CN117698690A - Limp control system and method for double-motor hybrid electric vehicle - Google Patents
Limp control system and method for double-motor hybrid electric vehicle Download PDFInfo
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- CN117698690A CN117698690A CN202311742048.5A CN202311742048A CN117698690A CN 117698690 A CN117698690 A CN 117698690A CN 202311742048 A CN202311742048 A CN 202311742048A CN 117698690 A CN117698690 A CN 117698690A
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- 230000007935 neutral effect Effects 0.000 claims description 21
- 239000007858 starting material Substances 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
-
- 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/029—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/029—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
- B60W2050/0292—Fail-safe or redundant systems, e.g. limp-home or backup systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Human Computer Interaction (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a limp control system and a limp control method of a double-motor hybrid electric vehicle, and relates to the technical field of new energy vehicles. Under the parking state, when the high-voltage battery fails, the engine is controlled to work at a certain rotating speed to drive the P2 motor to synchronously rotate, a certain direct-current bus voltage is provided for the P3 motor by utilizing back electromotive force generated by the high-speed rotation of the P2 motor, and the P3 motor is controlled to output a specific torque according to the opening degree of an accelerator, so that the vehicle can also start in a limp way and move at a low speed when no high voltage exists, and traffic jam and safety accidents caused by the fact that the vehicle cannot travel after dangerous road condition failure are avoided.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a limp control system and a limp control method of a double-motor hybrid electric vehicle.
Background
The limp control method of the double-motor hybrid electric vehicle mainly refers to that when the vehicle is in a fault or abnormal condition, the control system can adjust the vehicle to a safe or low-energy-consumption state so as to ensure that the vehicle can continue to run.
Currently, research on limp home control methods for two-motor hybrid vehicles is mainly focused on control strategies and energy management. The control strategy mainly refers to how to intelligently adjust the power output of the internal combustion engine and the motor according to the running state of the vehicle and the requirement of a driver so as to ensure the running safety and the running efficiency of the vehicle. Energy management mainly refers to how to optimize the distribution and use of energy to improve energy utilization efficiency.
In the aspect of limp control, most of the existing limp control methods of the new energy automobiles are emergency control of partial power component faults, such as Chinese patent CN116533982A, chinese patent CN112455425A and Chinese patent CN114889583A. There are also some methods of grading the sudden failure during driving, such as chinese patent CN114379539a and chinese patent CN113844435A. In addition, chinese patent CN115556750a and chinese patent CN115476843a are for a single motor parallel system to use back electromotive force to realize reversing and ensure high voltage accessory operation. For limp control of a dual-motor hybrid vehicle, chinese patent CN105644547a solves a limp control method of a power battery failure during traveling, but does not have a limp control method in a stopped state.
In view of the above, there is a need for a safe and reliable limp control system and method for a dual-motor hybrid vehicle, which can realize limp start and low-speed vehicle moving when a high-voltage battery fails in a stopped state.
Disclosure of Invention
Therefore, the embodiment of the invention provides a limp control system and a limp control method for a double-motor hybrid electric vehicle, which are used for solving the problems that the double-motor hybrid electric vehicle cannot start and move at a low speed when a high-voltage battery of the double-motor hybrid electric vehicle fails in a parking state in the prior art.
In order to solve the above problems, an embodiment of the present invention provides a limp control system of a dual-motor hybrid vehicle, the method including: the device comprises a generator, a clutch, a P2 motor, an AMT gearbox, a P3 motor, a P2 motor controller, a P3 motor controller and a high-voltage battery;
one end of the engine is connected with one end of the P2 motor through the clutch, the engine is used for providing power for a vehicle to drive the vehicle to run, and the clutch is used for transmitting and connecting or disconnecting the power of the engine; the other end of the P2 motor is connected with one end of the P3 motor through the AMT gearbox; the other end of the P3 motor is connected with a driving shaft through a main speed reducer, and the P3 motor is used for providing power for a vehicle and recovering braking energy;
the high-voltage battery is respectively connected with the P2 motor and the P3 motor through the P2 motor controller and the P3 motor controller, and is used for providing electric energy for the P2 motor and the P3 motor;
under a parking state, when a high-voltage battery fails, the engine is controlled to work at a certain rotating speed to drive the P2 motor to synchronously rotate, and back electromotive force generated by high-speed rotation of the P2 motor is utilized to provide power for the P3 motor, so that vehicle limp start and low-speed vehicle moving are realized.
Preferably, a starter is also included for controlling the engine state.
Preferably, the generator, the clutch, the P2 motor, the AMT gearbox and the P3 motor are mechanically connected.
Preferably, the high-voltage battery is electrically connected with the P2 motor and the P3 motor respectively through the P2 motor controller and the P3 motor controller.
The embodiment of the invention also provides a limp control method of the double-motor hybrid electric vehicle, which adopts the limp control system of the double-motor hybrid electric vehicle and specifically comprises the following steps:
when the high-voltage battery fails in a parking state, judging whether the vehicle meets a limp-home condition, if so, controlling the AMT gearbox to return to neutral gear and the clutch to be engaged, and if not, judging again;
judging whether the engine is started or not, if the engine is not started, controlling a starter to start the engine until the engine is in a started state, and if the engine is started, executing the next step;
the engine is controlled to work at a certain rotating speed, the P2 motor is not controlled, the engine drives the P2 motor to synchronously rotate, and the P2 motor generates back electromotive force;
judging whether the generated back electromotive force meets the limp demand, if not, adjusting the rotation speed of the engine until the limp demand is met, and if so, executing the next step;
and controlling the P3 motor to output specific torque according to different throttle opening degrees, and realizing limp start and low-speed vehicle moving of the vehicle.
Preferably, the limp-home condition is that the engine, the P2 motor, and the P3 motor are all fault-free, the clutch can be normally engaged, the AMT gearbox can be engaged in neutral, and the driver has driving intention.
Preferably, the method for controlling the return neutral gear and the clutch engagement of the AMT gearbox specifically comprises the following steps:
the control of the AMT gearbox is as follows: if the AMT gearbox is in a non-neutral gear, controlling the AMT gearbox to return to the neutral gear, and if the AMT gearbox is in the neutral gear, maintaining the neutral gear; the control of the clutch is as follows: if the clutch is in the non-engaged state, the clutch is controlled to be engaged, and if the clutch is in the engaged state, the clutch is kept engaged.
Preferably, the limp demand is that the voltage of the direct current bus of the P3 motor reaches a set threshold.
The embodiment of the invention also provides a double-motor hybrid electric vehicle, which comprises a processor, a memory and a bus system, wherein the processor is connected with the memory through the bus system, the memory is used for storing instructions, and the processor is used for executing the instructions stored by the memory so as to realize the limp control method of the double-motor hybrid electric vehicle.
The embodiment of the invention also provides a computer storage medium which stores a computer software product, wherein the computer software product comprises a plurality of instructions for enabling a piece of computer equipment to execute the limp control method of the double-motor hybrid electric vehicle.
From the above technical scheme, the invention has the following advantages:
the embodiment of the invention provides a limp control system and a limp control method of a double-motor hybrid electric vehicle. Under the parking state, when the high-voltage battery fails, the engine is controlled to work at a certain rotating speed to drive the P2 motor to synchronously rotate, a certain direct-current bus voltage is provided for the P3 motor by utilizing back electromotive force generated by the high-speed rotation of the P2 motor, and the P3 motor is controlled to output a specific torque according to the opening degree of an accelerator, so that the vehicle can also start in a limp way and move at a low speed when no high voltage exists, and traffic jam and safety accidents caused by the fact that the vehicle cannot travel after dangerous road condition failure are avoided.
Drawings
For a clearer description of embodiments of the invention or of solutions in the prior art, reference will be made to the accompanying drawings, which are intended to be used in the examples, for a clearer understanding of the characteristics and advantages of the invention, by way of illustration and not to be interpreted as limiting the invention in any way, and from which, without any inventive effort, a person skilled in the art can obtain other figures. Wherein:
fig. 1 is a block diagram of a limp home control system of a two-motor hybrid vehicle provided in an embodiment;
fig. 2 is a flowchart of a limp control method of a two-motor hybrid vehicle according to an embodiment.
Reference numerals in the specification: 10. a generator; 20. a clutch; 30. a P2 motor; 40. an AMT gearbox; 50. a P3 motor; 60. a P2 motor controller; 70. a P3 motor controller; 80. a high voltage battery; 90. drive shaft, 100, wheels.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
In order to solve the problem that in the prior art, when a high-voltage battery of a double-motor hybrid electric vehicle fails, the vehicle cannot start and move at a low speed in a parking state. As shown in fig. 1, an embodiment of the present invention provides a limp control system for a dual-motor hybrid vehicle, including:
generator 10, clutch 20, P2 motor 30, AMT gearbox 40, P3 motor 50, P2 motor controller 60, P3 motor controller 70, high voltage battery 80;
one end of the engine 10 is connected with one end of the P2 motor 30 through the clutch 20, the engine 01 is used for providing power for a vehicle to drive the vehicle to run, and the clutch 20 is used for transmitting the power of the engine to be engaged or separated; the other end of the P2 motor 30 is connected with one end of the P3 motor 50 through the AMT gearbox 40; the other end of the P3 motor 50 is connected with a driving shaft 90 through a main speed reducer, and the P3 motor 50 is used for providing power for a vehicle and recovering braking energy;
the high-voltage battery 80 is connected with the P2 motor 30 and the P3 motor 50 through the P2 motor controller 60 and the P3 motor controller 70 respectively, and the high-voltage battery 80 is used for providing electric energy for the P2 motor 30 and the P3 motor 50;
in the parking state, when the high-voltage battery 80 fails, the engine 10 is controlled to work at a certain rotation speed to drive the P2 motor 30 to rotate synchronously, and the back electromotive force generated by the high-speed rotation of the P2 motor 30 is utilized to provide power for the P3 motor 50, so that the limp start and low-speed vehicle moving of the vehicle are realized.
As can be seen from the above technical solution, the present invention provides a limp control system of a dual-motor hybrid electric vehicle, which includes a generator 10, a clutch 20, a P2 motor 30, an AMT gearbox 40, a P3 motor 50, a P2 motor controller 60, a P3 motor controller 70, and a high-voltage battery 80. In a parking state, when the high-voltage battery 80 fails, the engine 10 is controlled to work at a certain rotating speed to drive the P2 motor 30 to synchronously rotate, a certain direct current bus voltage is provided for the P3 motor 50 by utilizing a back electromotive force generated by the high-speed rotation of the P2 motor 30, and the P3 motor 50 is controlled to output a specific torque according to the opening degree of an accelerator, so that the vehicle can also limp start and low-speed vehicle moving without high voltage, and traffic jam and safety accidents caused by incapability of driving after dangerous road condition faults are avoided.
In this embodiment, the limp home control system of the two-motor hybrid vehicle further includes a starter for controlling the engine state.
In the present embodiment, the generator 10, the clutch 20, the P2 motor 30, the AMT gearbox 40 and the P3 motor 50 are mechanically connected.
In the present embodiment, the high-voltage battery 80 is electrically connected to the P2 motor 30 and the P3 motor 50 through the P2 motor controller 60 and the P3 motor controller 70, respectively.
In this embodiment, if the high-voltage battery 80 fails and the driver has driving intention in the parking state, the hybrid electric vehicle with the dual-motor architecture controls the AMT gearbox 40 to return to neutral, the clutch 20 to engage, and the starter to start the engine 10, the engine 10 drives the P2 motor 30 to operate at a certain rotation speed, and the counter electromotive force generated by the P2 motor 30 is used to provide a certain dc bus voltage to the P3 motor 50, and the output torque of the P3 motor 50 is controlled according to the opening degree of the accelerator, so that the vehicle can also start in limp-home and move at a low speed when no high voltage exists.
Example two
As shown in fig. 2, the present invention provides a limp control method of a two-motor hybrid vehicle, where the limp control system of the two-motor hybrid vehicle according to the first embodiment of the present invention specifically includes:
when the high-voltage battery 80 fails in the parking state, judging whether the vehicle meets a limp-home condition, if so, controlling the AMT gearbox 40 to return to neutral and the clutch 20 to be engaged, and if not, judging again;
judging whether the engine 10 is started or not, if the engine 10 is not started, controlling a starter to start the engine 10 until the engine 10 is in a started state, and if the engine 10 is started, executing the next step;
the engine 10 is controlled to work at a certain rotating speed, the P2 motor 30 is not controlled, the engine 10 drives the P2 motor 30 to synchronously rotate, and the P2 motor 30 generates back electromotive force;
judging whether the generated back electromotive force meets the limp demand, if not, adjusting the rotation speed of the engine 10 until the limp demand is met, and if so, executing the next step;
the P3 motor 50 is controlled to output specific torque according to different throttle opening degrees, and the vehicle realizes limp start and low-speed vehicle moving.
In the present embodiment, the limp-home condition is that the engine 10, the P2 motor 30, and the P3 motor 50 are all out of order, the clutch 20 can be normally engaged, the AMT gearbox 40 can be engaged in neutral, and the driver has a driving intention.
In this embodiment, the method for controlling the AMT gearbox 40 to return to neutral and the clutch 30 to be engaged specifically includes:
the control of the AMT gearbox 04 is: controlling the AMT gearbox 40 to return to neutral if the AMT gearbox 40 is in a non-neutral state, and maintaining neutral if the AMT gearbox 40 is in a neutral state; the control of the clutch 20 is: the clutch 20 is controlled to be engaged if the clutch 20 is in the non-engaged state, and to remain engaged if the clutch 20 is in the engaged state.
In this embodiment, the limp demand is that the P3 motor 50 dc bus voltage reaches a set threshold.
The above-mentioned limp control system of the two-motor hybrid electric vehicle is adopted in the limp control method of the two-motor hybrid electric vehicle, so that the specific implementation of the limp control method of the two-motor hybrid electric vehicle can be seen from the foregoing embodiment part of the limp control system of the two-motor hybrid electric vehicle, and in order to avoid redundancy, the detailed description is omitted.
Example III
The embodiment of the invention also provides a double-motor hybrid electric vehicle, which comprises a processor, a memory and a bus system, wherein the processor is connected with the memory through the bus system, the memory is used for storing instructions, and the processor is used for executing the instructions stored by the memory so as to realize the limp control method of the double-motor hybrid electric vehicle.
Example IV
The embodiment of the invention also provides a computer storage medium which stores a computer software product, wherein the computer software product comprises a plurality of instructions for enabling a piece of computer equipment to execute the limp control method of the double-motor hybrid electric vehicle.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. A limp home control system for a two-motor hybrid vehicle, comprising: the device comprises a generator, a clutch, a P2 motor, an AMT gearbox, a P3 motor, a P2 motor controller, a P3 motor controller and a high-voltage battery;
one end of the engine is connected with one end of the P2 motor through the clutch, the engine is used for providing power for a vehicle to drive the vehicle to run, and the clutch is used for transmitting and connecting or disconnecting the power of the engine; the other end of the P2 motor is connected with one end of the P3 motor through the AMT gearbox; the other end of the P3 motor is connected with a driving shaft through a main speed reducer, and the P3 motor is used for providing power for a vehicle and recovering braking energy;
the high-voltage battery is respectively connected with the P2 motor and the P3 motor through the P2 motor controller and the P3 motor controller, and is used for providing electric energy for the P2 motor and the P3 motor;
under a parking state, when a high-voltage battery fails, the engine is controlled to work at a certain rotating speed to drive the P2 motor to synchronously rotate, and back electromotive force generated by high-speed rotation of the P2 motor is utilized to provide power for the P3 motor, so that vehicle limp start and low-speed vehicle moving are realized.
2. The limp home control system of a two-motor hybrid vehicle according to claim 1, further comprising a starter for controlling the engine state.
3. The limp home control system of a two-motor hybrid vehicle of claim 1, wherein the generator, clutch, P2 motor, AMT gearbox and P3 motor are mechanically coupled.
4. The limp home control system of a two-motor hybrid vehicle according to claim 1, wherein the high voltage battery is electrically connected to the P2 motor and the P3 motor through a P2 motor controller and a P3 motor controller, respectively.
5. A limp control method of a two-motor hybrid vehicle, characterized in that the method employs the limp control system of a two-motor hybrid vehicle according to any one of claims 1 to 4, comprising:
when the high-voltage battery fails in a parking state, judging whether the vehicle meets a limp-home condition, if so, controlling the AMT gearbox to return to neutral gear and the clutch to be engaged, and if not, judging again;
judging whether the engine is started or not, if the engine is not started, controlling a starter to start the engine until the engine is in a started state, and if the engine is started, executing the next step;
the engine is controlled to work at a certain rotating speed, the P2 motor is not controlled, the engine drives the P2 motor to synchronously rotate, and the P2 motor generates back electromotive force;
judging whether the generated back electromotive force meets the limp demand, if not, adjusting the rotation speed of the engine until the limp demand is met, and if so, executing the next step;
and controlling the P3 motor to output specific torque according to different throttle opening degrees, and realizing limp start and low-speed vehicle moving of the vehicle.
6. The limp home control method of a two-motor hybrid vehicle according to claim 5, wherein the limp home condition is that none of the engine, the P2 motor, and the P3 motor is faulty, the clutch can be normally engaged, the AMT gearbox can be engaged in neutral, and the driver has a driving intention.
7. The method for controlling limp home of a two-motor hybrid vehicle according to claim 5, wherein the method for controlling the return-to-neutral and clutch engagement of the AMT gearbox specifically comprises:
the control of the AMT gearbox is as follows: if the AMT gearbox is in a non-neutral gear, controlling the AMT gearbox to return to the neutral gear, and if the AMT gearbox is in the neutral gear, maintaining the neutral gear; the control of the clutch is as follows: if the clutch is in the non-engaged state, the clutch is controlled to be engaged, and if the clutch is in the engaged state, the clutch is kept engaged.
8. The limp home control method of a two-motor hybrid vehicle according to claim 5, wherein the limp home demand is a P3 motor dc bus voltage reaching a set threshold.
9. A two-motor hybrid vehicle, characterized in that it comprises a processor, a memory and a bus system, the processor and the memory being connected by the bus system, the memory being configured to store instructions, the processor being configured to execute the instructions stored by the memory, to implement the limp control method of the two-motor hybrid vehicle according to any one of claims 5 to 8.
10. A computer storage medium storing a computer software product comprising instructions for causing a computer device to perform the limp home control method of a two-motor hybrid vehicle according to any one of claims 5 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311742048.5A CN117698690A (en) | 2023-12-18 | 2023-12-18 | Limp control system and method for double-motor hybrid electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311742048.5A CN117698690A (en) | 2023-12-18 | 2023-12-18 | Limp control system and method for double-motor hybrid electric vehicle |
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| CN117698690A true CN117698690A (en) | 2024-03-15 |
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| CN202311742048.5A Pending CN117698690A (en) | 2023-12-18 | 2023-12-18 | Limp control system and method for double-motor hybrid electric vehicle |
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| CN (1) | CN117698690A (en) |
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- 2023-12-18 CN CN202311742048.5A patent/CN117698690A/en active Pending
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