Pressure control method and device for clutch, vehicle and storage medium

Abstract

The invention relates to a clutch pressure control method and device, a vehicle and a storage medium, and the method comprises the steps that current operation parameters of the vehicle are obtained; judging whether the vehicle meets a preset oil filling or pressure relief condition or not based on the current operation parameters; if the vehicle does not meet the preset oil charging or pressure relief condition, the target rotating speed of an electronic oil pump of the vehicle is determined based on the operation parameters and the current pressure of a clutch of the vehicle, and the actual rotating speed of the electronic oil pump is adjusted based on the target rotating speed till the actual pressure of the clutch of the vehicle reaches the target pressure. Therefore, the technical problems that in the related technology, a vehicle needs to be provided with various parts, the cost is high, the weight is large, the response speed is low, the gear shifting efficiency is affected, the control precision is poor, and therefore the driving experience of a user is affected are solved.

Description

Technical Field

[0001] The present application relates to the technical field of gearboxes, and in particular to a clutch pressure control method, device, vehicle and storage medium. Background Art

[0002] In the related art, in the control of clutch pressure, a hydraulic system equipped with a clutch proportional solenoid valve controls the pressure by controlling the current of the clutch proportional solenoid valve.

[0003] However, in the related technology, in order to achieve clutch pressure control, the vehicle needs to have components such as an electronic oil pump or a mechanical pump, a hydraulic valve plate and a solenoid valve, which are costly and heavy, have a slow response speed, affect the shifting time, have poor control accuracy, and affect the user's driving experience, and need to be improved. Summary of the invention

[0004] The present application provides a clutch pressure control method, device, vehicle and storage medium to solve the technical problems in the related technology that the vehicle needs to have multiple parts, which are high in cost and weight, slow in response speed, affecting the shifting efficiency, and poor in control accuracy, thereby affecting the user's driving experience.

[0005] The first aspect of the present application provides a clutch pressure control method, comprising the following steps: acquiring current operating parameters of a vehicle; determining whether the vehicle meets preset oil filling or pressure relief conditions based on the current operating parameters; if the vehicle does not meet the preset oil filling or pressure relief conditions, determining a target speed of the vehicle's electronic oil pump based on the operating parameters and the current pressure of the vehicle's clutch, and adjusting the actual speed of the electronic oil pump based on the target speed until the actual pressure of the vehicle's clutch reaches the target pressure.

[0006] Optionally, in one embodiment of the present application, determining the target speed of the electronic oil pump of the vehicle based on the operating parameters and the current pressure of the clutch of the vehicle includes: reading the NP characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle; matching the corresponding basic speed of the electronic oil pump in the NP characteristic range table based on the current oil temperature and the target pressure; and obtaining the target speed by combining the electronic oil pump basic speed, the current oil temperature, the target pressure and the current pressure.

[0007] Optionally, in one embodiment of the present application, the actual speed of the electronic oil pump is adjusted based on the target speed until the actual pressure of the clutch of the vehicle reaches the target pressure, including: controlling the electronic oil pump using the target speed, and obtaining the actual pressure of the clutch after a preset operating cycle; judging whether the actual pressure reaches the target pressure; if the actual pressure reaches the target pressure, controlling the electronic oil pump at the target speed; if the actual pressure does not reach the target pressure, updating the target speed based on the actual pressure, and controlling the electronic oil pump using the updated target speed until the actual pressure reaches the target pressure.

[0008] Optionally, in one embodiment of the present application, the reading of the NP characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle includes: detecting the NP characteristic range characteristic value stored in the controller of the electronic oil pump; and determining the NP characteristic range table corresponding to the electronic oil pump speed and clutch pressure based on the stored NP characteristic range characteristic value.

[0009] Optionally, in one embodiment of the present application, judging whether the vehicle meets the preset oil filling or pressure relief conditions based on the current operating parameters includes: determining the current driving mode of the vehicle based on the current operating parameters; when the current driving mode is the extended-range mode, judging whether the vehicle meets the preset conditions for entering the engine direct drive mode based on the current operating parameters, and when the vehicle meets the preset conditions for entering the engine direct drive mode, determining that the vehicle meets the preset oil filling conditions; when the current driving mode is the engine direct drive mode, judging whether the vehicle meets the preset conditions for entering the Zengcheng mode based on the current operating parameters, and when the vehicle meets the preset conditions for entering the extended-range mode, determining that the vehicle meets the preset pressure relief conditions.

[0010] Optionally, in one embodiment of the present application, after determining whether the vehicle meets the preset oil filling or pressure relief conditions based on the operating parameters, it also includes: if the vehicle meets the preset oil filling or pressure relief conditions, obtaining the judgment result of the vehicle, and controlling the clutch of the vehicle to enter a corresponding control stage based on the judgment result; when the control stage is the oil filling stage, determining the oil filling speed and oil filling time of the electronic oil pump according to the current oil temperature of the vehicle and the preset oil filling basic table, and adjusting the clutch pressure based on the oil filling speed and oil filling time; when the control stage is the pressure relief stage, determining the pressure relief speed and pressure relief time of the electronic oil pump according to the current oil temperature and the preset pressure relief control table, and adjusting the clutch pressure based on the pressure relief speed and pressure relief time.

[0011] Optionally, in one embodiment of the present application, the target pressure is obtained by the control stage and the clutch transmission torque value.

[0012] The second aspect of the present application provides a clutch pressure control device, including: an acquisition module for acquiring current operating parameters of a vehicle; a judgment module for judging whether the vehicle meets preset oil filling or pressure relief conditions based on the current operating parameters; a first control module for determining a target speed of the vehicle's electronic oil pump based on the operating parameters and the current pressure of the vehicle's clutch when the vehicle does not meet the preset oil filling or pressure relief conditions, and adjusting the actual speed of the electronic oil pump based on the target speed until the actual pressure of the vehicle's clutch reaches the target pressure.

[0013] Optionally, in one embodiment of the present application, the first control module includes: a reading unit for reading an NP characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle; a matching unit for matching the corresponding basic speed of the electronic oil pump in the NP characteristic range table based on the current oil temperature and the target pressure; and a calculation unit for obtaining the target speed by combining the electronic oil pump basic speed, the current oil temperature, the target pressure and the current pressure.

[0014] Optionally, in one embodiment of the present application, the first control module includes: an acquisition unit, used to control the electronic oil pump using the target speed, and obtain the actual pressure of the clutch after a preset operating cycle; a judgment unit, used to judge whether the actual pressure reaches the target pressure; a first control unit, used to control the electronic oil pump at the target speed when the actual pressure reaches the target pressure; a second control unit, used to update the target speed based on the actual pressure when the actual pressure does not reach the target pressure, and control the electronic oil pump using the updated target speed until the actual pressure reaches the target pressure.

[0015] Optionally, in one embodiment of the present application, the reading unit includes: a detection subunit, used to detect the NP characteristic range characteristic value stored in the controller of the electronic oil pump; and a determination subunit, used to determine the NP characteristic range table corresponding to the electronic oil pump speed and clutch pressure based on the stored NP characteristic range characteristic value.

[0016] Optionally, in one embodiment of the present application, the judgment module includes: a first determination unit, used to determine the current driving mode of the vehicle based on the current operating parameters; a second determination unit, used to determine whether the vehicle meets the preset conditions for entering the engine direct drive mode based on the current operating parameters when the current driving mode is the extended-range mode, and determine that the vehicle meets the preset oil filling conditions when the vehicle meets the preset conditions for entering the engine direct drive mode; a third determination unit, used to determine whether the vehicle meets the preset conditions for entering the extended-range mode based on the current operating parameters when the current driving mode is the engine direct drive mode, and determine that the vehicle meets the preset pressure relief conditions when the vehicle meets the preset conditions for entering the extended-range mode.

[0017] Optionally, in one embodiment of the present application, it also includes: a second control module, which is used to obtain a judgment result of the vehicle when the vehicle meets the preset oil filling or pressure relief condition, and control the clutch of the vehicle to enter a corresponding control stage based on the judgment result; a first adjustment module, which is used to determine the filling speed and filling time of the electronic oil pump according to the current oil temperature of the vehicle and a preset oil filling basic table when the control stage is the oil filling stage, and adjust the clutch pressure based on the oil filling speed and filling time; a second adjustment module, which is used to determine the pressure relief speed and pressure relief time of the electronic oil pump according to the current oil temperature and a preset pressure relief control table when the control stage is the pressure relief stage, and adjust the clutch pressure based on the pressure relief speed and pressure relief time.

[0018] Optionally, in one embodiment of the present application, the target pressure is obtained by the control stage and the clutch transmission torque value.

[0019] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the clutch pressure control method as described in the above embodiment.

[0020] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the clutch pressure control method as described in the above embodiment.

[0021] A fifth aspect of the present application provides a computer program product, including a computer program, which, when executed, is used to implement the above clutch pressure control method.

[0022] The embodiment of the present application can judge whether the vehicle is in the oil filling stage or the pressure relief stage according to the current operating parameters of the vehicle, and when the vehicle is not in the oil filling stage or the pressure relief stage, the target speed of the vehicle's electronic oil pump is determined according to the operating parameters and the current pressure of the vehicle's clutch, and the electronic oil pump is guided by the target speed until the actual pressure of the vehicle's clutch reaches the target pressure, and the pressure regulating characteristics of the throttle hole are used to control the speed of the oil pump to adjust the flow through the throttle hole to achieve the purpose of pressure regulation, with lower cost and weight, fast pressure response, short shifting time, high control accuracy, good consistency of control effect, and small calibration workload in the development stage. Thus, the technical problem in the related art that the vehicle needs to have a variety of parts, high cost and heavy weight, slow response speed, affecting shifting efficiency, and poor control accuracy, thereby affecting the user's driving experience, is solved.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A flow chart of a clutch pressure control method provided according to an embodiment of the present application;

[0026] Figure 2 A flow chart of a clutch pressure control method according to an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a control effect provided according to an embodiment of the present application;

[0028] Figure 4 It is a structural schematic diagram of a clutch pressure control device provided according to an embodiment of the present application;

[0029] Figure 5 It is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0031] The clutch pressure control method, device, vehicle and storage medium of the embodiment of the present application are described below with reference to the accompanying drawings. In view of the technical problem that the related technologies mentioned in the above background technology require the vehicle to have multiple components, which are high in cost and weight, slow in response speed, affect the shifting efficiency, and have poor control accuracy, thereby affecting the user's driving experience, the present application provides a clutch pressure control method, in which the vehicle can be judged to be in the oil filling stage or the pressure relief stage according to the current operating parameters of the vehicle, and when the vehicle is not in the oil filling stage or the pressure relief stage, the target speed of the electronic oil pump of the vehicle is determined according to the operating parameters and the current pressure of the clutch of the vehicle, and the electronic oil pump is guided by the target speed until the actual pressure of the clutch of the vehicle reaches the target pressure, and the pressure regulating characteristics of the throttle hole are used to control the speed of the oil pump to adjust the flow through the throttle hole to achieve the purpose of pressure regulation, with lower cost and weight, faster pressure response, shorter shifting time, higher control accuracy, better consistency of control effect, and less calibration workload in the development stage. Thereby, the technical problem in the related technology that the vehicle needs to have a variety of parts, which is high in cost and weight, has a slow response speed, affects the shifting efficiency, and has poor control accuracy, thereby affecting the user's driving experience is solved.

[0032] Specifically, Figure 1 A schematic flow chart of a clutch pressure control method provided in an embodiment of the present application.

[0033] like Figure 1 As shown, the clutch pressure control method includes the following steps:

[0034] In step S101, the current operating parameters of the vehicle are obtained.

[0035] During the actual implementation process, the embodiments of the present application can obtain the current operating parameters of the vehicle by receiving the vehicle's control signals and monitoring signals, where the current operating parameters may include the current oil temperature, the current pressure of the clutch, the battery status, the engine speed, the fuel consumption rate, etc.

[0036] Through the current operating parameters, the embodiment of the present application can also determine the current operating status, current driving mode, etc. of the vehicle.

[0037] In step S102, it is determined whether the vehicle meets preset oil filling or pressure relief conditions based on current operating parameters.

[0038] As a possible implementation method, the embodiment of the present application can determine whether the vehicle meets the preset oil filling or pressure relief conditions based on the current operating parameters, that is, based on the current driving mode of the vehicle, determine whether the vehicle can enter the oil filling stage or the pressure relief stage.

[0039] Optionally, in one embodiment of the present application, whether the vehicle meets the preset oil filling or pressure relief conditions is determined based on the current operating parameters, including: determining the current driving mode of the vehicle based on the current operating parameters; when the current driving mode is the extended-range mode, judging whether the vehicle meets the preset conditions for entering the engine direct drive mode based on the current operating parameters, and when the vehicle meets the preset conditions for entering the engine direct drive mode, determining that the vehicle meets the preset oil filling conditions; when the current driving mode is the engine direct drive mode, judging whether the vehicle meets the preset conditions for entering the extended-range mode based on the current operating parameters, and when the vehicle meets the preset conditions for entering the extended-range mode, determining that the vehicle meets the preset pressure relief conditions.

[0040] Here, the oil filling or pressure relief conditions are explained.

[0041] In the embodiment of the present application, when it is monitored that the vehicle meets the conditions for entering the engine direct drive mode from the extended range mode, it is determined that the vehicle meets the oil filling conditions, and the clutch control enters the oil filling stage;

[0042] When it is monitored that the vehicle meets the conditions for entering the extended-range mode from the engine direct drive mode, it is determined that the vehicle meets the pressure relief conditions, and the clutch control enters the pressure relief stage.

[0043] It can be understood that in the extended-range mode, the main driving source of the vehicle is the electric motor, and the internal combustion engine (ICE) serves as an auxiliary device to charge the battery, thereby extending the vehicle's driving distance; the engine direct drive mode refers to the mode in which the internal combustion engine directly drives the vehicle.

[0044] For example, the preset conditions for entering the engine direct drive mode may include whether the battery power exceeds a certain threshold, whether the battery health is good, whether the vehicle requires a stable speed and / or low load, whether the engine temperature is suitable, etc.;

[0045] The preset conditions for entering the extended-range mode may include whether the battery power is below a certain value, whether the battery needs to be charged, whether the engine is in an efficient working state, etc.

[0046] Optionally, in one embodiment of the present application, after determining whether the vehicle meets the preset oil filling or pressure relief conditions based on the operating parameters, it also includes: if the vehicle meets the preset oil filling or pressure relief conditions, obtaining the judgment result of the vehicle, and controlling the vehicle's clutch to enter a corresponding control stage based on the judgment result; when the control stage is the oil filling stage, determining the oil filling speed and oil filling time of the electronic oil pump according to the current oil temperature of the vehicle and the preset oil filling basic table, and adjusting the clutch pressure based on the oil filling speed and oil filling time; when the control stage is the pressure relief stage, determining the pressure relief speed and pressure relief time of the electronic oil pump according to the current oil temperature and the preset pressure relief control table, and adjusting the clutch pressure based on the pressure relief speed and pressure relief time.

[0047] In some embodiments, during the oil filling stage, the embodiment of the present application can control the speed and oil filling time of the electronic oil pump according to the current oil temperature T and the preset oil filling basic table as shown in Table 1. Table 1 is a control table for the oil filling stage, and the values ​​in Table 1 are only examples, and the specific parameters are determined according to the calibration results.

[0048] Table 1

[0049]

[0050] The embodiment of the present application can improve the clutch oil filling efficiency by increasing the speed of the electronic oil pump, so that the clutch pressure quickly approaches the pressure p at which the torque is to be transmitted. kp If PID is used to control the pressure in a closed loop, the pressure may exceed p due to overshoot. kp , which causes the clutch to slip and the vehicle to shake.

[0051] In the pressure relief stage, the embodiment of the present application can be based on the current oil temperature T as follows: Figure 2 The preset pressure relief stage control table shown controls the speed and pressure relief time of the electronic oil pump. Among them, Table 2 is the pressure relief stage control table, and the values ​​in Table 2 are only examples. The specific parameters are determined according to the calibration results.

[0052] Table 2

[0053]

[0054] In the embodiment of the present application, the clutch pressure can be quickly released to a pressure lower than the starting torque transmission pressure p by increasing the speed of the electronic oil pump reverse rotation. kp , improve the gear shift response speed.

[0055] Alternatively, in one embodiment of the present application, the target pressure is obtained by the control stage and the clutch transmission torque value.

[0056] In other embodiments, the clutch target pressure can be set in the following ways: a) the vehicle is in the range-extending mode, and the clutch target pressure is the base pressure p base The size of this basic pressure can ensure that the oil channel of the clutch is full of oil and is less than the pressure p at which the clutch starts to transmit torque. kp The main function is to shorten the time it takes for the clutch to build pressure when entering the engine direct drive stage and improve the consistency of the control effect; b) During the oil filling stage and the engine speed regulation stage, the target pressure is set to be slightly lower than the pressure p at which the clutch starts to transmit torque kp , for example (p kp -0.2)bar; c) In other cases, it is set according to the torque transmitted by the clutch.

[0057] In step S103, if the vehicle does not meet the preset oil filling or pressure relief conditions, the target speed of the vehicle's electronic oil pump is determined based on the operating parameters and the current pressure of the vehicle's clutch, and the actual speed of the electronic oil pump is adjusted based on the target speed until the actual pressure of the vehicle's clutch reaches the target pressure.

[0058] In the case where the vehicle does not meet the preset oil filling or pressure relief conditions, the embodiment of the present application can calculate the electronic oil pump speed n corresponding to the target pressure by interpolation based on the operating parameters and the current pressure of the vehicle's clutch. x ; At the electronic oil pump speed n x On this basis, PID control is performed according to the current oil temperature, target pressure and actual pressure difference to obtain the control target speed n of the electronic oil pump. y ; Control the electronic oil pump according to the target speed so that the actual clutch pressure quickly approaches the target pressure.

[0059] Optionally, in one embodiment of the present application, the target speed of the electronic oil pump of the vehicle is determined based on the operating parameters and the current pressure of the clutch of the vehicle, including: reading the np characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle; matching the corresponding basic speed of the electronic oil pump in the np characteristic range table based on the current oil temperature and the target pressure; and obtaining the target speed by combining the basic speed of the electronic oil pump, the current oil temperature, the target pressure and the current pressure. Among them, reading the np characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle includes: detecting the np characteristic range characteristic value stored in the controller of the electronic oil pump; and determining the np characteristic range table corresponding to the electronic oil pump speed and clutch pressure based on the stored np characteristic range characteristic value.

[0060] During the actual implementation process, the embodiment of the present application can verify in real time the np characteristic range corresponding to the electronic oil pump speed and clutch pressure of the transmission hydraulic system (the correspondence table of the electronic oil pump speed and clutch pressure at each temperature). The verification method is to detect in real time the characteristic value of the np characteristic range stored in the electronic oil pump controller. For example, the characteristic value '1' represents the upper limit np characteristic, then the np characteristic table of the upper limit characteristic is read; the characteristic value '2' represents the median np characteristic, then the np characteristic table of the median characteristic is read; the characteristic value '3' represents the lower limit np characteristic, then the np characteristic table of the lower limit characteristic is read.

[0061] Among them, the np characteristic table is the data obtained by testing the hydraulic limit parts of the gearbox during the development stage, and is stored in the controller of the vehicle as a basic data table. When the gearbox is tested offline, the np characteristic range of the gearbox hydraulic system will be determined based on the offline data, and then the characteristic value will be stored in the electronic oil pump controller. For example, when the np characteristic is determined to belong to the median np characteristic range at offline, the characteristic value '2' will be stored in the electronic oil pump controller. The characteristic value of the np characteristic range can also be stored in the motor controller on the gearbox, or in both the electronic oil pump controller and the motor controller.

[0062] Table 3 is a schematic table of the median np characteristics. The values ​​in the table are only examples. The horizontal axis is pressure in bar; the vertical axis is oil temperature in °C; the data in the table is the speed of the electronic oil pump in r / min. The upper limit np characteristic table and the lower limit np characteristic table are similar to Table 3, except that the speed of the electronic oil pump in the table is different.

[0063] Table 3

[0064]

[0065] It should be noted that this example only divides the np characteristic into three specifications; it can also be divided into more specifications; the more specifications, the more the basic speed n of the electronic oil pump obtained by interpolation calculation x The more accurate.

[0066] Furthermore, the embodiment of the present application can find the basic speed n of the electronic oil pump x , if the current oil temperature is 60℃, the target pressure is 10bar, and the np characteristic value obtained by real-time verification is '2', then reading Table 3 shows that the corresponding electronic oil pump speed is 1150r / min. If the pressure is between two pressure values ​​in Table 3 or the oil temperature is between two oil temperature values ​​in Table 3, the basic speed n of the electronic oil pump is obtained by interpolation calculation. x .

[0067] The electronic oil pump speed n x On this basis, the embodiment of the present application can perform PID (a controller integrating proportional control, integral control and differential control) control according to the current oil temperature, target pressure and actual pressure difference to obtain the adjustment increment Δn of the electronic oil pump speed, and then obtain the control target speed n y =n x +Δn.

[0068] Optionally, in one embodiment of the present application, the actual speed of the electronic oil pump is adjusted based on the target speed until the actual pressure of the vehicle's clutch reaches the target pressure, including: controlling the electronic oil pump using the target speed, and obtaining the actual pressure of the clutch after a preset operating cycle; judging whether the actual pressure reaches the target pressure; if the actual pressure reaches the target pressure, controlling the electronic oil pump at the target speed; if the actual pressure does not reach the target pressure, updating the target speed based on the actual pressure, and controlling the electronic oil pump using the updated target speed until the actual pressure reaches the target pressure.

[0069] As a possible implementation method, the embodiment of the present application can use the calculated target speed n y To improve the pressure response speed and make the actual pressure reach the target pressure quickly, the electronic oil pump is controlled to reach the target speed within a certain time (such as 10ms); if the pressure response speed requirement is not high, the electronic oil pump can also be controlled to reach the target speed within an integer multiple of a certain time.

[0070] The embodiment of the present application can detect the actual clutch pressure value in real time through the pressure sensor, and then upload the actual pressure to the vehicle controller in a cycle time (such as 10ms), and the vehicle controller determines whether the actual pressure reaches the target pressure. If the pressure does not reach the target value, the new target speed is calculated based on the actual pressure, oil temperature and other parameters after the cycle; if the pressure reaches the target value, the electronic oil pump is controlled to run at the current speed.

[0071] During operation, the embodiment of the present application can receive control signals and monitoring signals of the vehicle in real time, and obtain the vehicle's operating status, oil temperature, actual clutch pressure and target pressure.

[0072] Combination Figure 2 and Figure 3 As shown, the working principle and control effect of the clutch pressure control method of the embodiment of the present application are described in detail with an embodiment.

[0073] During the actual execution process, the embodiment of the present application can obtain the vehicle's operating status, oil temperature T, actual clutch pressure and target pressure in real time.

[0074] Determine whether to enter the oil filling stage and pressure relief stage. If so, look up the temperature table and control according to the preset electronic oil pump speed and time; otherwise, enter the closed-loop control of the clutch pressure.

[0075] Real-time verification of the np characteristic range corresponding to the electronic oil pump speed and clutch pressure of the gearbox hydraulic system. According to the clutch target pressure, the basic speed n of the electronic oil pump is obtained by interpolation calculation. x ; At the electronic oil pump speed n xOn this basis, PID control is performed according to the current oil temperature, target pressure and actual pressure difference to obtain the control target speed n of the electronic oil pump. y ; Control the electronic oil pump according to the target speed.

[0076] The pressure sensor is used to detect in real time whether the actual clutch pressure has reached the target value. If it has reached the target value, the electronic oil pump is controlled to run at the current speed; if it has not reached the target pressure, PID control is performed according to the difference between the target pressure and the actual pressure until the target pressure is reached.

[0077] For example, Figure 2 As shown, the embodiment of the present application may include the following steps:

[0078] Step S201: The embodiment of the present application can obtain the vehicle's operating status, oil temperature, clutch actual pressure and target pressure in real time by receiving the vehicle's control signal and monitoring signal. The clutch target pressure is set in the following ways: a) The vehicle is in the extended range mode, and the clutch target pressure is the base pressure p base The size of this basic pressure can ensure that the oil channel of the clutch is full of oil and is less than the pressure p at which the clutch starts to transmit torque. kp The main function is to shorten the time it takes for the clutch to build pressure when entering the engine direct drive stage and improve the consistency of the control effect; b) During the oil filling stage and the engine speed regulation stage, the target pressure is set to be slightly lower than the pressure p at which the clutch starts to transmit torque kp , for example (p kp -0.2)bar; c) In other cases, it is set according to the torque transmitted by the clutch.

[0079] Wherein, the vehicle is in the extended range mode, and the clutch target pressure can be set as the basic pressure p base The size of this basic pressure can ensure that the oil channel of the clutch is filled with oil, which can shorten the time for the clutch to build pressure when entering the engine direct drive stage and improve the consistency of the control effect.

[0080] Step S202: The embodiment of the present application can determine whether to enter the oil filling stage or the pressure relief stage according to the vehicle driving mode: if it is monitored that the vehicle meets the conditions for entering the engine direct drive mode from the extended-range mode, the clutch control enters the oil filling stage; if it is monitored that the vehicle meets the conditions for entering the extended-range mode from the engine direct drive mode, the clutch control enters the pressure relief stage.

[0081] If the vehicle enters the oil filling stage or the pressure relief stage, the process proceeds to step S203 ; otherwise, the process proceeds to step S204 .

[0082] Step S203: In the oil filling stage, the embodiment of the present application can control the speed and oil filling time of the electronic oil pump according to the current oil temperature T and the preset oil filling basic table shown in Table 1. Table 1 is a control table for the oil filling stage, and the values ​​in Table 1 are only examples, and the specific parameters are determined according to the calibration results.

[0083] The embodiment of the present application can improve the clutch oil filling efficiency by increasing the speed of the electronic oil pump, so that the clutch pressure quickly approaches the pressure p at which the torque is to be transmitted. kp If PID is used to control the pressure in a closed loop, the pressure may exceed p due to overshoot. kp , which causes the clutch to slip and the vehicle to shake.

[0084] In the pressure relief stage, the embodiment of the present application can be based on the current oil temperature T as follows: Figure 2 The preset pressure relief stage control table shown controls the speed and pressure relief time of the electronic oil pump. Among them, Table 2 is the pressure relief stage control table, and the values ​​in Table 2 are only examples. The specific parameters are determined according to the calibration results.

[0085] In the embodiment of the present application, the clutch pressure can be quickly released to a pressure lower than the starting torque transmission pressure p by increasing the speed of the electronic oil pump reverse rotation. kp , improve the gear shift response speed.

[0086] By distinguishing the oil filling stage and the pressure relief stage, looking up the table according to the temperature, and controlling according to the preset electronic oil pump speed and time, the embodiment of the present application can quickly fill the oil or release the pressure and shorten the shifting time.

[0087] Step S204: The embodiment of the present application can verify the np characteristic range corresponding to the electronic oil pump speed and clutch pressure of the transmission hydraulic system in real time. The verification method is to detect the characteristic value of the np characteristic range stored in the electronic oil pump controller in real time. For example, the characteristic value '1' represents the upper limit np characteristic, and the np characteristic table of the upper limit characteristic is read; the characteristic value '2' represents the median np characteristic, and the np characteristic table of the median characteristic is read; the characteristic value '3' represents the lower limit np characteristic, and the np characteristic table of the lower limit characteristic is read.

[0088] Among them, the np characteristic table is the data obtained by testing the hydraulic limit parts of the gearbox during the development stage, and is stored in the controller of the vehicle as a basic data table. When the gearbox is tested offline, the np characteristic range of the gearbox hydraulic system will be determined based on the offline data, and then the characteristic value will be stored in the electronic oil pump controller. For example, when the np characteristic is determined to belong to the median np characteristic range at offline, the characteristic value '2' will be stored in the electronic oil pump controller. The characteristic value of the np characteristic range can also be stored in the motor controller on the gearbox, or in both the electronic oil pump controller and the motor controller.

[0089] Table 3 is a schematic table of the median np characteristics. The values ​​in the table are only examples. The horizontal axis is pressure in bar; the vertical axis is oil temperature in °C; the data in the table is the speed of the electronic oil pump in r / min. The upper limit np characteristic table and the lower limit np characteristic table are similar to Table 3, except that the speed of the electronic oil pump in the table is different.

[0090] It should be noted that this example only divides the np characteristic into three specifications; it can also be divided into more specifications; the more specifications, the more the basic speed n of the electronic oil pump obtained by interpolation calculation x The more accurate.

[0091] Among them, the np characteristics are divided into three specifications, and the basic speed n of the electronic oil pump obtained by interpolation calculation is x Accurate, can improve the control accuracy of clutch pressure.

[0092] Step S205: The embodiment of the present application can search for the basic speed n of the electronic oil pump x , if the current oil temperature is 60℃, the target pressure is 10bar, and the np characteristic value obtained by real-time verification is '2', then reading Table 3 shows that the corresponding electronic oil pump speed is 1150r / min. If the pressure is between two pressure values ​​in Table 3 or the oil temperature is between two oil temperature values ​​in Table 3, the basic speed n of the electronic oil pump is obtained by interpolation calculation. x .

[0093] The electronic oil pump speed n x On this basis, the embodiment of the present application can perform PID (a controller integrating proportional control, integral control and differential control) control according to the current oil temperature, target pressure and actual pressure difference to obtain the adjustment increment Δn of the electronic oil pump speed, and then obtain the control target speed n y =n x +Δn.

[0094] Step S206: In the embodiment of the present application, the target speed n may be used. yTo improve the pressure response speed and make the actual pressure reach the target pressure quickly, the electronic oil pump is controlled to reach the target speed within 10ms. If the pressure response speed requirement is not high, the electronic oil pump can also be controlled to reach the target speed within an integer multiple of 10ms.

[0095] Step S207: The embodiment of the present application can detect the actual pressure value of the clutch in real time through the pressure sensor, and then upload the actual pressure to the vehicle controller in a cycle of 10ms, and the vehicle controller determines whether the actual pressure reaches the target pressure. If the pressure does not reach the target value, it proceeds to step S205; if the pressure reaches the target value, it proceeds to step S208.

[0096] Step S208: When the pressure reaches the target value, the embodiment of the present application can control the electronic oil pump to operate at the current speed. During operation, the control signal and monitoring signal of the vehicle are received in real time to obtain the vehicle's operating status, oil temperature, actual clutch pressure and target pressure.

[0097] Based on the above method, the control effect of the embodiment of the present application can be as follows: Figure 3 As shown, the horizontal axis is time, the unit is s; the vertical axis on the left is the electronic oil pump speed, the unit is r / min; the vertical axis on the right is the clutch pressure, the unit is bar.

[0098] In summary, during the oil filling and pressure relief stages, the embodiment of the present application can look up the table based on the temperature and control the electronic oil pump speed and time according to the preset, so as to quickly fill the oil or release the pressure and shorten the shifting time. When the vehicle is in the extended range mode, the embodiment of the present application can set the clutch target pressure to the basic pressure p base The size of this basic pressure can ensure that the oil channel of the clutch is full of oil, which can shorten the time for the clutch to build pressure when entering the engine direct drive stage and improve the consistency of the control effect. The embodiment of the present application can divide the np characteristic representing the correspondence between the electronic oil pump speed and the clutch pressure into three specifications: upper limit, median and lower limit. When the gearbox is tested offline, it will determine which np characteristic range the np characteristic of the gearbox hydraulic system belongs to based on the offline data, and then store the characteristic value in the electronic oil pump controller. The vehicle controller verifies the np characteristic range corresponding to the electronic oil pump speed and clutch pressure of the gearbox hydraulic system in real time, and calculates the basic speed n of the electronic oil pump obtained by interpolation according to the target pressure. x Accurate, can improve the control accuracy of clutch pressure.

[0099] According to the clutch pressure control method proposed in the embodiment of the present application, it is possible to determine whether the vehicle is in the oil filling stage or the pressure relief stage according to the current operating parameters of the vehicle, and when the vehicle is not in the oil filling stage or the pressure relief stage, the target speed of the vehicle's electronic oil pump is determined according to the operating parameters and the current pressure of the vehicle's clutch, and the electronic oil pump is guided by the target speed until the actual pressure of the vehicle's clutch reaches the target pressure, and the pressure regulating characteristics of the throttle hole are used to control the speed of the oil pump to adjust the flow through the throttle hole to achieve the purpose of pressure regulation, with lower cost and weight, fast pressure response, short shifting time, high control accuracy, good consistency of control effect, and small calibration workload in the development stage. Thus, the technical problem in the related art that the vehicle needs to have a variety of components, which is high in cost and weight, slow in response speed, affects the shifting efficiency, and has poor control accuracy, thereby affecting the user's driving experience is solved.

[0100] Next, the pressure control device of the clutch proposed in accordance with the embodiment of the present application will be described with reference to the accompanying drawings.

[0101] Figure 4 It is a block diagram of a pressure control device of a clutch according to an embodiment of the present application.

[0102] like Figure 4 As shown, the clutch pressure control device 10 includes: an acquisition module 100 , a judgment module 200 and a first control module 300 .

[0103] Specifically, the acquisition module 100 is used to acquire the current operating parameters of the vehicle.

[0104] The judgment module 200 is used to judge whether the vehicle meets the preset oil filling or pressure relief conditions based on the current operating parameters.

[0105] The first control module 300 is used to determine the target speed of the vehicle's electronic oil pump based on operating parameters and the current pressure of the vehicle's clutch when the vehicle does not meet preset oil filling or pressure relief conditions, and adjust the actual speed of the electronic oil pump based on the target speed until the actual pressure of the vehicle's clutch reaches the target pressure.

[0106] Optionally, in one embodiment of the present application, the first control module 300 includes: a reading unit, a matching unit and a calculation unit.

[0107] The reading unit is used to read the np characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle.

[0108] The matching unit is used to match the basic speed of the corresponding electronic oil pump in the np characteristic range table based on the current oil temperature and the target pressure.

[0109] The calculation unit is used to obtain a target speed by combining a basic speed of the electronic oil pump, a current oil temperature, a target pressure and a current pressure.

[0110] Optionally, in one embodiment of the present application, the first control module 300 includes: an acquisition unit, a judgment unit, a first control unit and a second control unit.

[0111] The acquisition unit is used to control the electronic oil pump using the target speed and to acquire the actual pressure of the clutch after a preset operation cycle.

[0112] The judging unit is used to judge whether the actual pressure reaches the target pressure.

[0113] The first control unit is used to control the electronic oil pump at a target speed when the actual pressure reaches the target pressure.

[0114] The second control unit is used to update the target speed based on the actual pressure when the actual pressure does not reach the target pressure, and control the electronic oil pump using the updated target speed until the actual pressure reaches the target pressure.

[0115] Optionally, in one embodiment of the present application, the reading unit includes: a detection subunit and a determination subunit.

[0116] The detection subunit is used to detect the np characteristic range characteristic value stored in the controller of the electronic oil pump.

[0117] The determination subunit is used to determine the NP characteristic range table corresponding to the electronic oil pump speed and the clutch pressure based on the stored NP characteristic range characteristic value.

[0118] Optionally, in an embodiment of the present application, the judgment module 200 includes: a first determination unit, a second determination unit and a third determination unit.

[0119] Wherein, the first determination unit is used to determine the current driving mode of the vehicle based on the current operating parameters.

[0120] The second determination unit is used to determine whether the vehicle meets the preset conditions for entering the engine direct drive mode based on the current operating parameters when the current driving mode is the extended-range mode, and to determine whether the vehicle meets the preset conditions for entering the engine direct drive mode when the vehicle meets the preset conditions for entering the engine direct drive mode.

[0121] The third determination unit is used to determine whether the vehicle meets the preset conditions for entering the Zengcheng mode based on the current operating parameters when the current driving mode is the engine direct drive mode, and to determine whether the vehicle meets the preset conditions for entering the extended-range mode when the vehicle meets the preset conditions for entering the extended-range mode.

[0122] Optionally, in one embodiment of the present application, it further includes: a second control module, a first regulating module and a second regulating module.

[0123] Among them, the second control module is used to obtain the vehicle's judgment result when the vehicle meets the preset oil filling or pressure relief conditions, and control the vehicle's clutch to enter the corresponding control stage based on the judgment result.

[0124] The first regulating module is used to determine the filling speed and filling time of the electronic oil pump according to the current oil temperature of the vehicle and a preset filling basic table when the control stage is the filling stage, and to adjust the clutch pressure based on the filling speed and the filling time.

[0125] The second regulating module is used to determine the pressure relief speed and pressure relief time of the electronic oil pump according to the current oil temperature and a preset pressure relief control table when the control stage is the pressure relief stage, and adjust the clutch pressure based on the pressure relief speed and the pressure relief time.

[0126] Alternatively, in one embodiment of the present application, the target pressure is obtained by the control stage and the clutch transmission torque value.

[0127] It should be noted that the above explanation of the clutch pressure control method embodiment is also applicable to the clutch pressure control device of this embodiment, and will not be repeated here.

[0128] According to the clutch pressure control device proposed in the embodiment of the present application, it is possible to determine whether the vehicle is in the oil filling stage or the pressure relief stage according to the current operating parameters of the vehicle, and when the vehicle is not in the oil filling stage or the pressure relief stage, the target speed of the vehicle's electronic oil pump is determined according to the operating parameters and the current pressure of the vehicle's clutch, and the electronic oil pump is guided by the target speed until the actual pressure of the vehicle's clutch reaches the target pressure, and the pressure regulating characteristics of the throttle hole are used to control the speed of the oil pump to adjust the flow through the throttle hole to achieve the purpose of pressure regulation, with lower cost and weight, fast pressure response, short gear shifting time, high control accuracy, good consistency of control effect, and small calibration workload in the development stage. Thus, the technical problem in the related art that the vehicle needs to have a variety of components, which is high in cost and weight, slow in response speed, affects the gear shifting efficiency, and has poor control accuracy, thereby affecting the user's driving experience is solved.

[0129] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0130] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0131] When the processor 502 executes the program, the clutch pressure control method provided in the above embodiment is implemented.

[0132] Furthermore, the vehicle also includes:

[0133] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0134] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0135] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0136] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0137] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0138] The processor 502 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0139] This embodiment also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the clutch pressure control method as described above is implemented.

[0140] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the clutch pressure control method provided by an embodiment of the present invention.

[0141] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0142] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0143] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0144] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0145] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0146] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0147] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0148] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A clutch pressure control method, characterized in that: The following steps are involved: Get the current operating parameters of the vehicle; Determining whether the vehicle meets a preset oil filling or pressure relief condition based on the current operating parameters; If the vehicle does not meet the preset oil filling or pressure relief conditions, the target speed of the vehicle's electronic oil pump is determined based on the operating parameters and the current pressure of the vehicle's clutch, and the actual speed of the electronic oil pump is adjusted based on the target speed until the actual pressure of the vehicle's clutch reaches the target pressure.

2. The method according to claim 1, characterized in that The determining the target speed of the electronic oil pump of the vehicle based on the operating parameter and the current pressure of the clutch of the vehicle includes: Reading the np characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle; Matching the corresponding basic speed of the electronic oil pump in the np characteristic range table based on the current oil temperature and the target pressure; The target speed is obtained by combining the electronic oil pump base speed, the current oil temperature, the target pressure and the current pressure.

3. The method according to claim 2, characterized in that The adjusting the actual speed of the electronic oil pump based on the target speed until the actual pressure of the clutch of the vehicle reaches the target pressure includes: controlling the electronic oil pump using the target speed, and obtaining the actual pressure of the clutch after a preset operation cycle; determining whether the actual pressure reaches the target pressure; If the actual pressure reaches the target pressure, controlling the electronic oil pump at the target speed; If the actual pressure does not reach the target pressure, the target speed is updated based on the actual pressure, and the electronic oil pump is controlled using the updated target speed until the actual pressure reaches the target pressure.

4. The method according to claim 2, characterized in that: The NP characteristic range table corresponding to the electronic oil pump speed and clutch pressure of the hydraulic system of the vehicle is read, including: Detecting the np characteristic range characteristic value stored in the controller of the electronic oil pump; An NP characteristic range table corresponding to the electronic oil pump speed and clutch pressure is determined based on the stored NP characteristic range characteristic value.

5. The method according to claim 1, characterized in that The determining whether the vehicle meets a preset oil filling or pressure relief condition based on the current operating parameters includes: determining a current driving mode of the vehicle based on the current operating parameters; In the case where the current driving mode is the extended-range mode, determining whether the vehicle meets a preset condition for entering the engine direct drive mode based on the current operating parameters, and in the case where the vehicle meets the preset condition for entering the engine direct drive mode, determining that the vehicle meets a preset oil filling condition; When the current driving mode is the engine direct drive mode, it is determined whether the vehicle meets the preset conditions for entering the Zengcheng mode based on the current operating parameters, and when the vehicle meets the preset conditions for entering the extended-range mode, it is determined that the vehicle meets the preset pressure relief conditions.

6. The method according to claim 1, characterized in that After determining whether the vehicle meets a preset oil filling or pressure relief condition based on the operating parameters, the method further includes: If the vehicle meets the preset oil filling or pressure relief condition, obtaining a judgment result of the vehicle, and controlling the clutch of the vehicle to enter a corresponding control phase based on the judgment result; In the case where the control stage is the oil filling stage, determining the oil filling speed and oil filling time of the electronic oil pump according to the current oil temperature of the vehicle and a preset oil filling basic table, and adjusting the clutch pressure based on the oil filling speed and oil filling time; When the control stage is the pressure relief stage, the pressure relief speed and pressure relief time of the electronic oil pump are determined according to the current oil temperature and a preset pressure relief control table, and the clutch pressure is adjusted based on the pressure relief speed and pressure relief time.

7. The method according to claim 6, characterized in that The target pressure is obtained from the control stage and the clutch transmission torque value.

8. A clutch pressure control device, characterized in that: include: An acquisition module, used to obtain the current operating parameters of the vehicle; A judgment module, used for judging whether the vehicle meets a preset oil filling or pressure relief condition based on the current operating parameters; A control module is used to determine a target speed of the electronic oil pump of the vehicle based on the operating parameters and a current pressure of the clutch of the vehicle when the vehicle does not meet the preset oil filling or pressure relief conditions, and to adjust an actual speed of the electronic oil pump based on the target speed until the actual pressure of the clutch of the vehicle reaches the target pressure.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the clutch pressure control method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the clutch pressure control method as described in any one of claims 1-7.

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