CN107487321B - Clutch control method and device of hybrid electric vehicle - Google Patents

Clutch control method and device of hybrid electric vehicle Download PDF

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Publication number
CN107487321B
CN107487321B CN201710464643.5A CN201710464643A CN107487321B CN 107487321 B CN107487321 B CN 107487321B CN 201710464643 A CN201710464643 A CN 201710464643A CN 107487321 B CN107487321 B CN 107487321B
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mode
electric vehicle
hybrid electric
clutch
determining
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CN107487321A (en
Inventor
鲁倩倩
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Borgward Automotive China Co Ltd
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Borgward Automotive China Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • B60W20/50Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/10Longitudinal speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W2540/00Input parameters relating to occupants
    • B60W2540/12Brake pedal position
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W2710/00Output or target parameters relating to a particular sub-units
    • B60W2710/02Clutches
    • B60W2710/021Clutch engagement state

Abstract

The invention discloses a clutch control method and device of a hybrid electric vehicle, which are used for solving the technical problem that the existing hybrid electric vehicle has low energy recovery rate. The method comprises the following steps: when the hybrid electric vehicle breaks down, determining the current failure mode of the hybrid electric vehicle; determining a target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode; and controlling the clutch of the hybrid electric vehicle according to the target clutch control mode.

Description

Clutch control method and device of hybrid electric vehicle
Technical Field
The disclosure relates to the field of vehicle engineering, in particular to a clutch control method and device of a hybrid electric vehicle.
Background
With the increasing prominence of energy problems and environmental problems, hybrid vehicles are widely popularized due to better dynamic property, fuel economy and emission property. The energy recovery of a hybrid system is critical to its advantage of efficient utilization of energy. Research has shown that in urban driving conditions, approximately 50% or more of the driving energy is lost during braking, and in suburban conditions, at least 20% of the driving energy is lost during braking. Therefore, the braking energy recovery is an effective measure for improving the energy utilization efficiency of the automobile, and has irreplaceable effects on energy conservation and environmental protection of the automobile.
In the existing scheme, the hybrid electric vehicle still has low energy recovery efficiency due to the lack of finer control.
Disclosure of Invention
The disclosure aims to provide a clutch control method and device of a hybrid electric vehicle, which are used for solving the technical problem that the existing hybrid electric vehicle has a low energy recovery rate.
In order to achieve the above object, a first aspect of the present disclosure provides a clutch control method of a hybrid vehicle, including:
when the hybrid electric vehicle breaks down, determining the current failure mode of the hybrid electric vehicle;
determining a target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode;
and controlling the clutch of the hybrid electric vehicle according to the target clutch control mode.
Optionally, the determining the current failure mode of the hybrid vehicle includes:
when the traction TM motor of the hybrid electric vehicle has no fault, the battery has a fault and the engine has a fault, determining that the current fault mode of the hybrid electric vehicle is a forced parking mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining a target clutch control mode corresponding to the forced parking mode as clutch separation control according to the corresponding relation;
the controlling the clutch of the hybrid electric vehicle according to the target clutch control mode comprises the following steps:
and sending a clutch separation command to control the clutch of the hybrid electric vehicle to separate.
Optionally, the determining the current failure mode of the hybrid vehicle includes:
when a TM motor of the hybrid electric vehicle has no fault, a battery has a fault and an engine has no fault, determining that the current fault mode of the hybrid electric vehicle is an engine limp mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining a target clutch control mode corresponding to the forced parking mode as clutch combination control according to the corresponding relation;
the controlling the clutch of the hybrid electric vehicle according to the target clutch control mode comprises the following steps:
and sending a clutch combination command to control the combination of the clutch of the hybrid electric vehicle.
Optionally, the determining the current failure mode of the hybrid vehicle includes:
when a TM motor of the hybrid electric vehicle has no fault, a battery has no fault, an integrated starter and generator ISG has fault and an engine has fault, determining that the current fault mode of the hybrid electric vehicle is a TM motor limp-home mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining a target clutch control mode corresponding to the forced parking mode as clutch separation control according to the corresponding relation;
the controlling the clutch of the hybrid electric vehicle according to the target clutch control mode comprises the following steps:
and sending a clutch separation command to control the clutch of the hybrid electric vehicle to separate.
Optionally, the determining the current failure mode of the hybrid vehicle includes:
when a TM motor, a battery, an ISG motor and an engine of the hybrid electric vehicle have no faults, determining that the current fault mode of the hybrid electric vehicle is a motor or engine limp mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining according to the corresponding relation that when a brake pedal of the hybrid electric vehicle is not stepped on, or when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle is less than a preset speed threshold value, the target clutch control mode is clutch combination control;
and when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle exceeds the preset speed threshold, the target clutch control mode is clutch separation control.
Optionally, the determining the current failure mode of the hybrid vehicle includes:
when a TM motor, a battery, an ISG motor and an engine of the hybrid electric vehicle are in fault, determining that the current fault mode of the hybrid electric vehicle is an engine limp mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining according to the corresponding relation that when a brake pedal of the hybrid electric vehicle is stepped on, or when the brake pedal of the hybrid electric vehicle is not stepped on and the vehicle demand torque of the hybrid electric vehicle is smaller than a preset torque threshold value, the target clutch control mode is clutch separation control;
when the brake pedal of the hybrid electric vehicle is not stepped on and the total vehicle demand torque of the hybrid electric vehicle exceeds the preset torque threshold value, the target clutch control mode is clutch combination control.
A second aspect of the present disclosure provides a clutch control apparatus of a hybrid vehicle, including:
the failure mode determining module is used for determining the current failure mode of the hybrid electric vehicle when the hybrid electric vehicle fails;
the control mode determining module is used for determining a target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode;
and the clutch control module is used for controlling the clutch of the hybrid electric vehicle according to the target clutch control mode.
Optionally, the failure mode determination module is configured to determine that a current failure mode of the hybrid electric vehicle is a forced parking mode when a traction TM motor of the hybrid electric vehicle is not failed, a battery is failed, and an engine is failed;
the control mode determining module is used for determining a target clutch control mode corresponding to the forced parking mode as clutch release control according to the corresponding relation;
and the clutch control module is used for sending a clutch separation instruction to control the separation of the clutch of the hybrid electric vehicle.
Optionally, the failure mode determination module is configured to determine that a current failure mode of the hybrid vehicle is an engine limp home mode when a TM motor of the hybrid vehicle is not failed, a battery is failed, and an engine is not failed;
the control mode determining module is used for determining a target clutch control mode corresponding to the forced parking mode as clutch combination control according to the corresponding relation;
and the clutch control module is used for sending a clutch combination instruction to control the combination of the clutch of the hybrid electric vehicle.
Optionally, the fault mode determination module is configured to determine that a current fault mode of the hybrid vehicle is a TM motor limp home mode when a TM motor of the hybrid vehicle is not faulty, a battery is not faulty, an integrated starter and generator ISG is faulty, and an engine is faulty;
the control mode determining module is used for determining a target clutch control mode corresponding to the forced parking mode as clutch release control according to the corresponding relation;
and the clutch control module is used for sending a clutch separation instruction to control the separation of the clutch of the hybrid electric vehicle.
Optionally, the failure mode determination module is configured to determine that a current failure mode of the hybrid vehicle is a motor or engine limp home mode when a TM motor of the hybrid vehicle is not failed, a battery is not failed, an ISG motor is failed, and an engine is not failed;
the control mode determining module is used for determining, according to the corresponding relation, that when a brake pedal of the hybrid electric vehicle is not stepped on, or when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle is less than a preset speed threshold, the target clutch control mode is clutch combination control; and when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle exceeds the preset speed threshold, the target clutch control mode is clutch separation control.
Optionally, the failure mode determination module is configured to determine that a current failure mode of the hybrid vehicle is an engine limp-home mode when a TM motor of the hybrid vehicle is not failed, a battery is not failed, an ISG motor is not failed, and an engine is failed;
the control mode determining module is used for determining that the target clutch control mode is clutch separation control when a brake pedal of the hybrid electric vehicle is stepped on or the brake pedal of the hybrid electric vehicle is not stepped on and the vehicle demand torque of the hybrid electric vehicle is smaller than a preset torque threshold value according to the corresponding relation; when the brake pedal of the hybrid electric vehicle is not stepped on and the total vehicle demand torque of the hybrid electric vehicle exceeds the preset torque threshold value, the target clutch control mode is clutch combination control.
A third aspect of the present disclosure provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of the first aspect or any of the alternative implementations of the first aspect above.
In the hybrid electric vehicle, the motor is mechanically connected with the engine through the clutch, and the motor can be used as a starter and also can be used as a generator through the combination and separation of the clutch. During limp home energy regeneration, if the clutch remains engaged, the engine and motor may become loaded, causing energy loss. According to the scheme provided by the disclosure, a reasonable clutch control mode is provided for various fault modes, so that the energy feedback efficiency is maximized.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic structural view showing an ISG type series-parallel hybrid vehicle according to an exemplary embodiment;
FIG. 2 is a schematic flow chart illustrating a method of clutch control for a hybrid vehicle according to an exemplary embodiment;
FIG. 3 is a schematic flow chart illustrating another method of clutch control for a hybrid vehicle according to an exemplary embodiment;
FIG. 4 is a schematic structural diagram illustrating a clutch control apparatus of a hybrid vehicle according to an exemplary embodiment;
fig. 5 is a schematic structural diagram showing another clutch control apparatus for a hybrid vehicle according to an exemplary embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In order to make those skilled in the art understand the technical solutions provided by the embodiments of the present disclosure, first, related technical terms are briefly introduced below.
The hybrid electric vehicle refers to a vehicle with a vehicle driving system formed by combining two or more single driving systems capable of running simultaneously, and comprises a series hybrid electric vehicle, a parallel hybrid electric vehicle and a hybrid electric vehicle. It is worth to be noted that the technical solution provided by the embodiment of the present disclosure is applicable to all the three hybrid vehicles.
An Integrated Starter and Generator (ISG) type hybrid vehicle will be described as an example. As shown in fig. 1, fig. 1 is a schematic structural diagram of an ISG type series-parallel hybrid vehicle, and includes an engine 101, an ISG Motor 102, a TM (Traction Motor) Motor 103, a clutch 104, and the like, and connections between the respective components are as shown in the drawing, with solid lines representing mechanical couplings and broken lines representing electrical couplings. The ISG motor 102 is mechanically connected to the engine 101 through the clutch 104, and serves as a starter or a generator for starting the integrated generator. The ISG motor 102 regulates the speed of the engine in the series-parallel mode, and the TM motor 103 serves as a driving motor and a generator in the energy feedback mode.
Fig. 2 is a schematic flowchart of a clutch control method of a hybrid electric vehicle according to an embodiment of the present disclosure. As shown in fig. 2, the method includes:
s201, when the hybrid electric vehicle breaks down, determining the current failure mode of the hybrid electric vehicle.
Specifically, the failure of the hybrid vehicle refers to a failure of any one of a TM motor, a battery, an engine, or an ISG motor of the hybrid vehicle, and the failure mode is determined according to a combination of the failure of the TM motor, the battery, the engine, and the ISG motor.
S202, determining a target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode.
By analyzing the running conditions of the engine, the TM motor and the ISG motor of the hybrid electric vehicle in various fault modes, the clutch control mode in each fault mode can be preset, so that the energy feedback efficiency of the hybrid electric vehicle is maximized.
And S203, controlling the clutch of the hybrid electric vehicle according to the target clutch control mode.
The failure mode and the clutch control method will be described in detail below.
For example, in a possible implementation manner of the embodiment of the present disclosure, the step S201 includes: and when the traction TM motor of the hybrid electric vehicle has no fault, the battery has a fault and the engine has a fault, determining that the current fault mode of the hybrid electric vehicle is a forced parking mode. In this case, it is possible to determine that the target clutch control mode corresponding to the forced parking mode is clutch release control based on the preset correspondence relationship, and to transmit a clutch release command to control clutch release of the hybrid vehicle. The execution main body of the embodiment of the present disclosure may be a VCU (vehicle control Unit), and the vehicle control Unit controls opening and closing of the clutch by sending a command. Under the vehicle forced parking mode, the clutch is separated, and oil quantity saving is facilitated.
In another possible implementation manner of the embodiment of the present disclosure, the step S201 may further include: when the TM motor of the hybrid electric vehicle is not in fault, the battery is in fault and the engine is not in fault, determining that the current fault mode of the hybrid electric vehicle is an engine limp mode. In this case, it is possible to determine that the target clutch control method corresponding to the forced parking mode is clutch engagement control based on the correspondence relationship, and to transmit a clutch engagement command to control clutch engagement of the hybrid vehicle.
In another possible implementation manner of the embodiment of the present disclosure, the step S201 may further include: when a TM motor of the hybrid electric vehicle has no fault, a battery has no fault, an ISG motor has fault and an engine has fault, determining that the current fault mode of the hybrid electric vehicle is a TM motor limp mode; in this case, it is possible to determine that the target clutch control method corresponding to the forced parking mode is clutch release control based on the correspondence relationship, and to transmit a clutch release command to control clutch release of the hybrid vehicle. In the limp mode of the TM motor, if the clutch is engaged, the engine will become loaded, disengaging the clutch, which is beneficial to maximizing energy recovery.
In another possible implementation manner of the embodiment of the present disclosure, the step S201 may further include: and when the TM motor, the battery, the ISG motor and the engine of the hybrid electric vehicle are not in fault, determining that the current fault mode of the hybrid electric vehicle is a motor or engine limp-home mode. In this case, it may be determined from the correspondence that: when a brake pedal of the hybrid electric vehicle is not stepped on, or when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle is less than a preset speed threshold value, the target clutch control mode is clutch combination control; and when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle exceeds the preset speed threshold, the target clutch control mode is clutch separation control. Experiments show that the implementation mode can effectively improve the feedback efficiency of the whole vehicle and achieve better oil saving effect.
In another possible implementation manner of the embodiment of the present disclosure, the step S201 may further include: when the TM motor of the hybrid electric vehicle has no fault, the battery has no fault, the ISG motor has no fault and the engine has fault, determining that the current fault mode of the hybrid electric vehicle is an engine limp mode. In this case, it can be determined according to the corresponding relationship that the target clutch control mode is clutch release control when a brake pedal of the hybrid electric vehicle is stepped on, or when the brake pedal of the hybrid electric vehicle is not stepped on and a vehicle demand torque of the hybrid electric vehicle is smaller than a preset torque threshold; when the brake pedal of the hybrid electric vehicle is not stepped on and the total vehicle demand torque of the hybrid electric vehicle exceeds the preset torque threshold value, the target clutch control mode is clutch combination control. Experiments show that the implementation mode can effectively improve the feedback efficiency of the whole vehicle and achieve better oil saving effect.
In order to make those skilled in the art understand the technical solutions provided by the embodiments of the present disclosure, a method for controlling a clutch of a hybrid vehicle according to the embodiments of the present disclosure is described below by using a detailed example, as shown in fig. 3, the method includes:
s301, determining that the hybrid electric vehicle has a fault and the clutch is in an engaged state.
S302, judging whether the failure mode of the hybrid electric vehicle is an engine or motor limp home mode.
The limp mode of the engine or the motor is a limp mode for controlling the hybrid electric vehicle to enter under the conditions that a TM motor of the hybrid electric vehicle has no fault, a battery has no fault, an ISG motor has fault and the engine has no fault.
Further, if the failure mode of the hybrid vehicle is an engine or motor limp home mode, step S303 is executed; if the failure mode of the hybrid vehicle is not the engine or motor limp home mode, step S307 is executed.
And S303, judging whether the brake pedal of the hybrid electric vehicle is stepped on.
Further, if the brake pedal of the hybrid electric vehicle is not pressed, executing step S304; if the brake pedal of the hybrid vehicle is depressed, step S305 is executed.
And S304, controlling the hybrid electric vehicle to enter limp feedback, and controlling the clutch to keep combined.
And S305, judging whether the speed of the hybrid electric vehicle is less than a preset speed threshold value.
The speed threshold may be calibrated in advance, for example, the speed threshold may be preset to 30 km/h.
Further, if the speed of the hybrid electric vehicle is not less than the preset speed threshold, executing step S304; and if the speed of the hybrid electric vehicle is less than the preset speed threshold value, executing step S306.
And S306, controlling the hybrid electric vehicle to enter limp feedback, and sending a clutch separation instruction to control the clutch to separate.
S307, judging whether the fault mode of the hybrid electric vehicle is a TM motor limp home mode or not.
The TM motor limp mode is a limp mode for controlling the hybrid vehicle to enter under the conditions that the TM motor of the hybrid vehicle is not in fault, the battery is not in fault, the integrated starter and generator ISG is in fault and the engine is in fault.
Further, if the failure mode of the hybrid vehicle is a TM motor limp home mode, executing step S308; if the failure mode of the hybrid vehicle is not the TM motor limp home mode, step S309 is executed.
And S308, sending a clutch separation command to control the separation of the clutch.
S309, judging whether the failure mode of the hybrid electric vehicle is engine limp.
The limp-home mode of the engine is a limp-home mode for controlling the hybrid electric vehicle to enter under the conditions that a TM motor of the hybrid electric vehicle has no fault, a battery has no fault, an ISG motor has no fault, and the engine has a fault.
Further, if the failure mode of the hybrid vehicle is an engine limp home mode, performing step S310; if the failure mode of the hybrid vehicle is not the engine limp home mode, step S311 is executed.
And S310, controlling the clutch to keep combined.
And S311, judging whether the brake pedal of the hybrid electric vehicle is pressed down.
Further, if the brake pedal of the hybrid vehicle is depressed, step S306 is executed. If the brake pedal of the hybrid vehicle is not depressed, step S312 is executed.
And S312, judging whether the required torque of the hybrid electric vehicle is larger than a preset torque threshold value.
The torque threshold may be calibrated, for example, the torque threshold may be preset to 1500 n/m.
Further, if the required torque of the hybrid electric vehicle is greater than a preset torque threshold value, executing step S310; and if the required torque of the hybrid electric vehicle is not greater than the preset torque threshold value, executing step S306.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
By adopting the method, when the hybrid electric vehicle limps to feed back the energy, the clutch is controlled to be combined and separated differently according to different fault modes, so that the energy feedback efficiency of the whole vehicle can be effectively improved, and a better oil-saving effect is achieved.
The disclosed embodiment further provides a clutch control device 40 of a hybrid electric vehicle, where the device 40 may implement a part of a vehicle control unit of the hybrid electric vehicle by software, hardware, or a combination of the two, and is used to implement the clutch control method of the hybrid electric vehicle provided by the foregoing method embodiment, as shown in fig. 4, the device 40 includes:
the failure mode determining module 401 is configured to determine a current failure mode of the hybrid electric vehicle when the hybrid electric vehicle fails;
a control mode determining module 402, configured to determine, according to a preset correspondence between a failure mode and a clutch control mode, a target clutch control mode corresponding to a current failure mode of the hybrid electric vehicle;
and a clutch control module 403, configured to control a clutch of the hybrid vehicle according to the target clutch control manner.
Optionally, the failure mode determining module 401 is configured to determine that a current failure mode of the hybrid vehicle is a forced parking mode when a traction TM motor of the hybrid vehicle is not failed, a battery is failed, and an engine is failed; the control mode determining module 402 is configured to determine, according to the correspondence, that a target clutch control mode corresponding to the forced parking mode is clutch disengagement control; the clutch control module 403 is configured to send a clutch release instruction to control the clutch of the hybrid electric vehicle to release.
Optionally, the failure mode determining module 401 is configured to determine that a current failure mode of the hybrid vehicle is an engine limp home mode when a TM motor of the hybrid vehicle is not failed, a battery is failed, and an engine is not failed; the control mode determining module 402 is configured to determine, according to the correspondence, that a target clutch control mode corresponding to the forced parking mode is clutch engagement control; the clutch control module 403 is configured to send a clutch engagement command to control engagement of a clutch of the hybrid vehicle.
Optionally, the failure mode determination module 401 is configured to determine that a current failure mode of the hybrid vehicle is a TM motor limp home mode when a TM motor of the hybrid vehicle is not failed, a battery is not failed, an integrated starter and generator ISG is failed, and an engine is failed; the control mode determining module 402 is configured to determine, according to the correspondence, that a target clutch control mode corresponding to the forced parking mode is clutch disengagement control; the clutch control module 403 is configured to send a clutch release instruction to control the clutch of the hybrid electric vehicle to release.
Optionally, the failure mode determining module 401 is configured to determine that a current failure mode of the hybrid vehicle is a motor or engine limp home mode when a TM motor of the hybrid vehicle is not failed, a battery is not failed, an ISG motor is failed, and an engine is not failed; the control mode determining module 402 is configured to determine, according to the corresponding relationship, that when a brake pedal of the hybrid electric vehicle is not stepped on, or when the brake pedal of the hybrid electric vehicle is stepped on and a vehicle speed of the hybrid electric vehicle is less than a preset speed threshold, the target clutch control mode is clutch combination control; and when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle exceeds the preset speed threshold, the target clutch control mode is clutch separation control.
Optionally, the failure mode determining module 401 is configured to determine that a current failure mode of the hybrid vehicle is an engine limp home mode when a TM motor of the hybrid vehicle is not failed, a battery is not failed, an ISG motor is not failed, and an engine is failed; the control mode determining module 402 is configured to determine, according to the corresponding relationship, that when a brake pedal of the hybrid electric vehicle is stepped on, or when the brake pedal of the hybrid electric vehicle is not stepped on and a vehicle demand torque of the hybrid electric vehicle is smaller than a preset torque threshold, the target clutch control mode is clutch release control; when the brake pedal of the hybrid electric vehicle is not stepped on and the total vehicle demand torque of the hybrid electric vehicle exceeds the preset torque threshold value, the target clutch control mode is clutch combination control.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
By adopting the device, when the hybrid electric vehicle limps energy to feed back, the clutch is controlled to be combined with and separated from each other differently according to different fault modes, so that the energy feedback efficiency of the whole vehicle can be effectively improved, and a better oil-saving effect is achieved.
Fig. 5 is a block diagram of a clutch control device 500 of a hybrid vehicle according to an embodiment of the present disclosure. Referring to fig. 5, the apparatus 500 comprises a processor 501, which may be one or more in number, and a memory 502 for storing computer programs executable by the processor 501. The computer program stored in memory 502 may include one or more modules that each correspond to a set of instructions. Further, the processor 502 may be configured to execute the computer program to execute the above-described clutch control method of the hybrid vehicle.
Additionally, the apparatus 500 may also include a power component 503 and a communication component 504, the power component 503 may be configured to perform power management of the apparatus 500, and the communication component 504 may be configured to enable communication, e.g., wired or wireless communication, of the apparatus 500. The apparatus 500 may also include an input/output (I/O) interface 505.
In an exemplary embodiment, the memory 502 is configured to store various types of data to support operations at the apparatus 500. Examples of such data include instructions for any application or method operating on the apparatus 500. The memory 502 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
Also, the apparatus 500 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described method of controlling the clutch of the hybrid vehicle.
The disclosed embodiments also provide a non-transitory computer readable storage medium, such as the memory 502, comprising instructions executable by the processor 501 of the apparatus 500 to perform the above-described clutch control method for a hybrid vehicle.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (11)

1. A clutch control method for a hybrid vehicle, characterized by comprising:
when the hybrid electric vehicle breaks down, determining the current failure mode of the hybrid electric vehicle;
determining a target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode;
controlling a clutch of the hybrid electric vehicle according to the target clutch control mode;
the determining of the current failure mode of the hybrid electric vehicle comprises:
when a TM motor, a battery, an ISG motor and an engine of the hybrid electric vehicle have no faults, determining that the current fault mode of the hybrid electric vehicle is a motor or engine limp mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining according to the corresponding relation that when a brake pedal of the hybrid electric vehicle is not stepped on, or when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle is not less than a preset speed threshold value, the target clutch control mode is clutch combination control;
and when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle is less than the preset speed threshold, the target clutch control mode is clutch separation control.
2. The method of claim 1, wherein said determining a current failure mode of said hybrid vehicle comprises:
when the traction TM motor of the hybrid electric vehicle has no fault, the battery has a fault and the engine has a fault, determining that the current fault mode of the hybrid electric vehicle is a forced parking mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining a target clutch control mode corresponding to the forced parking mode as clutch separation control according to the corresponding relation;
the controlling the clutch of the hybrid electric vehicle according to the target clutch control mode comprises the following steps: and sending a clutch separation command to control the clutch of the hybrid electric vehicle to separate.
3. The method of claim 1, wherein said determining a current failure mode of said hybrid vehicle comprises:
when a TM motor of the hybrid electric vehicle has no fault, a battery has a fault and an engine has no fault, determining that the current fault mode of the hybrid electric vehicle is an engine limp mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining a target clutch control mode corresponding to the engine limp mode as clutch combination control according to the corresponding relation;
the controlling the clutch of the hybrid electric vehicle according to the target clutch control mode comprises the following steps: and sending a clutch combination command to control the combination of the clutch of the hybrid electric vehicle.
4. The method of claim 1, wherein said determining a current failure mode of said hybrid vehicle comprises:
when a TM motor of the hybrid electric vehicle has no fault, a battery has no fault, an integrated starter and generator ISG has fault and an engine has fault, determining that the current fault mode of the hybrid electric vehicle is a TM motor limp-home mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining a target clutch control mode corresponding to the TM motor limping mode as clutch separation control according to the corresponding relation;
the controlling the clutch of the hybrid electric vehicle according to the target clutch control mode comprises the following steps: and sending a clutch separation command to control the clutch of the hybrid electric vehicle to separate.
5. The method of claim 1, wherein said determining a current failure mode of said hybrid vehicle comprises:
when a TM motor, a battery, an ISG motor and an engine of the hybrid electric vehicle are in fault, determining that the current fault mode of the hybrid electric vehicle is a dual-motor limp home mode;
the step of determining the target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode comprises the following steps:
determining according to the corresponding relation that when a brake pedal of the hybrid electric vehicle is stepped on, or when the brake pedal of the hybrid electric vehicle is not stepped on and the vehicle demand torque of the hybrid electric vehicle is smaller than a preset torque threshold value, the target clutch control mode is clutch separation control;
when the brake pedal of the hybrid electric vehicle is not stepped on and the total vehicle demand torque of the hybrid electric vehicle exceeds the preset torque threshold value, the target clutch control mode is clutch combination control.
6. A clutch control device for a hybrid vehicle, comprising:
the failure mode determining module is used for determining the current failure mode of the hybrid electric vehicle when the hybrid electric vehicle fails;
the control mode determining module is used for determining a target clutch control mode corresponding to the current fault mode of the hybrid electric vehicle according to the corresponding relation between the preset fault mode and the clutch control mode;
the clutch control module is used for controlling a clutch of the hybrid electric vehicle according to the target clutch control mode;
the fault mode determination module is used for determining that the current fault mode of the hybrid electric vehicle is a motor or engine limp mode when a TM motor of the hybrid electric vehicle has no fault, a battery has no fault, an ISG motor has fault and an engine has no fault;
the control mode determining module is used for determining, according to the corresponding relation, that when a brake pedal of the hybrid electric vehicle is not stepped on, or when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle is not less than a preset speed threshold, the target clutch control mode is clutch combination control; and when the brake pedal of the hybrid electric vehicle is stepped on and the speed of the hybrid electric vehicle is less than the preset speed threshold, the target clutch control mode is clutch separation control.
7. The apparatus of claim 6, wherein the failure mode determination module is configured to determine that a current failure mode of the hybrid vehicle is a forced parking mode when a traction TM motor of the hybrid vehicle is not faulty, a battery is faulty, and an engine is faulty;
the control mode determining module is used for determining a target clutch control mode corresponding to the forced parking mode as clutch release control according to the corresponding relation;
and the clutch control module is used for sending a clutch separation instruction to control the separation of the clutch of the hybrid electric vehicle.
8. The apparatus of claim 6, wherein the failure mode determination module is configured to determine that a current failure mode of the hybrid vehicle is an engine limp home mode when a TM motor of the hybrid vehicle is not faulty, a battery is faulty, and an engine is not faulty;
the control mode determining module is used for determining a target clutch control mode corresponding to the engine limp mode as clutch combination control according to the corresponding relation;
and the clutch control module is used for sending a clutch combination instruction to control the combination of the clutch of the hybrid electric vehicle.
9. The apparatus of claim 6, wherein the failure mode determination module is configured to determine a current failure mode of the hybrid vehicle as a TM motor limp home mode when the TM motor of the hybrid vehicle is not faulty, the battery is not faulty, the Integrated Starter and Generator (ISG) is faulty, and the engine is faulty;
the control mode determining module is used for determining a target clutch control mode corresponding to the TM motor limp mode as clutch separation control according to the corresponding relation;
and the clutch control module is used for sending a clutch separation instruction to control the separation of the clutch of the hybrid electric vehicle.
10. The apparatus of claim 6, wherein the failure mode determination module is configured to determine that a current failure mode of the hybrid vehicle is a dual-motor limp home mode when the TM motor of the hybrid vehicle is not faulty, the battery is not faulty, the ISG motor is not faulty, and the engine is faulty;
the control mode determining module is used for determining that the target clutch control mode is clutch separation control when a brake pedal of the hybrid electric vehicle is stepped on or the brake pedal of the hybrid electric vehicle is not stepped on and the vehicle demand torque of the hybrid electric vehicle is smaller than a preset torque threshold value according to the corresponding relation; when the brake pedal of the hybrid electric vehicle is not stepped on and the total vehicle demand torque of the hybrid electric vehicle exceeds the preset torque threshold value, the target clutch control mode is clutch combination control.
11. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
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