CN112428831A - Automobile limping control method and device - Google Patents
Automobile limping control method and device Download PDFInfo
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- CN112428831A CN112428831A CN201910791639.9A CN201910791639A CN112428831A CN 112428831 A CN112428831 A CN 112428831A CN 201910791639 A CN201910791639 A CN 201910791639A CN 112428831 A CN112428831 A CN 112428831A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Transportation (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a method and a device for controlling limping of an automobile, which are applied to the technical field of automobiles, when a motor controller MCU does not receive communication information of a VCU of a vehicle controller in a first preset time, the MCU judges that the VCU has faults, the vehicle enters a limp-home mode, the MCU sends a limp-home instruction to the BMU, and after receiving a response instruction fed back by the BMU, judging whether the vehicle meets the preset vehicle condition, if the vehicle meets the preset vehicle condition, the MCU controls the motor to output the preset torque and controls the vehicle to continue running, when the VCU fails and can not control the vehicle to run continuously, the MCU controls the torque output of the motor to ensure that the vehicle can run continuously in a failure state, so that the user can go home or go to a repair shop to repair the vehicle, and the driving experience of the user is effectively improved.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to an automobile limping control method and device.
Background
The limp automobile means that when an electronic control unit of the automobile breaks down, a standby control loop is started to simply control an engine, so that the automobile can continue to go home or go to a nearby automobile repair plant for repair under the condition that the automobile breaks down.
However, in the prior art, a new energy automobile lacks an effective automobile limping control method, when a vehicle control unit of the new energy automobile fails and cannot work normally, the vehicle control unit can control a system to be powered down to enter a safe state in an emergency, and stops the torque output of a motor, so that the automobile cannot run continuously, and the driving experience of a user is seriously influenced.
In view of the above, it is one of the technical problems to be solved by those skilled in the art to provide a limp home control method and apparatus for an automobile, which can enable a new energy automobile to continue to run when a fault exists, thereby improving the driving experience of a user.
Disclosure of Invention
In view of the above, the present invention provides a method and a device for controlling limping of an automobile, which can enable a new energy automobile to continue to run under a fault condition, so as to improve the driving experience of a user, and the specific scheme is as follows:
in a first aspect, the present invention provides a limp home control method for an automobile, applied to a motor controller MCU, the method comprising:
if the MCU does not receive the communication information of the VCU of the vehicle controller within a first preset time, sending a limping command to a BMU of a battery management system controller (BMU) so that the BMU feeds back a response command after receiving the limping command;
if the MCU receives the response instruction within a second preset time, judging whether the vehicle meets preset vehicle conditions;
if yes, the motor is controlled to output a preset torque.
Optionally, the vehicle limp home control method provided by the first aspect of the present invention further includes:
and if the MCU does not receive the response instruction within a second preset time or the vehicle does not meet the preset vehicle condition, controlling the motor to stop outputting the torque.
Optionally, the controlling the motor to output a preset torque includes:
acquiring the running speed of the vehicle;
inquiring a preset mapping relation, and determining a target torque value matched with the running speed, wherein the preset mapping relation records the corresponding relation between the running speed of the vehicle and the torque of the motor;
and controlling the motor to output the target torque value.
Optionally, the vehicle limp home control method provided by the first aspect of the present invention further includes:
acquiring fault information;
and sending the fault information to the BMU so that the BMU controls the high-voltage main bus relay to be switched off according to the fault information.
Optionally, the preset vehicle condition includes: the braking request is not acquired, the charging loop is not switched on, and the current electric quantity of the power battery is higher than a first preset electric quantity threshold value.
In a second aspect, the present invention provides another limp home control method for a vehicle, applied to a battery management system controller BMU, the method comprising:
acquiring a limping instruction, wherein the limping instruction represents that the motor controller MCU does not receive the communication information of the VCU of the vehicle controller within a first preset time;
and after the limp command is obtained, sending a response command to the MCU, so that the MCU controls the motor to output a preset torque under the condition that the vehicle meets a preset vehicle condition.
Optionally, the second aspect of the present invention provides a limp home control method for an automobile, where the method further includes:
judging whether the vehicle has high-voltage interlocking and/or insulation failure faults or not;
and if so, controlling the high-voltage main bus relay to be disconnected.
Optionally, the second aspect of the present invention provides a limp home control method for an automobile, where the method further includes:
acquiring power mode information and the residual electric quantity of a power battery;
and if the power mode information shows that the vehicle switch is in a closed state and/or the residual electric quantity is lower than a second preset electric quantity threshold value, controlling the high-voltage main bus relay to be switched off.
In a third aspect, the present invention provides a limp home control device for an automobile, applied to a motor controller MCU, the device comprising:
the limp home instruction sending unit is used for sending a limp home instruction to a battery management system (BMU) if the MCU does not receive the communication information of the VCU of the vehicle control unit within a first preset time length, so that the BMU feeds back a response instruction after receiving the limp home instruction;
the judging unit is used for judging whether the vehicle meets the preset vehicle condition or not if the MCU receives the response instruction within a second preset time length;
and the control unit is used for controlling the motor to output the preset torque if the vehicle meets the preset vehicle condition.
In a fourth aspect, the present invention provides another limp home control device for a vehicle, applied to a battery management system controller BMU, the device comprising:
the limp instruction acquisition unit is used for acquiring a limp instruction, and the limp instruction represents that the motor controller MCU does not receive the communication information of the vehicle control unit VCU within a first preset time;
and the response instruction transmitting unit is used for transmitting a response instruction to the MCU after the limp instruction is acquired, so that the MCU controls the motor to output a preset torque under the condition that the vehicle meets a preset vehicle condition.
Based on the technical scheme, the automobile limp control method and the device provided by the invention judge whether the VCU has faults or not through the communication state between the VCU and the MCU, when the MCU does not receive the communication information of the VCU within the first preset time, the MCU judges that the VCU breaks down, the vehicle enters a limp-home mode, the MCU sends a limp-home instruction to the BMU, and after receiving a response instruction fed back by the BMU, judging whether the vehicle meets the preset vehicle condition, if the vehicle meets the preset vehicle condition, the MCU controls the motor to output the preset torque and controls the vehicle to continue running, when the VCU fails and can not control the vehicle to run continuously, the MCU controls the torque output of the motor to ensure that the vehicle can run continuously in a failure state, so that the user can go home or go to a repair shop to repair the vehicle, and the driving experience of the user is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flow chart of a limp home control method for a vehicle according to an embodiment of the invention;
fig. 2 is a block diagram illustrating a limp home control device of an automobile according to an embodiment of the present invention;
fig. 3 is a block diagram of another limp home control device of an automobile according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The applicant researches and discovers that a Control system of a new energy automobile in the prior art mainly comprises a VCU (Vehicle Control Unit, a complete Vehicle controller), an MCU (motor Control Unit, a motor controller) and a BMU (Battery Management Unit, a Battery Management system controller), wherein the VCU is mainly responsible for driver torque analysis and torque Control, the MCU is mainly responsible for controlling torque execution of a motor according to a torque request of the VCU, and the BMU is mainly responsible for monitoring a state of a power Battery and monitoring a working process of the power Battery, and the VCU, the MCU and the BMU communicate with each other through a CAN bus.
When the VCU fails to work normally, if limp home control of the vehicle is to be realized, other devices with control capability are required to replace the VCU to exert the control function, but because the control function of the VCU is the most powerful in the whole vehicle control system, and other devices with control capability can only realize relatively simple control functions, when the VCU fails, the original control function of the VCU needs to be simplified, so that other control devices only share the control function reserved for realizing the limp home function and other necessary control functions, and thus, the limp home control can be realized on the premise of not increasing the hardware investment of the control system and the vehicle cost.
Based on the above basic ideas, an embodiment of the present invention provides a method and an apparatus for controlling a limp home of an automobile, and referring to fig. 1, a flowchart of the method for controlling a limp home of an automobile according to the embodiment of the present invention may include:
and S100, if the MCU does not receive the communication information of the VCU within the first preset time, sending a limping instruction to the BMU.
According to the above, the VCU, the MCU and the BMU communicate with each other through the CAN bus, so that the communication information on the CAN bus CAN be used as a notification signal when the VCU fails to notify other controllers that the VCU has failed.
The VCU judges whether the VCU and sensors which are connected with the VCU and provide various signals for the VCU have faults or not through the diagnostic function of the VCU, such as a vehicle speed sensor, a voltage sensor and the like. If the MCU does not receive the communication information of the VCU within the first preset time period, for example, within 2s, it may be determined that the VCU has failed, and at this time, the MCU sends a limp home instruction to the BMU to notify the BMU that the VCU has failed, and is ready to enter a limp home control state.
In step S110, the BMU receives the limp home instruction and feeds back a response instruction.
After receiving the limp instruction sent by the MCU, the BMU should respond to the limp instruction within a second preset time period, and send a response instruction to the MCU, and inform the MCU that the MCU is ready to enter a limp control state through the response instruction.
In step S120, the MCU determines whether a response command is received within a second preset time period, if so, executes step S130, and if not, executes step S150.
And starting timing after the MCU sends the limp home instruction to the BMU, if a response instruction fed back by the BMU is received within a second preset time length, executing the step S130, otherwise, executing the step S150.
In step S130, the MCU determines whether the vehicle meets a preset vehicle condition, if so, step S140 is executed, otherwise, step S150 is executed.
After receiving the response command sent by the BMU, the MCU needs to acquire the current vehicle condition of the vehicle, and if the current vehicle condition meets the preset vehicle condition, step S140 is executed, and if the current vehicle condition does not meet the preset vehicle condition, that is, the current vehicle condition does not meet the actual condition of entering the limp state, step S150 is executed.
Optionally, the preset vehicle conditions include:
the driver does not take braking action, i.e. the MCU does not get a braking request. Specifically, the MCU needs to monitor a plurality of objects to determine whether a braking request is obtained, such as a specific position of a brake pedal, a pressure change of a master cylinder, an automatic parking state, and an electronic hand brake state. It should be noted that any object that can enable the MCU to determine whether the driver takes the braking action is optional, and the invention also belongs to the protection scope of the present invention.
If the charging gun of the vehicle is in an inserted state, the charging loop is connected, and even if the VCU of the vehicle is judged to have a fault at the moment, the vehicle cannot enter a limp control mode; accordingly, if the charging gun is not inserted, the charging circuit is considered to be not turned on.
The current electric quantity of the power battery is higher than the first preset electric quantity threshold value, optionally, the current electric quantity of the power battery can be obtained through the BMU, and the current electric quantity of the power battery is higher than the first preset electric quantity threshold value, which indicates that the power battery has enough residual electric quantity to support the vehicle to continue to run for a period of time.
It should be noted that the preset vehicle condition may be set in combination with a specific vehicle type, and is not limited to the preset vehicle condition given above, and certainly, the preset vehicle condition does not necessarily include the above three items, and the present invention is only given as a common alternative.
It should be further noted that, whether the vehicle meets the preset vehicle condition is determined, and the vehicle can be determined to meet the preset condition only when the vehicle meets the above three conditions. In the above three items, if one or more items are not satisfied, the vehicle cannot be considered to satisfy the preset vehicle condition.
In step S140, the MCU controls the motor to output a preset torque.
After the vehicle is judged to meet the preset working condition, the MCU controls the motor to output the preset torque, and controls the vehicle to continuously run in a fault state, namely limp control of the vehicle is realized.
Alternatively, after the vehicle enters the limp home mode, an open loop control mode is employed for torque control of the motor. The MCU acquires corresponding vehicle speed information when the vehicle enters a limp home mode, inquires and records a preset mapping relation of the corresponding relation between the vehicle running speed and the motor torque according to the acquired vehicle speed information, determines a torque value matched with the current vehicle speed of the vehicle, and controls the motor to output the target torque value by taking the matched torque value as a target torque value.
It is conceivable that the mentioned preset mapping relationship may be presented in a form of a table, or may be presented in a form of an array, and the specific form of the preset mapping relationship is not limited in the embodiment of the present invention.
It is also conceivable that the vehicle may be in a constant speed running state when the driving force generated by the electric motor is balanced with the resistance encountered by the vehicle, and if the driver takes a braking measure during running and prohibits torque output, the vehicle will run at a reduced speed.
In step S150, the MCU controls the motor to stop torque output.
If the MCU does not receive the response instruction sent by the BMU within the second preset time period or the vehicle does not meet the preset vehicle condition, the vehicle does not have the condition of entering the limp mode, and at the moment, the MCU controls the motor to stop outputting the torque and does not provide the forward power for the vehicle continuously. At this point, the vehicle will decelerate a distance until it stops, and of course, if the driver takes braking action during this process, the vehicle will stop traveling a shorter distance.
According to the vehicle limp control method provided by the embodiment of the invention, after the VCU fails, partial functions of the VCU are taken over, and the torque output of the motor is controlled through the cooperation of the MCU and the BMU, so that the vehicle can continuously run in a failure state, and a driver can smoothly return the vehicle to the home or run to a repair shop to maintain the vehicle even if the VCU fails, and the driving feeling of the driver can be effectively improved.
Further, when the vehicle limps, the vehicle is already in a fault state, so that it is obviously unsafe to simply control the vehicle to continue running in the fault state, the state of the vehicle needs to be monitored, whether the vehicle can continue limping or not is judged, and once the vehicle is judged to have a serious fault, effective measures can be taken to ensure the safety of a driver and the vehicle.
In view of the above situation, according to the automobile limp control method provided by the invention, the MCU can also acquire the fault information of the automobile and send the fault information to the BMU after acquiring the fault information, so that the BMU controls the high-voltage main bus relay to be disconnected after receiving the fault information, thereby cutting off the electric energy supply of the whole automobile and ensuring the safety of the automobile and the driver. Specifically, the high-voltage main bus relay controls the connection between the power battery and the main bus and comprises a main positive relay and a main negative relay, and after the high-voltage main bus relay acts, the motor cannot obtain electric energy supply and cannot output torque.
In the vehicle limp home control method provided by the embodiment of the invention, the BMU can take over part of the control functions of the VCU.
Alternatively, the BMU may power down the vehicle. Specifically, the BMU acquires power mode information and the remaining capacity of the power battery, and determines whether the vehicle needs to be controlled electrically according to the specific conditions of the power mode information and the remaining capacity of the power battery. When the power mode information shows that the vehicle switch is in a closed state or the residual electric quantity of the power battery is lower than a second preset electric quantity threshold value, the BMU controls the high-voltage main bus relay to be disconnected, the power battery is disconnected from the main bus, and power supply is stopped. Of course, when the power mode information shows that the two determination conditions, namely the vehicle switch is in the off state and the power battery residual capacity is lower than the second preset capacity threshold value, are simultaneously met, the BMU also controls the high-voltage main bus relay to be switched off. The BMU may obtain the power mode information from other nodes in the vehicle communication network, and may generally be from a corresponding gateway.
Optionally, the BMU may further determine whether the vehicle has a high-voltage interlock fault or an insulation failure fault, or may determine whether the vehicle has a high-voltage interlock fault and an insulation failure fault at the same time, and if it is determined that the vehicle has a high-voltage interlock fault and/or an insulation failure fault, the BMU may also control the high-voltage main bus relay to be turned off, thereby ensuring the safety of the entire circuit.
By the automobile limp control method provided by the embodiment of the invention, the automobile can continuously run in a fault state. Meanwhile, the fault information of the vehicle can be effectively monitored, serious vehicle faults are timely processed, and the power battery is cut off from a circuit system when necessary, so that the safety of a driver and the safety of the vehicle are guaranteed.
In the following, the vehicle limp home control device provided by the embodiment of the present invention is introduced, and the vehicle limp home control device described below may be regarded as a functional module architecture that needs to be arranged in a central device to implement the vehicle limp home control method provided by the embodiment of the present invention; the following description may be cross-referenced with the above.
Fig. 2 is a block diagram illustrating a limp home control device of an automobile according to an embodiment of the present invention, and referring to fig. 2, the device may include:
the limp home instruction sending unit 10 is configured to send a limp home instruction to a battery management system controller BMU if the MCU does not receive the communication information of the vehicle control unit VCU within a first preset time period, so that the BMU feeds back a response instruction after receiving the limp home instruction;
the judging unit 20 is configured to judge whether the vehicle meets a preset vehicle condition if the MCU receives the response instruction within a second preset time period;
and the control unit 30 is used for controlling the motor to output a preset torque if the vehicle meets the preset vehicle condition.
Fig. 3 is a block diagram illustrating another limp home control device according to an embodiment of the present invention, and referring to fig. 3, the device may include:
the limp instruction obtaining unit 40 is configured to obtain a limp instruction, where the limp instruction indicates that the motor controller MCU does not receive communication information of the vehicle control unit VCU within a first preset time period;
and the response instruction transmitting unit 50 is used for transmitting a response instruction to the MCU after the limp instruction is acquired, so that the MCU controls the motor to output a preset torque under the condition that the vehicle meets a preset vehicle condition.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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 limp home control method of an automobile, which is applied to a Motor Controller (MCU), the method comprising:
if the MCU does not receive the communication information of the VCU of the vehicle controller within a first preset time, sending a limping command to a BMU of a battery management system controller (BMU) so that the BMU feeds back a response command after receiving the limping command;
if the MCU receives the response instruction within a second preset time, judging whether the vehicle meets preset vehicle conditions;
if yes, the motor is controlled to output a preset torque.
2. The automotive limp home control method of claim 1, further comprising:
and if the MCU does not receive the response instruction within a second preset time or the vehicle does not meet the preset vehicle condition, controlling the motor to stop outputting the torque.
3. The automotive limp home control method as claimed in claim 1, wherein the controlling the motor to output a preset torque comprises:
acquiring the running speed of the vehicle;
inquiring a preset mapping relation, and determining a target torque value matched with the running speed, wherein the preset mapping relation records the corresponding relation between the running speed of the vehicle and the torque of the motor;
and controlling the motor to output the target torque value.
4. The automotive limp home control method of claim 1, further comprising:
acquiring fault information;
and sending the fault information to the BMU so that the BMU controls the high-voltage main bus relay to be switched off according to the fault information.
5. The automotive limp home control method of any one of claims 1-4, wherein the preset vehicle conditions include: the braking request is not acquired, the charging loop is not switched on, and the current electric quantity of the power battery is higher than a first preset electric quantity threshold value.
6. A limp home control method for a vehicle, applied to a battery management system controller BMU, the method comprising:
acquiring a limping instruction, wherein the limping instruction represents that the motor controller MCU does not receive the communication information of the VCU of the vehicle controller within a first preset time;
and after the limp command is obtained, sending a response command to the MCU, so that the MCU controls the motor to output a preset torque under the condition that the vehicle meets a preset vehicle condition.
7. The automotive limp home control method of claim 6, further comprising:
judging whether the vehicle has high-voltage interlocking and/or insulation failure faults or not;
and if so, controlling the high-voltage main bus relay to be disconnected.
8. The automotive limp home control method of claim 6, further comprising:
acquiring power mode information and the residual electric quantity of a power battery;
and if the power mode information shows that the vehicle switch is in a closed state and/or the residual electric quantity is lower than a second preset electric quantity threshold value, controlling the high-voltage main bus relay to be switched off.
9. A limp home control device for a motor vehicle, applied to a motor controller MCU, the device comprising:
the limp home instruction sending unit is used for sending a limp home instruction to a battery management system (BMU) if the MCU does not receive the communication information of the VCU of the vehicle control unit within a first preset time length, so that the BMU feeds back a response instruction after receiving the limp home instruction;
the judging unit is used for judging whether the vehicle meets the preset vehicle condition or not if the MCU receives the response instruction within a second preset time length;
and the control unit is used for controlling the motor to output the preset torque if the vehicle meets the preset vehicle condition.
10. A limp home control device for a vehicle, applied to a battery management system controller BMU, the device comprising:
the limp instruction acquisition unit is used for acquiring a limp instruction, and the limp instruction represents that the motor controller MCU does not receive the communication information of the vehicle control unit VCU within a first preset time;
and the response instruction transmitting unit is used for transmitting a response instruction to the MCU after the limp instruction is acquired, so that the MCU controls the motor to output a preset torque under the condition that the vehicle meets a preset vehicle condition.
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| CN201910791639.9A CN112428831A (en) | 2019-08-26 | 2019-08-26 | Automobile limping control method and device |
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| CN201910791639.9A CN112428831A (en) | 2019-08-26 | 2019-08-26 | Automobile limping control method and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113525103A (en) * | 2021-08-17 | 2021-10-22 | 上海洛轲智能科技有限公司 | Control method and device for limp mode of electric automobile, electronic equipment and medium |
| CN113829893A (en) * | 2021-09-26 | 2021-12-24 | 恒大恒驰新能源汽车研究院(上海)有限公司 | Vehicle torque control method and electronic equipment |
| CN114228494A (en) * | 2021-11-25 | 2022-03-25 | 潍柴动力股份有限公司 | Limping control method for fuel cell vehicle |
| CN114379538A (en) * | 2022-02-07 | 2022-04-22 | 中国第一汽车股份有限公司 | Control method and device for vehicle limp mode, vehicle and storage medium |
| CN114379370A (en) * | 2022-02-14 | 2022-04-22 | 中国第一汽车股份有限公司 | Control method and device for vehicle limp mode, vehicle and storage medium |
| CN114506218A (en) * | 2022-01-06 | 2022-05-17 | 山东汽车制造有限公司 | Limping control method of electric automobile |
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