver P-gear control instruction;
the P-gear controller is used for carrying out safety verification on the P-gear control instruction, and executing the P-gear control instruction after finishing the safety verification on the P-gear control instruction;
and carrying out safety verification on the P-gear control instruction, wherein the safety verification comprises the following steps: and judging whether the P-gear control instruction is sent by a whole vehicle controller, and if so, passing the safety verification.
5. The electronic equipment for controlling the P gear of the electric automobile is characterized by comprising 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, wherein the state signal comprises: a P-range locking device status signal;
storing data of the state signal of the P-gear locking device so that the data of the state signal of the P-gear locking device is not lost after the electric automobile is powered down, wherein the state signal of the P-gear locking device comprises that a locking claw in the P-gear locking device is in a locking state or an unlocking state;
the status signals further include a first status signal and a second status signal;
obtaining a P-gear control instruction according to the state signal, including: determining an operation mode of the electric automobile according to the first state signal; obtaining a P-gear control instruction according to the operation mode and the second state signal, wherein the operation mode comprises: one of a driving mode, a parking charging mode, and a failure mode;
when the operation mode is a fault mode, the P-gear control instruction is obtained according to the operation mode and the second state signal, including: when a driver P-gear control instruction sent by a driver is received, the P-gear control instruction is obtained according to the driver P-gear control instruction;
the P-gear control instruction is sent 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;
and carrying out safety verification on the P-gear control instruction, wherein the safety verification comprises the following steps: and judging whether the P-gear control instruction is sent by a whole vehicle controller, and if so, passing the safety verification.
6. A computer readable storage medium, characterized in that the computer readable storage medium is for storing a computer program for executing the method of any one of claims 1 to 3.
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| CN202111163667.XA CN113944749B (en) | 2021-09-30 | 2021-09-30 | Method and system for controlling P gear of electric automobile |
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