Hybrid vehicle clutch self-learning method, equipment and medium

Abstract

The embodiment of the invention discloses a hybrid vehicle clutch self-learning method and device and a medium, belongs to the technical field of vehicle control, and solves the problem that when a clutch is offline, a one-time learning mode easily causes engine starting overshoot or insufficient power in the environment with large temperature difference. Comprising the steps that when a vehicle is powered on, a clutch sliding friction point self-learning state is entered; in the clutch combining process, the motor rotating speed is detected in real time, and when the motor rotating speed reaches the preset motor rotating speed condition, the current clutch combining position serves as the clutch sliding friction point position; verifying the position of the sliding friction point of the clutch, and determining that the position of the sliding friction point of the clutch is successfully learned under the condition that the verification is passed; when the vehicle is powered off, entering a clutch minimum combination point self-learning state, and taking a corresponding clutch position after the vehicle is powered off as a clutch minimum combination point position; and verifying the position of the minimum combination point of the clutch, and determining that the learning of the position of the minimum combination point of the clutch is successful when the verification is passed.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a hybrid vehicle clutch self-learning method, device and medium. Background Art

[0002] In the vehicle power transmission system, the performance stability of the clutch is crucial, and the position adjustment of the clutch directly affects the vehicle's starting smoothness and power output efficiency.

[0003] Since the clutch position is affected by temperature, especially in plateau areas where the temperature difference between morning, noon and night is large, the position of the clutch slip point and the minimum engagement point changes significantly.

[0004] In the prior art, clutch self-learning technology mainly relies on a one-time learning process when the vehicle is offline, that is, the clutch is calibrated once during vehicle production or maintenance. However, this one-time learning method is difficult to ensure that the clutch can maintain the best working state in different time periods due to the large temperature difference in the plateau area, because the position of the slip point and the minimum engagement point varies greatly with temperature, which can easily cause problems such as engine overshoot or insufficient power when starting. Summary of the invention

[0005] The embodiments of the present application provide a hybrid vehicle clutch self-learning method, device and medium for solving the following technical problems: In the prior art, the one-time learning method of the clutch when it is offline is difficult to ensure that the clutch can maintain the best working state in different time periods when facing an environment with a large temperature difference, which can easily cause the engine to overshoot or lack of power when starting.

[0006] The present application embodiment adopts the following technical solutions:

[0007] The embodiment of the present application provides a hybrid vehicle clutch self-learning method. The method includes: when the vehicle is powered on, entering a clutch slip point self-learning state; during the clutch engagement process, detecting the motor speed in real time, and when the motor speed reaches a preset motor speed condition, using the current clutch engagement position as the clutch slip point position; verifying the clutch slip point position based on preset slip point verification data, and determining that the clutch slip point position learning is successful if the verification passes; when the vehicle is powered off, entering a clutch minimum engagement point self-learning state, and using the clutch position corresponding to the vehicle after the power is off as the clutch minimum engagement point position; verifying the clutch minimum engagement point position based on preset minimum engagement point verification data, and determining that the clutch minimum engagement point position learning is successful if the verification passes.

[0008] The embodiment of the present application performs clutch slip point learning when the vehicle is powered on and performs minimum engagement point learning when the vehicle is powered off, thereby increasing the learning frequency of clutch self-learning and preventing the clutch slip point position and minimum engagement point position from changing due to large temperature differences, leading to shift shock or insufficient power. Secondly, the embodiment of the present application detects the learning position after self-learning is completed to ensure the accuracy of the learned slip point and minimum engagement point, and to detect errors in a timely manner, thereby improving the stability and reliability of clutch control.

[0009] In one implementation of the present application, when the motor speed reaches a preset motor speed condition, the current clutch engagement position is used as the clutch slip point position, specifically including: determining a reference time corresponding to when the motor speed reaches a preset motor speed threshold, and comparing the reference time with the preset time threshold; when the reference time is not greater than the preset time threshold, the clutch engagement position corresponding to when the preset motor speed threshold is reached is used as the clutch slip point position; within the preset time threshold, if the motor speed is less than the preset motor speed threshold, the motor speed is marked as failed data acquisition, and a clutch slip point self-learning failure message is issued.

[0010] In one implementation of the present application, the clutch slip point position is verified based on preset slip point verification data, specifically including: comparing the clutch slip point position with the clutch slip point position stored last time, determining a first slip point position difference, and comparing the first slip point position difference with a first position difference threshold; and comparing the clutch slip point position with an initial calibration amount, determining a second slip point position difference, and comparing the second slip point position difference with a second position difference threshold; when the first slip point position difference is not greater than the first position difference threshold, and the second slip point position difference is not greater than the second position difference threshold, it is determined that the clutch slip point position verification is successful.

[0011] In one implementation of the present application, before comparing the first slip point position difference with the first position difference threshold, the method also includes: obtaining the first ambient temperature value of the vehicle corresponding to the time when the previous clutch slip point position was stored, and obtaining the second ambient temperature value of the vehicle; determining the temperature difference between the first ambient temperature value and the second ambient temperature value; inputting the temperature difference into a preset slip point position prediction model to output a slip point position change value corresponding to the temperature difference through the preset slip point position prediction model; using the slip point position change value as the first position difference threshold to compare the first slip point position difference with the first position difference threshold.

[0012] In one implementation of the present application, the clutch position corresponding to when the vehicle is powered off is used as the clutch's minimum engagement point position, specifically including: after the vehicle is powered off, starting the first power-off duration timing; when a clutch closing instruction is received during the first power-off duration timing, determining the clutch position, and using the clutch position as the clutch's minimum engagement point position.

[0013] In one implementation of the present application, after starting the first power-off timer, the method also includes: when the first power-off timer reaches the first preset timer and no clutch closing instruction is received, starting the second power-off timer; after the second power-off timer reaches the second preset timer, determining the clutch position, and using the clutch position as the clutch minimum engagement point position.

[0014] In one implementation of the present application, the clutch minimum engagement point position is verified based on preset minimum engagement point verification data, specifically including: comparing the clutch minimum engagement point position with the clutch minimum engagement point position stored last time, determining a first minimum engagement point position difference, and comparing the first minimum engagement point position difference with a third position difference threshold; and comparing the clutch minimum engagement point position with an initial calibration value, determining a second minimum engagement point position difference, and comparing the second minimum engagement point position difference with a fourth position difference threshold; when the first minimum engagement point position difference is not greater than the third position difference threshold, and the second minimum engagement point position difference is not greater than the fourth position difference threshold, it is determined that the clutch minimum engagement point position verification is successful.

[0015] In one implementation of the present application, before comparing the first minimum engagement point position difference with the third position difference threshold, the method also includes: obtaining the third ambient temperature value of the vehicle corresponding to the time when the previous clutch minimum engagement point position was stored, and obtaining the fourth ambient temperature value of the vehicle currently in; determining the temperature difference between the third ambient temperature value and the fourth ambient temperature value; inputting the temperature difference into a preset minimum engagement point position prediction model to output the minimum engagement point position change value corresponding to the temperature difference through the preset minimum engagement point position prediction model; using the minimum engagement point position change value as the third position difference threshold to compare the first minimum engagement point position difference with the third position difference threshold.

[0016] An embodiment of the present application provides a hybrid vehicle clutch self-learning device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can: enter a clutch slip point self-learning state when the vehicle is powered on; during the clutch engagement process, detect the motor speed in real time, and when the motor speed reaches a preset motor speed condition, use the current clutch engagement position as the clutch slip point position; verify the clutch slip point position based on preset slip point verification data, and determine that the clutch slip point position learning is successful if the verification passes; enter a clutch minimum engagement point self-learning state when the vehicle is powered off, and use the clutch position corresponding to the vehicle after the power is off as the clutch minimum engagement point position; verify the clutch minimum engagement point position based on preset minimum engagement point verification data, and determine that the clutch minimum engagement point position learning is successful if the verification passes.

[0017] A non-volatile computer storage medium provided in an embodiment of the present application stores computer executable instructions, wherein the computer executable instructions are configured to: when the vehicle is powered on, enter a clutch slip point self-learning state; during the clutch engagement process, detect the motor speed in real time, and when the motor speed reaches a preset motor speed condition, use the current clutch engagement position as the clutch slip point position; verify the clutch slip point position based on preset slip point verification data, and determine that the clutch slip point position has been successfully learned if the verification passes; when the vehicle is powered off, enter a clutch minimum engagement point self-learning state, and use the clutch position corresponding to the time after the vehicle is powered off as the clutch minimum engagement point position; verify the clutch minimum engagement point position based on preset minimum engagement point verification data, and determine that the clutch minimum engagement point position has been successfully learned if the verification passes.

[0018] At least one of the above technical solutions adopted in the embodiment of the present application can achieve the following beneficial effects: the embodiment of the present application performs clutch slip point learning when the vehicle is powered on and the engine is started, and performs minimum engagement point learning when the vehicle is powered off, thereby increasing the learning frequency of clutch self-learning and preventing the clutch slip point position and minimum engagement point position from changing due to large temperature differences, resulting in shift shock or insufficient power. Secondly, the embodiment of the present application detects the learning position after self-learning is completed to ensure the accuracy of the learned slip point and minimum engagement point, and can detect errors in a timely manner, thereby improving the stability and reliability of clutch control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0020] Figure 1 A flow chart of a hybrid vehicle clutch self-learning method provided in an embodiment of the present application;

[0021] Figure 2 A schematic structural diagram of a hybrid vehicle clutch self-learning device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] Embodiments of the present application provide a hybrid vehicle clutch self-learning method, device and medium.

[0023] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0024] The technical solution proposed in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0025] Figure 1 A flow chart of a hybrid vehicle clutch self-learning method provided in an embodiment of the present application, such as Figure 1 As shown, the hybrid vehicle clutch self-learning method includes the following steps:

[0026] S101. When the vehicle is powered on, the clutch slip point self-learning state is entered.

[0027] In one embodiment of the present application, the embodiment of the present application is applicable to a P2 hybrid vehicle. The structure of the hybrid vehicle is that the engine is connected to the clutch, the clutch is connected to the motor, and the motor is connected to the gearbox. When the vehicle key is started, the engine will start first and then stop. Therefore, the entry condition for clutch self-learning in the embodiment of the present application is that the clutch self-learning state is entered when the key starts the vehicle and the engine.

[0028] Specifically, in the embodiment of the present application, the vehicle key is used to start and trigger the engine start as the entry condition for clutch self-learning. Therefore, each time the vehicle is started from a completely stationary state and enters the ready-to-drive state through key start, the clutch self-learning function will be activated. By performing clutch self-learning at each start and increasing the vehicle clutch self-learning frequency, it can be ensured that the working state of the clutch is always maintained at the optimal state. Even if the vehicle has a large temperature difference or its performance has declined after long-term use, it can be compensated to a certain extent through self-learning, thereby ensuring that the clutch of the vehicle can maintain the optimal working state in different environments at different time periods.

[0029] S102, during the clutch engagement process, detecting the motor speed in real time, and when the motor speed reaches a preset motor speed condition, using the current clutch engagement position as the clutch slip point position.

[0030] In one embodiment of the present application, after entering the clutch self-learning, the actuator is controlled to slowly close the clutch. As the clutch slowly engages, when the clutch position engages to the slip point, the engine drives the clutch to make the motor generate a rotation speed. At this time, the position of the clutch slip point is confirmed based on the rotation speed generated by the motor.

[0031] In one embodiment of the present application, a reference duration corresponding to when the motor speed reaches a preset motor speed threshold is determined, and the reference duration is compared with the preset duration threshold. When the reference duration is not greater than the preset duration threshold, the clutch engagement position corresponding to when the preset motor speed threshold is reached is used as the clutch slip point position. Within the preset duration threshold, if the motor speed is less than the preset motor speed threshold, the motor speed is marked as acquisition failure data, and a clutch slip point self-learning failure message is issued.

[0032] Specifically, the preset motor speed threshold in the embodiment of the present application is a specific speed value used to determine whether the motor has reached the expected speed level. Its value is relatively small, for example, it can be set to 20RPM. From the time the motor starts to the moment when the motor speed reaches the preset motor speed threshold, this period of time is the reference duration, which is used to evaluate the efficiency of the motor reaching the preset speed. If the reference duration is less than or equal to the preset duration threshold, it means that the response speed of the motor is within an acceptable range, and the next step of clutch engagement position judgment can be continued. If the reference duration is greater than the preset duration threshold, but the motor speed has not reached the preset motor speed threshold within the preset duration threshold, error handling is required.

[0033] Furthermore, when the motor speed reaches the preset motor speed threshold within the preset time threshold, the clutch engagement position at this time is recorded as the clutch slip point position. If the motor speed still fails to reach the preset motor speed threshold within the preset time threshold, the motor speed data is marked as acquisition failure data, and the system will issue a message indicating that the clutch slip point self-learning failed, indicating that further diagnosis or maintenance is required.

[0034] S103, verifying the clutch slip point position based on preset slip point verification data, and determining that the clutch slip point position learning is successful if the verification passes.

[0035] In one embodiment of the present application, a first ambient temperature value of the vehicle corresponding to the last clutch slip point position is obtained, and a second ambient temperature value of the vehicle is currently obtained. A temperature difference between the first ambient temperature value and the second ambient temperature value is determined. The temperature difference is input into a preset slip point position prediction model, so that a slip point position change value corresponding to the temperature difference is output through the preset slip point position prediction model. The slip point position change value is used as a first position difference threshold value, so that the first slip point position difference value is compared with the first position difference threshold value.

[0036] Specifically, the embodiment of the present application will record and store the ambient temperature of the vehicle when the last clutch slip point position was located, i.e., the first ambient temperature value, and will also obtain the ambient temperature of the vehicle currently located, i.e., the second ambient temperature value. According to the first ambient temperature value and the second ambient temperature value, the temperature difference between the two is calculated. The embodiment of the present application is provided with a preset slip point position prediction model, which can predict the possible changes in the clutch slip point position according to the temperature difference. The training process of the model is to use the historical temperature difference as an input sample, and the historical slip point position change value corresponding to the input sample as an output sample, and train the preset neural network model through the input sample and the output sample to obtain the preset slip point position prediction model.

[0037] Furthermore, the currently calculated temperature difference is input into the preset friction point position prediction model, and a corresponding friction point position change value is outputted by the preset friction point position prediction model. This friction point position change value is used as a new first position difference threshold value for subsequent comparison with the first friction point position difference value.

[0038] In one embodiment of the present application, the clutch slip point position is compared with the clutch slip point position stored last time to determine a first slip point position difference, and the first slip point position difference is compared with a first position difference threshold, and the clutch slip point position is compared with an initial calibration amount to determine a second slip point position difference, and the second slip point position difference is compared with a second position difference threshold. When the first slip point position difference is not greater than the first position difference threshold, and the second slip point position difference is not greater than the second position difference threshold, it is determined that the clutch slip point position verification is successful.

[0039] Specifically, after learning the slip point position, position verification is performed. The currently learned clutch slip point position is compared with the last stored clutch slip point position, and the comparison result does not exceed the threshold value. At the same time, it is compared with the initial calibration quantity, and the comparison result does not exceed the threshold value. It is considered that the clutch slip point learning is successful. At this time, the controller stores it, and the vehicle exits the clutch self-learning state and enters the vehicle preparation state.

[0040] Specifically, in the embodiment of the present application, after the clutch learning is completed each time, the clutch slip point position successfully learned each time is stored. When the new clutch slip point position is learned, it will be compared with the position stored last time, and the difference between the two, i.e., the first slip point position difference, is calculated. The initial calibration quantity in the embodiment of the present application is the slip point position determined by the clutch when it leaves the factory or is calibrated for the first time. The newly learned clutch slip point position is compared with the initial calibration quantity, and the difference between the two, i.e., the second slip point position difference, is calculated. The first slip point position difference needs to be compared with the first position difference threshold to determine whether the difference between the new position and the last stored position is within an acceptable range, and the second slip point position difference needs to be compared with the second position difference threshold to determine whether the difference between the new position and the initial calibration quantity is within an acceptable range. Only when the first slip point position difference is not greater than the first position difference threshold, and the second slip point position difference is not greater than the second position difference threshold, will the system determine that the clutch slip point position verification is successful.

[0041] For example, suppose that an electric vehicle's automatic transmission system is calibrating the clutch slip point position. The previously stored clutch slip point position is 10 mm, the initial calibration amount is 9 mm, the first position difference threshold is ±0.5 mm, and the second position difference threshold is ±1.5 mm. The learned clutch slip point position is 10.2 mm. Compared with the previously stored position, the first slip point position difference is 0.2 mm, which is not greater than the first position difference threshold ±0.5 mm. Compared with the initial calibration amount, the second slip point position difference is 1.2 mm, which is not greater than the second position difference threshold ±1.5 mm. Therefore, it is determined that the clutch slip point position calibration is successful.

[0042] S104: When the vehicle is powered off, the clutch minimum engagement point self-learning state is entered, and the clutch position corresponding to the vehicle power-off is used as the clutch minimum engagement point position.

[0043] In one embodiment of the present application, after the vehicle is powered off, a first power-off duration timing is started. When a clutch closing instruction is received during the first power-off duration timing, the clutch position is determined and used as the clutch minimum engagement point position.

[0044] Specifically, when the vehicle is in a power-off state, the system will start a timer, namely the first power-off duration timing. During the timing process, if an instruction indicating that the clutch is closed is received, it indicates that the clutch is closed. At this time, the current position of the clutch is immediately determined and the clutch position is used as the minimum engagement point position of the clutch.

[0045] In one embodiment of the present application, when the first power-off duration is counted to the first preset duration and no clutch closing instruction is received, the second power-off duration is started. After the second power-off duration is counted to the second preset duration, the clutch position is determined and the clutch position is used as the clutch minimum engagement point position.

[0046] Specifically, if the clutch closing instruction is not received during the first power-off duration timing process, and the timing reaches the first preset duration, the next stage is entered, that is, another timer is started after the first power-off duration timing ends, that is, the second power-off duration timing is started. The purpose of the second power-off duration timing is to wait further to ensure that the clutch is stably at the minimum engagement point. After the second power-off duration timing ends, the sensor data related to the clutch is read to determine the current position of the clutch, and the clutch position read at this time is used as the minimum engagement point position of the clutch.

[0047] S105, verifying the clutch minimum engagement point position based on preset minimum engagement point verification data, and determining that the clutch minimum engagement point position learning is successful if the verification passes.

[0048] In one embodiment of the present application, a third ambient temperature value of the vehicle corresponding to the last clutch minimum engagement point position is obtained, and a fourth ambient temperature value of the vehicle is currently obtained. The temperature difference between the third ambient temperature value and the fourth ambient temperature value is determined. The temperature difference is input into a preset minimum engagement point position prediction model to output a minimum engagement point position change value corresponding to the temperature difference through the preset minimum engagement point position prediction model. The minimum engagement point position change value is used as a third position difference threshold value to compare the first minimum engagement point position difference value with the third position difference threshold value.

[0049] Specifically, when the clutch minimum engagement point position is stored, the ambient temperature value at that time is recorded at the same time. When the clutch minimum engagement point position is verified, the temperature value corresponding to the last time the clutch minimum engagement point position was stored, i.e., the third ambient temperature value, is obtained, and the ambient temperature value of the vehicle currently located, i.e., the fourth ambient temperature value, is obtained. The difference between the third ambient temperature value and the fourth ambient temperature value is calculated to obtain the temperature difference value. The temperature difference value reflects the change of the ambient temperature.

[0050] Furthermore, the calculated temperature difference is input into the preset minimum engagement point position prediction model, and the preset minimum engagement point position prediction model will output a predicted minimum engagement point position change value according to the input temperature difference. The training process of the preset minimum engagement point position prediction model is to use the temperature environment difference corresponding to the historical storage of the minimum engagement point as an input sample, and the historical minimum engagement point position change value corresponding to the input sample as an output sample, and train the preset neural network model to obtain the preset minimum engagement point position prediction model. The predicted minimum engagement point position change value is used as the third position difference threshold when verifying the clutch minimum engagement point position.

[0051] In one embodiment of the present application, the clutch minimum engagement point position is compared with the clutch minimum engagement point position stored last time to determine a first minimum engagement point position difference, and the first minimum engagement point position difference is compared with a third position difference threshold; and the clutch minimum engagement point position is compared with an initial calibration value to determine a second minimum engagement point position difference, and the second minimum engagement point position difference is compared with a fourth position difference threshold. When the first minimum engagement point position difference is not greater than the third position difference threshold, and the second minimum engagement point position difference is not greater than the fourth position difference threshold, it is determined that the clutch minimum engagement point position verification is successful.

[0052] Specifically, after the clutch minimum engagement point position is determined each time, it is compared with the clutch minimum engagement point position stored last time, and the difference between the two is calculated to obtain the first minimum engagement point position difference. The calculated first minimum engagement point position difference is compared with the third position difference threshold. If the first minimum engagement point position difference is not greater than the third position difference threshold, it is considered that the clutch minimum engagement point position meets the current comparison requirements. Secondly, the embodiment of the present application will also compare the clutch minimum engagement point position with the initial calibration quantity, wherein the initial calibration quantity is the standard position of the clutch minimum engagement point measured by professional equipment during vehicle manufacturing or maintenance, and the difference between the clutch minimum engagement point position and the initial calibration quantity is calculated to obtain the second minimum engagement point position difference.

[0053] Furthermore, the calculated second minimum engagement point position difference is compared with a fourth position difference threshold value. If the second minimum engagement point position difference is not greater than the fourth position difference threshold value, it is considered that the clutch minimum engagement point position meets the current requirements.

[0054] Further, if the first minimum engagement point position difference is not greater than the third position difference threshold, and the second minimum engagement point position difference is not greater than the fourth position difference threshold, it is determined that the verification of the clutch minimum engagement point position is successful.

[0055] The embodiment of the present application performs clutch slip point learning when the key is powered on and the engine is started, and performs clutch minimum engagement point learning when the key is powered off, thereby increasing the learning frequency of clutch self-learning. This solves the problem that the clutch is affected by temperature and causes vehicle shift failure, shift shock or insufficient power, thereby increasing the shift success rate, improving the smoothness of vehicle driving, and reducing impact force.

[0056] Figure 2 This is a schematic diagram of the structure of a hybrid vehicle clutch self-learning device provided in an embodiment of the present application. Figure 2 As shown, a hybrid vehicle clutch self-learning device comprises: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can: enter a clutch slip point self-learning state when the vehicle is powered on; during the clutch engagement process, detect the motor speed in real time, and when the motor speed reaches a preset motor speed condition, use the current clutch engagement position as the clutch slip point position; verify the clutch slip point position based on preset slip point verification data, and determine that the clutch slip point position learning is successful if the verification passes; enter a clutch minimum engagement point self-learning state when the vehicle is powered off, and use the clutch position corresponding to the vehicle after the power is off as the clutch minimum engagement point position; verify the clutch minimum engagement point position based on preset minimum engagement point verification data, and determine that the clutch minimum engagement point position learning is successful if the verification passes.

[0057] A non-volatile computer storage medium provided in an embodiment of the present application stores computer executable instructions, wherein the computer executable instructions are configured to: when the vehicle is powered on, enter a clutch slip point self-learning state; during the clutch engagement process, detect the motor speed in real time, and when the motor speed reaches a preset motor speed condition, use the current clutch engagement position as the clutch slip point position; verify the clutch slip point position based on preset slip point verification data, and determine that the clutch slip point position has been successfully learned if the verification passes; when the vehicle is powered off, enter a clutch minimum engagement point self-learning state, and use the clutch position corresponding to the time after the vehicle is powered off as the clutch minimum engagement point position; verify the clutch minimum engagement point position based on preset minimum engagement point verification data, and determine that the clutch minimum engagement point position has been successfully learned if the verification passes.

[0058] Each embodiment in this application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0059] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the embodiments of the present application may have various changes and variations. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A hybrid vehicle clutch self-learning method, characterized in that: The method comprises: When the vehicle is powered on, the clutch slip point self-learning state is entered; During the clutch engagement process, the motor speed is detected in real time, and when the motor speed reaches a preset motor speed condition, the current clutch engagement position is used as the clutch slip point position; Verifying the clutch slip point position based on preset slip point verification data, and determining that the clutch slip point position learning is successful if the verification passes; When the vehicle is powered off, the clutch enters the minimum engagement point self-learning state, and the clutch position corresponding to the vehicle power-off is used as the clutch minimum engagement point position; The clutch minimum engagement point position is verified based on preset minimum engagement point verification data, and if the verification passes, it is determined that the clutch minimum engagement point position learning is successful.

2. A hybrid vehicle clutch self-learning method according to claim 1, characterized in that: When the motor speed reaches the preset motor speed condition, taking the current clutch engagement position as the clutch slip point position specifically includes: Determine a reference time duration corresponding to when the motor speed reaches a preset motor speed threshold, and compare the reference time duration with the preset time duration threshold; When the reference time is not greater than the preset time threshold, the clutch engagement position corresponding to when the preset motor speed threshold is reached is used as the clutch slip point position; Within the preset time threshold, if the motor speed is less than the preset motor speed threshold, the motor speed is marked as acquisition failure data, and clutch slip point self-learning failure information is issued.

3. A hybrid vehicle clutch self-learning method according to claim 1, characterized in that: The verifying the clutch slip point position based on the preset slip point verification data specifically includes: Comparing the clutch slip point position with the clutch slip point position stored last time to determine a first slip point position difference, and comparing the first slip point position difference with a first position difference threshold; and Comparing the clutch slip point position with an initial calibration value to determine a second slip point position difference, and comparing the second slip point position difference with a second position difference threshold; When the first slip point position difference is not greater than the first position difference threshold, and the second slip point position difference is not greater than the second position difference threshold, it is determined that the clutch slip point position verification is successful.

4. A hybrid vehicle clutch self-learning method according to claim 3, characterized in that: Before comparing the first sliding point position difference with the first position difference threshold, the method further includes: Obtaining a first ambient temperature value of the vehicle corresponding to the last clutch slip point position stored, and obtaining a second ambient temperature value of the vehicle currently in; determining a temperature difference between the first ambient temperature value and the second ambient temperature value; Inputting the temperature difference into a preset sliding point position prediction model, so as to output a sliding point position change value corresponding to the temperature difference through the preset sliding point position prediction model; The friction point position change value is used as the first position difference threshold value, so as to compare the first friction point position difference value with the first position difference threshold value.

5. The hybrid vehicle clutch self-learning method according to claim 1, characterized in that: The method of using the clutch position corresponding to when the vehicle is powered off as the clutch minimum engagement point position specifically includes: After the vehicle is powered off, the first power-off duration timer starts; When a clutch closing instruction is received during the first power-off duration timing process, the clutch position is determined and used as the clutch minimum engagement point position.

6. A hybrid vehicle clutch self-learning method according to claim 5, characterized in that: After starting the first power-off duration timing, the method further includes: When the first power-off duration is counted to a first preset duration and the clutch closing instruction is not received, starting the second power-off duration timing; After the second power-off time reaches a second preset time, the clutch position is determined, and the clutch position is used as the clutch minimum engagement point position.

7. A hybrid vehicle clutch self-learning method according to claim 1, characterized in that: The verifying the minimum engagement point position of the clutch based on the preset minimum engagement point verification data specifically includes: Comparing the clutch minimum engagement point position with the previously stored clutch minimum engagement point position to determine a first minimum engagement point position difference, and comparing the first minimum engagement point position difference with a third position difference threshold; and Comparing the clutch minimum engagement point position with an initial calibration value to determine a second minimum engagement point position difference, and comparing the second minimum engagement point position difference with a fourth position difference threshold; When the first minimum engagement point position difference is not greater than the third position difference threshold, and the second minimum engagement point position difference is not greater than the fourth position difference threshold, it is determined that the clutch minimum engagement point position verification is successful.

8. A hybrid vehicle clutch self-learning method according to claim 7, characterized in that: Before comparing the first minimum binding point position difference with the third position difference threshold, the method further includes: Obtaining a third ambient temperature value of the vehicle corresponding to the last storage of the clutch minimum engagement point position, and obtaining a fourth ambient temperature value of the vehicle currently in; determining a temperature difference between the third ambient temperature value and the fourth ambient temperature value; Inputting the temperature difference into a preset minimum binding point position prediction model, so as to output a minimum binding point position change value corresponding to the temperature difference through the preset minimum binding point position prediction model; The minimum combination point position change value is used as the third position difference threshold, so as to compare the first minimum combination point position difference with the third position difference threshold.

9. A hybrid vehicle clutch self-learning device, characterized in that: The device comprises a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the device is triggered to execute the method according to any one of claims 1 to 8.

10. A non-volatile computer storage medium storing computer executable instructions, characterized in that: The computer executable instructions can execute the method according to any one of claims 1 to 8.

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