Clutch state determination method and device and automatic gearbox control unit

Abstract

The invention discloses a clutch state determination method and device and an automatic gearbox control unit, and belongs to the technical field of vehicles. The method comprises the steps that the rotating speed of a generator of the vehicle, the rotating speed of a driving motor of the vehicle, the current of a clutch of the vehicle and the running speed of the vehicle are obtained; determining a first state of the clutch according to the rotating speed of the generator and the rotating speed of the driving motor; determining a second state of the clutch according to the current of the clutch; and according to the running speed of the vehicle, the first state of the clutch and the second state of the clutch, the state of the clutch is determined. According to the method, the accuracy of the determined clutch state is higher.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of vehicles, in particular to a clutch state determination method and device and automatic transmission control unit. BACKGROUND

[0002] In a vehicle power transmission system, as a key device connecting an engine and a transmission (or other power components), the state of the clutch directly affects the power transmission efficiency, gear shifting smoothness, driving safety and vehicle energy consumption. Accurate and real-time determination of the clutch state is a prerequisite for intelligent control of the transmission, collaborative optimization of the power system and fault diagnosis.

[0003] In related technologies, the average of the engine speed and the generator speed is taken as the speed of the left end of the clutch, the speed of the driving motor is taken as the speed of the right end of the clutch, the difference between the speed of the left end of the clutch and the speed of the right end of the clutch is determined, and the state of the clutch is determined based on the difference.

[0004] However, due to the large fluctuation of the engine speed, the accuracy of the determined speed of the left end of the clutch is poor, and thus the accuracy of the determined state of the clutch is poor. SUMMARY

[0005] Embodiments of the present application provide a clutch state determination method, device and automatic transmission control unit, which can be used to solve the problems in related technologies. The technical solution is as follows:

[0006] In one aspect, the embodiments of the present application provide a clutch state determination method, which comprises:

[0007] obtaining the speed of a generator of a vehicle, the speed of a driving motor of the vehicle, the current of a clutch of the vehicle and the driving speed of the vehicle;

[0008] determining a first state of the clutch according to the speed of the generator and the speed of the driving motor;

[0009] determining a second state of the clutch according to the current of the clutch;

[0010] determining the state of the clutch according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch.

[0011] In one possible implementation, the determination of the first state of the clutch according to the speed of the generator and the speed of the driving motor comprises:

[0012] determining the speed difference between the speed of the generator and the speed of the driving motor;

[0013] determining a first state of the clutch according to the rotational speed difference value.

[0014] In a possible implementation, the first state of the clutch includes a closed state, an open state and a control state.

[0015] The determining the first state of the clutch according to the rotational speed difference value includes:

[0016] In a case where the rotational speed difference value is greater than a first rotational speed, determining the first state of the clutch as the open state.

[0017] In a case where the rotational speed difference value is less than a second rotational speed, determining the first state of the clutch as the closed state, the second rotational speed being less than the first rotational speed.

[0018] In a case where the rotational speed difference value is not less than the second rotational speed and not greater than the first rotational speed, determining the first state of the clutch as the control state.

[0019] In a possible implementation, the second state of the clutch includes a closed state, an open state and a pre-charge state.

[0020] The determining the second state of the clutch according to the current of the clutch includes:

[0021] In a case where the current of the clutch is greater than a first current, determining the second state of the clutch as the closed state.

[0022] In a case where the current of the clutch is less than a second current, determining the second state of the clutch as the open state, the second current being less than the first current.

[0023] In a case where the current of the clutch is not less than the second current and not greater than the first current, determining the second state of the clutch as the pre-charge state.

[0024] In a possible implementation, the determining the state of the clutch according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch includes:

[0025] In a case where the driving speed of the vehicle is less than a driving speed threshold, determining the second state of the clutch as the state of the clutch.

[0026] In a case where the driving speed of the vehicle is not less than the driving speed threshold, determining the state of the clutch according to the current of the clutch, the first state of the clutch and the second state of the clutch.

[0027] In a possible implementation, the determining the state of the clutch according to the current of the clutch, the first state of the clutch and the second state of the clutch comprises:

[0028] In a case where the current of the clutch is less than a third current, the second state of the clutch is determined as the state of the clutch.

[0029] In a case where the current of the clutch is not less than the third current, the first state of the clutch is determined as the state of the clutch.

[0030] In a possible implementation, after the determining the state of the clutch according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch, the method further comprises:

[0031] receiving a gear position of a gearbox of the vehicle sent by a vehicle controller of the vehicle;

[0032] in a case where the gear position of the gearbox is 0 gear, the state of the clutch is a closed state or a control state, and the current of the clutch is greater than a fourth current, controlling the clutch to open;

[0033] in a case where the gear position of the gearbox is changed from 1 gear to 0 gear, the state of the clutch is the closed state, and the current of the clutch is greater than a fifth current, the fifth current being less than the fourth current, controlling the clutch to open.

[0034] In another aspect, an embodiment of the present application provides a determination device for a state of a clutch, the device comprising:

[0035] a obtaining module, configured to obtain a rotating speed of a generator of a vehicle, a rotating speed of a driving motor of the vehicle, a current of the clutch of the vehicle and a driving speed of the vehicle;

[0036] a determining module, configured to determine a first state of the clutch according to the rotating speed of the generator and the rotating speed of the driving motor;

[0037] the determining module is further configured to determine a second state of the clutch according to the current of the clutch;

[0038] the determining module is further configured to determine the state of the clutch according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch.

[0039] In a possible implementation, the determining module is configured to determine a rotating speed difference between the rotating speed of the generator and the rotating speed of the driving motor, and determine the first state of the clutch according to the rotating speed difference.

[0040] In a possible implementation, the first state of the clutch includes a closed state, an open state and a control state.

[0041] The determining module is configured to determine the first state of the clutch as the open state when the rotational speed difference is greater than a first rotational speed; determine the first state of the clutch as the closed state when the rotational speed difference is less than a second rotational speed, the second rotational speed being less than the first rotational speed; and determine the first state of the clutch as the control state when the rotational speed difference is not less than the second rotational speed and not greater than the first rotational speed.

[0042] In a possible implementation, the second state of the clutch includes a closed state, an open state and a pre-charge state.

[0043] The determining module is configured to determine the second state of the clutch as the closed state when the current of the clutch is greater than a first current; determine the second state of the clutch as the open state when the current of the clutch is less than a second current, the second current being less than the first current; and determine the second state of the clutch as the pre-charge state when the current of the clutch is not less than the second current and not greater than the first current.

[0044] In a possible implementation, the determining module is configured to determine the second state of the clutch as the state of the clutch when the driving speed of the vehicle is less than a driving speed threshold; and determine the state of the clutch according to the current of the clutch, the first state of the clutch and the second state of the clutch when the driving speed of the vehicle is not less than the driving speed threshold.

[0045] In a possible implementation, the determining module is configured to determine the second state of the clutch as the state of the clutch when the current of the clutch is less than a third current; and determine the first state of the clutch as the state of the clutch when the current of the clutch is not less than the third current.

[0046] In a possible implementation, the apparatus further includes:

[0047] The receiving module is configured to receive the gear of the gearbox of the vehicle sent by the vehicle controller.

[0048] The control module is configured to control the clutch to open when the gear of the gearbox is 0 gear, the state of the clutch is the closed state or the control state, and the current of the clutch is greater than a fourth current.

[0049] The control module is further configured to, in a case where the gear of the gearbox is changed from 1st gear to 0th gear, the state of the clutch is the closed state, and the current of the clutch is greater than a fifth current, control the clutch to be opened, the fifth current being less than the fourth current.

[0050] In another aspect, the embodiments of the present application provide an automatic gearbox control unit, comprising a processor and a memory, the memory storing at least one program code, the at least one program code being loaded and executed by the processor to implement the clutch state determination method described above.

[0051] In another aspect, a vehicle is also provided, comprising an automatic gearbox control unit configured to implement the clutch state determination method described above.

[0052] The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

[0053] The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0055] Figure 1 is an implementation environment diagram of a clutch state determination method provided by the embodiments of the present application;

[0056] Figure 2 is a flowchart of a clutch state determination method provided by the embodiments of the present application;

[0057] Figure 3 is a flowchart of a clutch state determination method provided by the embodiments of the present application;

[0058] Figure 4is a structural schematic diagram of a clutch state determination device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0059] To make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0060] It should be noted that the terms "first", "second", and the like in the present application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0061] Figure 1 is a schematic diagram of an implementation environment of a clutch state determination method provided by an embodiment of the present application, as Figure 1 shown, the implementation environment includes a vehicle 101, and the vehicle 101 includes an automatic transmission control unit (TCU) 102. The automatic transmission control unit 102 is configured to execute the clutch state determination method provided by the embodiments of the present application.

[0062] The vehicle 101 can be a new energy vehicle. The new energy vehicle includes a pure electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, and a fuel cell vehicle. The pure electric vehicle is a vehicle that is powered only by a battery and is driven by an electric motor. The hybrid vehicle has both a gasoline engine and an electric motor, which can work together. The plug-in hybrid vehicle has a larger battery capacity and can be externally charged, and has a longer pure electric cruising range. The fuel cell vehicle drives the vehicle by generating electricity through the reaction of hydrogen and oxygen, and the emission is water.

[0063] The automatic transmission control unit 102 is the core of the automatic transmission system, responsible for accurately controlling the shift logic, oil pressure regulation, power transmission and other core functions of the transmission, directly affecting the smoothness, power and fuel economy of the vehicle.

[0064] The embodiments of the present application provide a clutch state determination method, which can be applied to the implementation environment shown in Figure 1 , and the flowchart of the clutch state determination method provided by the embodiments of the present application is shown in Figure 2 , for example. The method can be executed by the automatic transmission control unit 102 in the vehicle 101 in Figure 1 . As Figure 2As shown, the method comprises steps 201 to 204.

[0065] In step 201, the rotational speed of the generator of the vehicle, the rotational speed of the drive motor of the vehicle, the current of the clutch of the vehicle, and the driving speed of the vehicle are acquired.

[0066] In a possible implementation, the vehicle comprises a generator, a drive motor, a solenoid valve, and a speed sensor. The generator is used to convert mechanical energy (such as power output by an engine or kinetic energy recovered by vehicle braking) into electrical energy, to charge a battery pack or directly power a drive motor and vehicle electrical appliances. The drive motor is used to convert electrical energy (from a battery or a generator) into mechanical energy, to directly drive vehicle driving, and is one of the core power sources of an electric vehicle / hybrid vehicle. The solenoid valve is an execution element of an electronic control system, which receives an electrical signal from an electronic control unit, controls the opening degree or on-off state of the valve, adjusts the on-off state and pressure of hydraulic oil / gas pressure, and finally realizes mechanical action control (such as closing / opening of a clutch and gear shifting) of components such as a clutch and a transmission. The speed sensor is used to acquire the driving speed of the vehicle in real time.

[0067] The automatic transmission control unit is in communication connection with the generator through a wired network or a wireless network. The generator sends the rotational speed of the generator to the automatic transmission control unit, so that the automatic transmission control unit acquires the rotational speed of the generator.

[0068] The automatic transmission control unit is in communication connection with the drive motor through a wired network or a wireless network. The drive motor sends the rotational speed of the drive motor to the automatic transmission control unit, so that the automatic transmission control unit acquires the rotational speed of the drive motor.

[0069] The automatic transmission control unit is in communication connection with the solenoid valve through a wired network or a wireless network. The solenoid valve sends the current of the clutch to the automatic transmission control unit, so that the automatic transmission control unit acquires the current of the clutch.

[0070] The automatic transmission control unit is in communication connection with the speed sensor through a wired network or a wireless network. The speed sensor sends the driving speed of the vehicle to the automatic transmission control unit, so that the automatic transmission control unit acquires the driving speed of the vehicle.

[0071] In step 202, the first state of the clutch is determined according to the rotational speed of the generator and the rotational speed of the drive motor.

[0072] In a possible implementation, the process of determining the first state of the clutch according to the rotational speed of the generator and the rotational speed of the drive motor comprises: determining a rotational speed difference between the rotational speed of the generator and the rotational speed of the drive motor; and determining the first state of the clutch according to the rotational speed difference.

[0073] In this implementation, the first state of the clutch is determined by determining the speed difference between the speed of the generator and the speed of the driving motor, which can directly determine the motion synchronization of the two, and accurately control the state of the clutch.

[0074] Optionally, the speed difference between the speed of the generator and the speed of the driving motor is used as the speed difference.

[0075] Optionally, the first state of the clutch includes a closed state, an open state, and a control state. When the first state of the clutch is the closed state, the driving end (such as the engine or the click output shaft) and the driven end (such as the transmission input shaft) of the clutch are completely combined, and the power is transmitted without loss (or with minimal friction). When the first state of the clutch is the open state, the driving end and the driven end of the clutch are completely disconnected, and no power is transmitted. When the first state of the clutch is the control state, the clutch is in the combination process (from pre-charge to closure) or semi-combination state, and the combination degree is controlled by real-time adjustment of the current (or pressure), so as to realize smooth power transmission.

[0076] In one possible implementation, according to the speed difference, the process of determining the first state of the clutch includes: when the speed difference is greater than a first speed, determining that the first state of the clutch is the open state; when the speed difference is less than a second speed, determining that the first state of the clutch is the closed state, and the second speed is less than the first speed; and when the speed difference is not less than the second speed and not greater than the first speed, determining that the first state of the clutch is the control state.

[0077] The first speed and the second speed are both set based on experience, or are flexibly adjusted according to the implementation environment, which is not limited in the embodiments of the present application. For example, the first speed is 200 rpm (Revolutions Per Minute), and the second speed is 20 rpm.

[0078] In this implementation, the first state of the clutch is determined according to the speed difference in different intervals. By setting the first speed and the second speed to form a buffer interval, the clutch can be opened in time when the speed difference is too large to avoid impact and wear caused by hard connection, and the clutch can be closed when the speed difference is small enough to ensure efficient power transmission. The control state in the middle can dynamically adjust the combination degree to realize smooth transition from separation to closure, so as to balance the safety of system operation, the smoothness of power transmission, and the efficiency of energy conversion, and improve the accuracy and reliability of overall control.

[0079] In step 203, the second state of the clutch is determined according to the current of the clutch.

[0080] In a possible implementation, the second state of the clutch includes a closed state, an open state and a pre-charge state. The second state of the clutch is the pre-charge state, which means that the clutch is in a transition preparation state between the open state and the closed state, and is ready for quick combination to avoid impact or delay during combination.

[0081] Optionally, the process of determining the second state of the clutch according to the current of the clutch includes: determining the second state of the clutch as the closed state when the current of the clutch is greater than a first current; determining the second state of the clutch as the open state when the current of the clutch is less than a second current, the second current being less than the first current; and determining the second state of the clutch as the pre-charge state when the current of the clutch is not less than the second current and not greater than the first current.

[0082] The first current and the second current are both set based on experience or are flexibly adjusted according to an implementation environment, which is not limited in the embodiments of the present application. For example, the first current is 500 milliampere (mA) and the second current is 200 mA.

[0083] In this implementation, the way of determining the second state of the clutch according to the current partition interval, by setting the first current and the second current to form a transition interval, can ensure that the clutch is reliably closed to transmit power when the current is large enough, and can ensure that the clutch is completely opened to cut off power when the current is small; the pre-charge state in the middle can prepare for combination of the clutch through accurate control of the current, reducing impact and response delay during state switching, so as to balance the reliability of power transmission, the completeness of cutting off and the smoothness of state conversion, and improve the stability and refinement of system control.

[0084] In step 204, the state of the clutch is determined according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch.

[0085] In a possible implementation, the process of determining the state of the clutch according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch includes: determining the second state of the clutch as the state of the clutch when the driving speed of the vehicle is less than a driving speed threshold; and determining the state of the clutch according to the current of the clutch, the first state of the clutch and the second state of the clutch when the driving speed of the vehicle is not less than the driving speed threshold.

[0086] The driving speed threshold is set based on experience or is flexibly adjusted according to an implementation environment, which is not limited in the embodiments of the present application. For example, the driving speed threshold is 20 kilometers per hour.

[0087] In the implementation, when the driving speed of the vehicle is less than the driving speed threshold, the vehicle does not enter the parallel connection, and it is unreasonable to take the first state of the clutch as the state of the clutch, and thus the second state of the clutch is taken as the state of the clutch. When the driving speed of the vehicle is not less than the driving speed threshold, the state of the clutch is determined based on the current of the clutch, the first state of the clutch and the second state of the clutch, so that the determination of the state of the clutch is more reasonable and more accurate.

[0088] Optionally, the process of determining the state of the clutch based on the current of the clutch, the first state of the clutch and the second state of the clutch includes: determining the second state of the clutch as the state of the clutch when the current of the clutch is less than a third current; and determining the first state of the clutch as the state of the clutch when the current of the clutch is not less than the third current.

[0089] The third current is set based on experience or flexibly adjusted according to an implementation environment, and embodiments of the present application do not limit this. For example, the third current is 200 milliamps.

[0090] In the implementation, when the driving speed of the vehicle is greater than the driving speed threshold and the current of the clutch is less than the third current, it is considered that the clutch is in the opening stage, and thus the second state of the clutch is still taken as the state of the clutch. When the driving speed of the vehicle is greater than the driving speed threshold and the current of the clutch is not less than the third current, the first state of the clutch is taken as the state of the clutch, so that the determination of the state of the clutch is more reasonable and more accurate.

[0091] In a possible implementation, after the state of the clutch is determined, a gear position of a gearbox of the vehicle sent by a hybrid control unit (HCU) of the vehicle can also be received. When the gear position of the gearbox is 0 gear, the state of the clutch is a closed state or a control state, and the current of the clutch is greater than a fourth current, the clutch is controlled to be opened.

[0092] The gear position of the gearbox being 0 gear means that the automatic gearbox control unit receives an instruction to open the clutch. The fourth current is set based on experience or flexibly adjusted according to an implementation environment, and embodiments of the present application do not limit this. For example, the fourth current is 650 milliamps.

[0093] When the current of the clutch is greater than the fourth current, the clutch can transmit torque to the wheel end, which can cause 1.5 G (gigabyte) acceleration to trigger unexpected movement or unexpected acceleration, so that the safety of the vehicle is poor.

[0094] In a case where the gear position of the gearbox is changed from 1st gear to 0th gear, the state of the clutch is closed, and the current of the clutch is greater than the fifth current, the clutch is controlled to be opened, and the fifth current is less than the fourth current.

[0095] The gear position of the gearbox being changed from 1st gear to 0th gear means that the automatic gearbox control unit receives an instruction to open the clutch. The fifth current is set based on experience or flexibly adjusted according to an implementation environment, which is not limited in the embodiments of the present application. For example, the fifth current is 400 milliampere.

[0096] The current of the clutch is greater than the fifth current, at this time, the clutch can transmit torque to the wheel end, which can cause unintended movement or unintended acceleration.

[0097] The above method calculates the first state of the clutch based on the rotating speed of the generator and the rotating speed of the driving motor, and calculates the second state of the clutch based on the current of the clutch, and determines the state of the clutch based on the driving speed of the vehicle, the first state of the clutch and the second state of the clutch. The method can effectively avoid the limitation of determining the state of the clutch by a single parameter, can solve the problem that the determined state of the clutch is inaccurate due to large engine speed fluctuation, improves the accuracy and reliability of the determination of the state of the clutch, thereby ensuring the driving safety of the vehicle and optimizing the driving experience of the vehicle.

[0098] Figure 3 is a flowchart of a determination method of a clutch state provided by the embodiments of the present application, as shown in Figure 3 The method includes the following contents.

[0099] The rotating speed of the generator of the vehicle, the rotating speed of the driving motor of the vehicle, the current of the clutch of the vehicle and the driving speed of the vehicle are obtained.

[0100] In a possible implementation, the process of obtaining the rotating speed of the generator of the vehicle, the rotating speed of the driving motor of the vehicle, the current of the clutch of the vehicle and the driving speed of the vehicle has been described in the above step 201, which will not be repeated here.

[0101] The rotating speed difference is determined according to the rotating speed of the generator of the vehicle and the rotating speed of the driving motor of the vehicle.

[0102] In a possible implementation, the process of determining the rotating speed difference according to the rotating speed of the generator of the vehicle and the rotating speed of the driving motor of the vehicle has been described in the above step 202, which will not be repeated here.

[0103] The first state of the clutch is determined according to the rotating speed difference.

[0104] In a possible implementation, the process of determining the first state of the clutch according to the speed difference between the generator and the drive motor has been described in step 202, and the embodiments of the present application will not be repeated here.

[0105] The second state of the clutch is determined according to the current of the clutch of the vehicle.

[0106] In a possible implementation, the process of determining the second state of the clutch according to the current of the clutch of the vehicle has been described in step 203, and the embodiments of the present application will not be repeated here.

[0107] The state of the clutch is determined according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch.

[0108] In a possible implementation, the process of determining the state of the clutch according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch has been described in step 204, and the embodiments of the present application will not be repeated here.

[0109] Figure 4 As shown in FIG. 4, the device includes: Figure 4 As shown in FIG. 4, the device includes:

[0110] The acquisition module 401 is configured to acquire the speed of the generator of the vehicle, the speed of the drive motor of the vehicle, the current of the clutch of the vehicle and the driving speed of the vehicle.

[0111] The determination module 402 is configured to determine the first state of the clutch according to the speed of the generator and the speed of the drive motor.

[0112] The determination module 402 is further configured to determine the second state of the clutch according to the current of the clutch.

[0113] The determination module 402 is further configured to determine the state of the clutch according to the driving speed of the vehicle, the first state of the clutch and the second state of the clutch.

[0114] In a possible implementation, the determination module 402 is configured to determine the speed difference between the speed of the generator and the speed of the drive motor.

[0115] The first state of the clutch is determined according to the speed difference.

[0116] In a possible implementation, the first state of the clutch includes a closed state, an open state and a control state.

[0117] The determination module 402 is configured to determine that the first state of the clutch is the open state when the speed difference is greater than a first speed.

[0118] In a case where the rotational speed difference value is less than a second rotational speed, the first state of the clutch is determined as a closed state, the second rotational speed being less than the first rotational speed;

[0119] In a case where the rotational speed difference value is not less than the second rotational speed and not greater than the first rotational speed, the first state of the clutch is determined as a control state.

[0120] In a possible implementation, the second state of the clutch includes a closed state, an open state and a pre-charge state;

[0121] The determining module 402 is configured to determine, in a case where the current of the clutch is greater than a first current, the second state of the clutch as the closed state;

[0122] In a case where the current of the clutch is less than a second current, the second state of the clutch is determined as the open state, the second current being less than the first current;

[0123] In a case where the current of the clutch is not less than the second current and not greater than the first current, the second state of the clutch is determined as the pre-charge state.

[0124] In a possible implementation, the determining module 402 is configured to determine, in a case where the driving speed of the vehicle is less than a driving speed threshold, the second state of the clutch as the state of the clutch;

[0125] In a case where the driving speed of the vehicle is not less than the driving speed threshold, the state of the clutch is determined according to the current of the clutch, the first state of the clutch and the second state of the clutch.

[0126] In a possible implementation, the determining module 402 is configured to determine, in a case where the current of the clutch is less than a third current, the second state of the clutch as the state of the clutch;

[0127] In a case where the current of the clutch is not less than the third current, the first state of the clutch is determined as the state of the clutch.

[0128] In a possible implementation, the apparatus further includes:

[0129] The receiving module is configured to receive a gear of a gearbox of the vehicle sent by a vehicle controller of the vehicle;

[0130] The control module is configured to control the clutch to open in a case where the gear of the gearbox is 0 gear, the state of the clutch is the closed state or the control state, and the current of the clutch is greater than a fourth current.

[0131] The control module is further configured to control the clutch to open in a case where the gear of the gearbox is changed from 1 gear to 0 gear, the state of the clutch is the closed state, and the current of the clutch is greater than a fifth current, the fifth current being less than the fourth current.

[0132] The device calculates the first state of the clutch based on the rotation speed of the generator and the rotation speed of the driving motor, calculates the second state of the clutch based on the current of the clutch, and determines the state of the clutch based on the driving speed of the vehicle, the first state of the clutch and the second state of the clutch, which can effectively avoid the limitation of determining the state of the clutch by a single parameter, solve the problem of inaccurate determination of the state of the clutch caused by large fluctuation of the engine rotation speed, improve the accuracy and reliability of the determination of the state of the clutch, and thus guarantee the driving safety of the vehicle and optimize the driving experience of the vehicle.

[0133] It should be understood that the device provided above is only exemplified by the division of the above functional modules when realizing its functions, and in actual application, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above described functions. In addition, the device and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be described here.

[0134] In a possible implementation, an automatic transmission control unit is also provided, which includes a processor and a memory, and the memory stores at least one program code, which is loaded and executed by the processor to implement any one of the above clutch state determination methods.

[0135] In a possible implementation, a vehicle is also provided, which includes an automatic transmission control unit configured to implement any one of the above clutch state determination methods.

[0136] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the present application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0137] It should be understood that "multiple" referred to herein refers to two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after it are in an "or" relationship.

[0138] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for determining a clutch state, characterized in that: The method comprises: Obtaining the rotation speed of the generator of the vehicle, the rotation speed of the drive motor of the vehicle, the current of the clutch of the vehicle, and the driving speed of the vehicle; determining a first state of the clutch according to a rotational speed of the generator and a rotational speed of the drive motor; determining a second state of the clutch based on the current of the clutch; The state of the clutch is determined based on a driving speed of the vehicle, a first state of the clutch, and a second state of the clutch.

2. The method according to claim 1, characterized in that Determining the first state of the clutch according to the rotational speed of the generator and the rotational speed of the drive motor includes: determining a speed difference between a speed of the generator and a speed of the drive motor; A first state of the clutch is determined based on the speed difference.

3. The method according to claim 2, characterized in that The first state of the clutch includes a closed state, an open state and a control state; Determining the first state of the clutch according to the speed difference includes: When the speed difference is greater than a first speed, determining that the first state of the clutch is the open state; When the speed difference is less than a second speed, determining that the first state of the clutch is the closed state, and the second speed is less than the first speed; When the speed difference is not less than the second speed and not greater than the first speed, the first state of the clutch is determined to be the control state.

4. The method according to claim 1, wherein The second state of the clutch includes a closed state, an open state and a pre-charged state; Determining the second state of the clutch according to the current of the clutch includes: When the current of the clutch is greater than the first current, determining that the second state of the clutch is the closed state; determining that the second state of the clutch is the open state when the current of the clutch is less than a second current, and the second current is less than the first current; When the current of the clutch is not less than the second current and not greater than the first current, the second state of the clutch is determined to be the pre-charge state.

5. The method according to any one of claims 1 to 4, characterized in that: Determining the state of the clutch according to the driving speed of the vehicle, the first state of the clutch, and the second state of the clutch includes: determining, when a driving speed of the vehicle is less than a driving speed threshold, the second state of the clutch as the state of the clutch; When the driving speed of the vehicle is not less than the driving speed threshold, the state of the clutch is determined according to the current of the clutch, the first state of the clutch, and the second state of the clutch.

6. The method according to claim 5, characterized in that Determining the state of the clutch according to the current of the clutch, the first state of the clutch, and the second state of the clutch includes: determining the second state of the clutch as the state of the clutch when the current of the clutch is less than the third current; In a case where the current of the clutch is not less than the third current, the first state of the clutch is determined to be the state of the clutch.

7. The method according to any one of claims 1 to 4, characterized in that: After determining the state of the clutch according to the driving speed of the vehicle, the first state of the clutch, and the second state of the clutch, the method further includes: Receiving the gear position of the transmission of the vehicle sent by the vehicle controller of the vehicle; When the gear position of the transmission is 0, the state of the clutch is a closed state or a controlled state, and the current of the clutch is greater than a fourth current, controlling the clutch to open; When the gear position of the transmission changes from 1st gear to 0th gear, the clutch is in a closed state, and the current of the clutch is greater than the fifth current, the clutch is controlled to be open, and the fifth current is less than the fourth current.

8. A device for determining a clutch state, characterized in that: The device comprises: an acquisition module, configured to acquire the rotational speed of a generator of a vehicle, the rotational speed of a drive motor of the vehicle, the current of a clutch of the vehicle, and the driving speed of the vehicle; a determination module, configured to determine a first state of the clutch according to a rotational speed of the generator and a rotational speed of the drive motor; The determining module is further configured to determine a second state of the clutch according to the current of the clutch; The determination module is further configured to determine the state of the clutch according to the driving speed of the vehicle, the first state of the clutch, and the second state of the clutch.

9. An automatic transmission control unit, characterized in that: The automatic transmission control unit includes a processor and a memory, wherein the memory stores at least one program code, and the at least one program code is loaded and executed by the processor to implement the clutch state determination method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: The vehicle includes an automatic transmission control unit, which is configured to implement the clutch state determination method according to any one of claims 1 to 7.

Images