Clutch torque detection method and device, storage medium and electronic device

Abstract

The application discloses a clutch torque detection method and device, a storage medium and an electronic device, and relates to the technical field of automation. The method comprises the following steps: acquiring the gear ratio of a transmission, the input rotating speed of the transmission and a preset rotating speed difference, wherein the preset rotating speed difference is used for reflecting the rotating speed difference between the driving end and the driven end of a to-be-detected clutch; determining the test gear of the to-be-detected clutch according to the gear ratio of the transmission, wherein the test gear is the gear with the maximum torque of the to-be-detected clutch; determining the output rotating speed of the transmission according to the input rotating speed, the preset rotating speed difference and the gear ratio of the transmission under the test gear; performing pressure test on the to-be-detected clutch based on the input rotating speed and the output rotating speed and any pressure value, and obtaining a target input motor torque; and determining the target torque of the to-be-detected clutch under any pressure value according to the gear ratio of the transmission and the target input motor torque. The application solves the technical problem of inaccurate torque transmission capacity test of the clutch in the related art.

Description

Technical Field

[0001] This application relates to the field of automation technology, and more specifically, to a clutch torque detection method, apparatus, storage medium, and electronic device. Background Technology

[0002] In the automotive technology field, the clutch, as a core component of the automatic transmission, directly affects the transmission's shifting performance and the overall driving experience. Currently, the clutch's torque transmission capability primarily relies on test data of the torque transmission capability of individual clutches from suppliers for transmission shift calibration.

[0003] However, the individual test data obtained by the clutch unit in the supplier's testing environment is not accurate enough and cannot fully reflect the clutch's torque transmission capability in the complex internal environment of the transmission.

[0004] No effective solution has yet been proposed to address the above issues. Summary of the Invention

[0005] This application provides a clutch torque detection method, apparatus, storage medium, and electronic device to at least solve the technical problem of inaccurate clutch torque transmission capability testing in related technologies.

[0006] According to one embodiment of this application, a clutch torque detection method is provided, comprising: acquiring the gear ratio of a transmission, the input speed of the transmission, and a preset speed difference, wherein the preset speed difference is used to reflect the speed difference between the driving end and the driven end of the clutch under test; determining the test gear of the clutch under test according to the gear ratio of the transmission, wherein the test gear is the gear with the highest torque of the clutch under test; determining the output speed of the transmission according to the input speed, the preset speed difference, and the gear ratio of the transmission in the test gear; performing a pressure test on the clutch under test based on the input speed, the output speed, and any pressure value to obtain a target input motor torque; and determining the target torque of the clutch under test at any pressure value according to the gear ratio of the transmission and the target input motor torque.

[0007] Optionally, determining the test gear of the clutch under test based on the gear ratio of the transmission includes: determining multiple initial torques of the clutch under test in each gear based on the gear ratio of the transmission; determining the maximum initial torque based on the multiple initial torques; and determining the test gear based on the gear corresponding to the maximum initial torque.

[0008] Optionally, the output speed of the transmission is determined based on the input speed, the preset speed difference, and the transmission gear ratio, including: determining the driving end speed of the clutch under test based on the input speed and the transmission gear ratio; determining the driven end speed of the clutch under test based on the driving end speed and the preset speed difference; and determining the output speed based on the driven end speed and the transmission gear ratio.

[0009] Optionally, the clutch under test is pressurized based on the input speed, output speed, and any pressure value to obtain the target input motor torque, including: determining multiple pressure values ​​to be tested based on test requirements; and pressurizing the clutch under test sequentially according to a preset order based on the input speed, output speed, and multiple pressure values ​​to obtain the target input motor torque corresponding to any pressure value.

[0010] Optionally, before performing a pressure test on the clutch under test based on the input speed, output speed, and any pressure value to obtain the target input motor torque, the method further includes: controlling the vehicle to a preset operating condition based on the test gear; determining the first input motor torque based on the preset operating condition, input speed, and output speed; performing a preliminary test on the clutch under test based on the initial pressure value to obtain the second input motor torque, wherein the second input motor torque is greater than the first input motor torque; and determining the operating state of the clutch under test based on the first input motor torque and the second input motor torque.

[0011] Optionally, the target torque of the clutch under test at any pressure value is determined based on the gear ratio of the transmission and the target input motor torque, including: determining the torque distribution ratio of the test gear based on the gear ratio of the transmission; and determining the target torque of the clutch under test at any pressure value based on the torque distribution ratio and the target input motor torque.

[0012] Optionally, the clutch torque detection method further includes: determining the pressure-torque correspondence curve of the clutch under test based on any pressure value and the target torque corresponding to any pressure value.

[0013] According to one embodiment of this application, a clutch torque control method is provided, comprising: acquiring a requested torque and the torque distribution ratio of the current gear; determining a target requested torque of the clutch based on the requested torque and the torque distribution ratio; determining a target pressure value corresponding to the clutch based on the target requested torque and a pressure-torque correspondence curve, wherein the pressure-torque correspondence curve is determined based on the clutch torque detection method described above; and controlling the clutch pressure value to be maintained at the target pressure value based on gear adjustment requirements.

[0014] Optionally, maintaining the clutch pressure at a target pressure value includes: increasing the clutch pressure by a first value in response to the input motor torque of the transmission being less than the requested torque; or decreasing the clutch pressure by a first value in response to the input motor torque being greater than the requested torque.

[0015] Optionally, the clutch torque control method further includes: acquiring the vehicle speed and engine speed of the target vehicle; determining the predicted engine speed value at a first moment based on the rate of change of engine speed; determining the engine speed matching value at the first moment based on the vehicle speed and the current gear; and increasing the clutch pressure by a second value in response to the prediction that the difference between the predicted speed value and the speed matching value is greater than a preset threshold at a second moment, wherein the second moment is later than the first moment.

[0016] According to one embodiment of this application, a clutch torque detection device is also provided. The device includes: a first acquisition module, used to acquire the gear ratio of the transmission, the input speed of the transmission, and a preset speed difference, wherein the preset speed difference reflects the speed difference between the driving end and the driven end of the clutch under test; a first determination module, used to determine the test gear of the clutch under test based on the gear ratio of the transmission, wherein the test gear is the gear with the highest torque of the clutch under test; a second determination module, used to determine the output speed of the transmission based on the input speed, the preset speed difference, and the gear ratio of the transmission at the test gear; a testing module, used to perform a pressure test on the clutch under test based on the input speed, the output speed, and any pressure value to obtain the target input motor torque; and a third determination module, used to determine the target torque of the clutch under test at any pressure value based on the gear ratio of the transmission and the target input motor torque.

[0017] Optionally, the first determining module is further configured to determine multiple initial torques of the clutch under test in each gear based on the gear ratio of the transmission; determine the maximum initial torque based on the multiple initial torques; and determine the test gear based on the gear corresponding to the maximum initial torque.

[0018] Optionally, the second determining module is further configured to determine the driving end speed of the clutch under test based on the input speed and the gear ratio of the transmission; determine the driven end speed of the clutch under test based on the driving end speed and the preset speed difference; and determine the output speed based on the driven end speed and the gear ratio of the transmission.

[0019] Optionally, the testing module is also used to determine multiple pressure values ​​to be tested based on testing requirements; based on the input speed, output speed and multiple pressure values ​​to be tested, the clutch to be tested is pressurized in sequence according to a preset order to obtain the target input motor torque corresponding to any pressure value.

[0020] Optionally, the testing module is also used to control the vehicle to a preset operating condition based on the test gear; determine the first input motor torque based on the preset operating condition, input speed, and output speed; perform a preliminary test on the clutch under test based on the initial pressure value to obtain the second input motor torque, wherein the second input motor torque is greater than the first input motor torque; and determine the working state of the clutch under test based on the first input motor torque and the second input motor torque.

[0021] Optionally, the third determining module is also used to determine the torque distribution ratio of the test gear based on the gear ratio of the transmission; and to determine the target torque of the clutch under test at any pressure value based on the torque distribution ratio and the target input motor torque.

[0022] Optionally, the third determining module is also used to determine the pressure-torque correspondence curve of the clutch under test based on any pressure value and the target torque corresponding to any pressure value.

[0023] According to one embodiment of this application, a clutch torque control device is also provided. The device includes: a second acquisition module, configured to acquire a requested torque and the torque distribution ratio of the current gear; a fourth determination module, configured to determine a target requested torque of the clutch based on the requested torque and the torque distribution ratio; a fifth determination module, configured to determine a target pressure value corresponding to the clutch based on the target requested torque and a pressure-torque correlation curve, wherein the pressure-torque correlation curve is determined based on the clutch torque detection method described above; and a control module, configured to control the clutch pressure value to maintain at the target pressure value based on gear adjustment requirements.

[0024] Optionally, the control module is further configured to increase the clutch pressure by a first value in response to the input motor torque of the transmission being less than the requested torque; or, in response to the input motor torque being greater than the requested torque, decrease the clutch pressure by a first value.

[0025] Optionally, the control module is also used to acquire the vehicle speed and engine speed of the target vehicle; determine the predicted engine speed value at the first moment based on the rate of change of engine speed; determine the engine speed matching value at the first moment based on the vehicle speed and the current gear; and increase the clutch pressure by a second value in response to the prediction that the difference between the predicted speed value and the speed matching value is greater than a preset threshold at the second moment, wherein the second moment is later than the first moment.

[0026] According to one embodiment of this application, a computer-readable storage medium is also provided, wherein the storage medium stores a computer program, wherein the computer program is configured to execute the clutch torque detection method described above when running on a computer or processor.

[0027] According to one embodiment of this application, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the clutch torque detection method described in any of the preceding claims.

[0028] According to one embodiment of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the clutch torque detection method described in any of the above claims.

[0029] In this embodiment, the technical solution first obtains the transmission gear ratio, the transmission input speed, and a preset speed difference, where the preset speed difference reflects the speed difference between the driving and driven ends of the clutch under test. Next, the test gear of the clutch under test is determined based on the transmission gear ratio, wherein the test gear is the gear with the highest torque. Then, at the test gear, the transmission output speed is determined based on the input speed, the preset speed difference, and the transmission gear ratio. Next, a pressure test is performed on the clutch under test based on the input and output speeds and any pressure value to obtain the target input motor torque. Finally, the target torque of the clutch under test at any pressure value is determined based on the transmission gear ratio and the target input motor torque. This overall technical solution achieves the goal of accurately measuring and controlling the torque transmission capability of an automatic transmission clutch, thereby realizing the technical effect of evaluating and optimizing the clutch's torque transmission capability under near-real vehicle operating conditions, and thus solving the technical problem of inaccurate clutch torque transmission capability testing in related technologies. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 This is a flowchart of a clutch torque detection method according to one embodiment of this application;

[0032] Figure 2 This is a flowchart of a gear selection method according to one embodiment of this application;

[0033] Figure 3 This is a flowchart of a clutch speed difference determination method according to one embodiment of this application;

[0034] Figure 4 This is a simplified structural diagram of a test device according to one embodiment of this application;

[0035] Figure 5 This is a flowchart of a torque transmission capability testing method according to one embodiment of this application;

[0036] Figure 6 This is a flowchart of a torque calculation method according to one embodiment of this application;

[0037] Figure 7 This is a flowchart of a clutch torque control method according to one embodiment of this application;

[0038] Figure 8 This is a structural block diagram of a clutch torque detection device according to one embodiment of this application;

[0039] Figure 9 This is a structural block diagram of a clutch torque control device according to one embodiment of this application. Detailed Implementation

[0040] For ease of understanding, some concepts related to the embodiments of this application are illustrated and explained by way of example.

[0041] As shown below:

[0042] Automatic Transmission (AT): A vehicle transmission device that can automatically change the gear ratio. It is mainly used in automobiles and achieves automatic gear shifting through hydraulic control and planetary gear mechanism to adapt to different driving conditions.

[0043] Clutch torque transmission capability: refers to the maximum torque that a clutch can transmit under a specific pressure.

[0044] Transmission input torque: The torque applied at the input end of the transmission, typically output by the engine or electric motor. The transmission adjusts the output torque by changing the gear ratio to adapt to the vehicle's needs under different driving conditions.

[0045] Dragging torque: The difference in torque between the input and output shafts when the clutch is not fully engaged.

[0046] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. In the description of the embodiments, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] According to one embodiment of this application, an embodiment of a clutch torque detection method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0049] This method embodiment can be executed in an electronic device, similar control device, or system that includes a memory and a processor. Taking an electronic device as an example, the electronic device may include one or more processors and a memory for storing data. Optionally, the electronic device may also include a communication device for communication functions and a display device. Those skilled in the art will understand that the above structural description is merely illustrative and does not limit the structure of the electronic device. For example, the electronic device may include more or fewer components than described above, or have a different configuration than described above.

[0050] A processor may include one or more processing units. For example, a processor may include a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field-programmable gate array (FPGA), a neural network processing unit (NPU), a tensor processing unit (TPU), or an artificial intelligence (AI) processor. Different processing units may be independent components or integrated into one or more processors. In some instances, electronic devices may also include one or more processors.

[0051] The memory can be used to store computer programs, such as the computer program corresponding to the clutch torque detection method in the embodiments of this application. The processor implements the clutch torque detection method by running the computer program stored in the memory. The memory may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to electronic devices via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0052] Communication devices are used to receive or send data via a network. Specific examples of such networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the communication device includes a network interface controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the communication device may be a radio frequency (RF) module used for wireless communication with the Internet.

[0053] The display device can be, for example, a touchscreen liquid crystal display (LCD) and a touch display (also referred to as a "touchscreen" or "touch screen"). This LCD allows the user to interact with the user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI), which allows the user to interact with the GUI by touching and / or gesturing on a touch-sensitive surface. Optional human-computer interaction functions include: creating web pages, drawing, word processing, creating electronic documents, playing games, video conferencing, instant messaging, sending and receiving emails, a call interface, playing digital video, playing digital music, and / or web browsing, etc. Executable instructions for performing the above human-computer interaction functions are configured / stored in one or more processor-executable computer program products or readable storage media.

[0054] This embodiment provides a clutch torque detection method operating in an electronic device. Figure 1 This is a flowchart of a clutch torque detection method according to one embodiment of this application, as follows: Figure 1 As shown, the process includes the following steps:

[0055] Step S10: Obtain the gear ratio of the transmission, the input speed of the transmission, and the preset speed difference, wherein the preset speed difference is used to reflect the speed difference between the driving end and the driven end of the clutch under test.

[0056] In this embodiment of the application, the gear ratio of the transmission refers to the ratio of the number of teeth of the gears inside the transmission. Different gear ratios correspond to different gears, and the gear ratio of the transmission determines the speed relationship between the input shaft and the output shaft of the transmission.

[0057] The input speed of a transmission refers to the rotational speed of the transmission input shaft, which is usually determined by the speed of the engine or electric motor. For example, the input speed of the transmission in this application can be set to S1, but this is not a limitation.

[0058] The preset speed difference is a key parameter for testing the torque transmission capability of the clutch under test, reflecting the speed difference between the driving end (usually connected to the engine) and the driven end (connected to the gears inside the transmission). For example, the preset speed difference in this application can be set to Δs. By controlling the preset speed difference, the working state of the clutch during gear shifting can be simulated, thereby testing its torque transmission performance under different pressures.

[0059] The clutch under test refers to the specific clutch whose torque transmission capability needs to be tested.

[0060] In this embodiment of the application, by obtaining the gear ratio of the transmission, the input speed of the transmission, and the preset speed difference, the motor speed on the test equipment can be accurately controlled, thereby effectively simulating the working state inside the transmission.

[0061] Step S12: Determine the test gear of the clutch under test based on the gear ratio of the transmission, wherein the test gear is the gear with the highest torque of the clutch under test.

[0062] In this embodiment, the test gear refers to the specific gear among all available gears that enables the clutch under test to transmit the maximum torque. For example, the purpose of selecting the test gear is to evaluate the torque transmission capability and performance characteristics of the clutch under test under complex operating conditions during clutch testing.

[0063] Determining the test gear of the clutch under test based on the gear ratio can be understood as calculating the torque transmitted from the clutch under test to the output shaft of the transmission in each gear based on the gear ratio, and determining the gear that maximizes the torque transmitted by the clutch under test as the test gear.

[0064] In this embodiment, determining the test gear of the clutch under test based on the gear ratio of the transmission helps ensure the accuracy and representativeness of the test data, and avoids the situation where the data obtained from testing at a gear with low torque is insufficient to reflect the true performance of the clutch.

[0065] Step S14: In the test gear, determine the output speed of the transmission based on the input speed, the preset speed difference, and the transmission gear ratio.

[0066] In this embodiment of the application, the output speed of the transmission refers to the rotational speed of the transmission output shaft under a specific test gear.

[0067] In the test gear, determining the transmission output speed based on the input speed, preset speed difference, and transmission gear ratio can be understood as calculating the transmission output speed based on the transmission's input speed, preset speed difference, and transmission gear ratio in the test gear. For example, the transmission output speed can be represented as S4, without limitation.

[0068] In this embodiment, by precisely setting the input speed, preset the speed difference, and calculating the output speed using the gear ratio of the transmission, the test equipment can simulate the working state of the transmission when shifting gears or under high torque conditions in a real vehicle, thereby helping to realistically evaluate the performance of the clutch.

[0069] Step S16: Based on the input speed, output speed and any pressure value, perform a pressure test on the clutch under test to obtain the target input motor torque.

[0070] In the embodiments of this application, any pressure value refers to the specific pressure value applied to the clutch under test during the test process.

[0071] The target input motor torque can be understood as the magnitude of the input motor torque of the transmission when the input speed of the transmission is S1 and the output speed is S4, under any given pressure value.

[0072] The clutch under test is pressurized based on the input speed, output speed, and any pressure value to obtain the target input motor torque. This can be understood as, under specific operating conditions, by controlling the pressure of the clutch under test, testing and determining the magnitude of the input motor torque that the transmission can stably and effectively transmit.

[0073] In this embodiment of the application, under preset working conditions, by testing the clutch under test under a series of pressure values, the direct relationship between clutch pressure and input motor torque can be obtained, and the torque transmission performance of the clutch under test can be further determined.

[0074] Step S18: Determine the target torque of the clutch under test at any pressure value based on the gear ratio of the transmission and the target input motor torque.

[0075] In this embodiment, the target torque refers to the torque value that the clutch under test should be able to transmit under specific test conditions. The target torque reflects the effective torque that the clutch needs to bear and transmit under a given pressure value.

[0076] Determining the target torque of the clutch under test at any pressure value, based on the gear ratios of the transmission and the target input motor torque, can be understood as calculating and determining the magnitude of the torque that the clutch should be able to effectively transmit to the transmission output shaft under a specific pressure, under specific test conditions. The target torque is determined based on the gear ratios of the internal gears of the transmission and the target input motor torque, reflecting the clutch's expected torque transmission capability under that pressure.

[0077] In this embodiment, by determining the target torque of the clutch under test at any pressure value based on the gear ratio of the transmission and the target input motor torque, the torque transmission capability of the clutch under test can be quantified, the control strategy can be optimized, and the efficient and stable operation of the transmission and clutch system can be ensured.

[0078] In this embodiment, the technical solution first obtains the transmission gear ratio, the transmission input speed, and a preset speed difference, where the preset speed difference reflects the speed difference between the driving and driven ends of the clutch under test. Next, the test gear of the clutch under test is determined based on the transmission gear ratio, wherein the test gear is the gear with the highest torque. Then, at the test gear, the transmission output speed is determined based on the input speed, the preset speed difference, and the transmission gear ratio. Next, a pressure test is performed on the clutch under test based on the input and output speeds and any pressure value to obtain the target input motor torque. Finally, the target torque of the clutch under test at any pressure value is determined based on the transmission gear ratio and the target input motor torque. This overall technical solution achieves the goal of accurately measuring and controlling the torque transmission capability of an automatic transmission clutch, thereby realizing the technical effect of evaluating and optimizing the clutch's torque transmission capability under near-real vehicle operating conditions, and thus solving the technical problem of inaccurate clutch torque transmission capability testing in related technologies.

[0079] Optionally, in step S12, determining the test gear of the clutch under test based on the gear ratio of the transmission includes the following steps:

[0080] Step S121: Based on the gear ratio of the transmission, determine multiple initial torques of the clutch under test in each gear.

[0081] Step S122: Determine the maximum initial torque based on multiple initial torques;

[0082] Step S123: Determine the test gear based on the gear corresponding to the maximum initial torque.

[0083] In this embodiment of the application, the initial torque can be understood as the torque transmitted by the clutch under test in the current gear.

[0084] Determining the initial torque of the clutch under test in each gear based on the gear ratio of the transmission can be understood as calculating the initial torque value that the clutch under test needs to transmit under various operating conditions according to the gear ratio of the transmission in each gear.

[0085] Determining the maximum initial torque based on multiple initial torques can be understood as identifying the largest initial torque among several initial torque values ​​obtained from the clutch under test in various gears. The maximum initial torque represents the maximum torque that the clutch needs to transmit across all test gears.

[0086] Determining the test gear based on the gear corresponding to the maximum initial torque can be understood as selecting that gear as the test gear for the clutch under test after identifying the maximum initial torque and its corresponding gear. The selection of the test gear is based on the maximum torque transmission requirement, meaning that the test conducted in that gear can fully demonstrate the performance limits of the clutch under test.

[0087] Figure 2 This is a flowchart of a gear selection method according to one embodiment of this application, such as... Figure 2 As shown, the torque transmitted by the clutch under test in each gear is first calculated based on the gear ratio of the transmission, and then the gear corresponding to the maximum torque is used as the test gear.

[0088] In this embodiment, firstly, the initial torque of the clutch under test in each gear is calculated based on the gear ratio of the transmission. Then, the maximum value of the initial torque is identified, and the gear corresponding to the maximum initial torque is selected as the test gear. This ensures that the torque borne by the clutch under test is close to its limit, thereby efficiently and accurately evaluating the performance of the clutch under test.

[0089] Optionally, in step S14, the output speed of the transmission is determined based on the input speed, the preset speed difference, and the transmission gear ratio, including the following execution steps:

[0090] Step S141: Determine the driving end speed of the clutch under test based on the input speed and the gear ratio of the transmission;

[0091] Step S142: Determine the driven end speed of the clutch under test based on the driving end speed and the preset speed difference;

[0092] Step S143: Determine the output speed based on the driven end speed and the gear ratio of the transmission.

[0093] In this embodiment, determining the driving end speed of the clutch under test based on the input speed and the gear ratio of the transmission can be understood as calculating the speed of the driving end (i.e., the side directly connected to the input end) of the clutch under test based on the transmission input speed S1 set during the test and the gear ratio of the internal gears of the transmission in the test gear. For example, the driving end speed of the clutch under test can be expressed as S2, which is not limited here.

[0094] Determining the driven end speed of the clutch under test based on the driving end speed and the preset speed difference can be understood as follows: after obtaining the driving end speed of the clutch under test, the speed of the driven end (i.e., the side connected to the output end) can be further calculated using the set speed difference (i.e., the relative speed difference between the driving end and the driven end of the clutch). For example, the driven end speed of the clutch under test can be expressed as S3, which is not limited here.

[0095] Determining the output speed based on the driven end speed and the gear ratio of the transmission can be understood as converting the driven end speed S3 of the clutch under test into the output end speed S4 of the transmission through the gear ratio of the transmission.

[0096] Figure 3 This is a flowchart of a clutch speed difference determination method according to one embodiment of this application, as follows: Figure 3 As shown, first, the test gear of the clutch under test is selected. Then, the input speed of the transmission is set to S1, and the driving speed S2 of the clutch under test is calculated based on the transmission gear ratio and the input speed S1. Next, the speed difference of the clutch under test is set to Δs. Based on the difference between the driving speed S2 and the speed difference Δs, the driven speed S3 of the clutch under test is determined, i.e., S3 = S2 - Δs. Finally, the output speed of the transmission is calculated as S4 based on the transmission gear ratio and the driven speed S3. By setting the transmission input speed to S1 and the transmission output speed to S4, a speed difference of Δs can be created at the clutch under test. For example, the transmission input speed can be selected as 1000 r / min, 2000 r / min, or 3000 r / min, and the speed difference of the clutch under test is 5 r / min, which is not limited here.

[0097] In this embodiment, based on the input speed of the transmission, the gear ratio of the transmission, and the preset speed difference, the speeds of the driving end and driven end of the clutch under test and the output speed of the transmission are determined sequentially, thereby achieving an accurate evaluation of the performance of the clutch under test and laying the foundation for optimizing torque control strategies and improving system reliability.

[0098] Optionally, in step S16, a pressure test is performed on the clutch under test based on the input speed, output speed, and any pressure value to obtain the target input motor torque, including the following execution steps:

[0099] Step S161: Determine multiple pressure values ​​to be tested based on testing requirements;

[0100] Step S162: Based on the input speed, output speed, and multiple pressure values ​​to be tested, the clutch to be tested is pressurized in sequence according to a preset order to obtain the target input motor torque corresponding to any pressure value.

[0101] In this embodiment of the application, the test requirement refers to testing the torque transmission performance of the clutch under test under different pressures.

[0102] The preset sequence refers to the sequence of pressure values ​​to be adjusted when pressurizing the clutch under test. In actual testing, the preset sequence can start from the clutch's minimum working pressure and gradually increase to the maximum working pressure, or a specific stepped pressure increase can be used; there are no restrictions here.

[0103] Determining multiple pressure values ​​based on testing requirements can be understood as pre-selecting a series of pressure values ​​according to the goals and scope of the performance test of the clutch under test. These pressure values ​​cover a variety of pressure scenarios that the clutch under test may encounter during normal operation, ensuring that the test can comprehensively evaluate the torque transmission capability and stability of the clutch under test under different pressure conditions.

[0104] Based on the input speed, output speed, and multiple pressure values ​​to be tested, the clutch under test is pressurized in sequence according to a preset order to obtain the target input motor torque corresponding to any pressure value. This can be understood as, based on the set test conditions, by gradually adjusting the pressure of the clutch on the test equipment, observing and recording the input motor torque when the clutch under test can stably transmit torque under different pressure values.

[0105] Figure 4 This is a simplified structural diagram of a test device according to one embodiment of this application, such as... Figure 4 As shown, the test equipment includes an input motor, an output motor, a transmission, a transmission bracket, and a drive shaft. The input motor provides power and simulates the output characteristics of an engine; its speed and torque can be adjusted via an external controller. During testing, the input motor's speed is set to simulate the transmission's input conditions under different driving conditions, while torque adjustment is used to test the clutch's performance under different loads. The output motor, located at the transmission's output end, absorbs or provides power to simulate the vehicle's load or thrust during driving. By controlling the output motor's speed and torque, the actual operating state of the vehicle at different gears and speeds can be simulated, which is crucial for evaluating the transmission's output performance and the clutch's torque transmission capability. The transmission, as a core component, functions to change the input motor's speed and torque to adapt to different driving needs. During testing, the transmission needs to be adjusted according to different gears and operating conditions to accurately evaluate the clutch's torque transmission characteristics. The gear ratios within the transmission determine the relationship between the input and output speeds, directly affecting torque transmission efficiency. The transmission bracket is used to fix the transmission, ensuring its stable mounting on the test bench during testing and preventing vibration or movement from affecting the accuracy of the test results. The drive shaft connects the input motor and the gearbox, as well as the gearbox and the output motor, and serves to transmit torque. During testing, the drive shaft ensured the continuity and accuracy of power transmission from the input to the output.

[0106] In this embodiment, by controlling the input and output speeds of the transmission, various operating conditions in actual vehicle operation are simulated, thereby obtaining the torque threshold for stable operation of the clutch under test under different pressures, verifying the torque transmission performance of the clutch under test under different pressure values, and ensuring the reliability and stability of the clutch under test under various driving conditions.

[0107] Optionally, before performing a pressure test on the clutch under test based on the input speed, output speed, and any pressure value to obtain the target input motor torque, the method further includes the following execution steps:

[0108] The test gear position controls the vehicle to a preset operating condition;

[0109] The first input motor torque is determined based on preset operating conditions, input speed, and output speed;

[0110] A preliminary test is conducted on the clutch under test based on the initial pressure value to obtain the second input motor torque, wherein the second input motor torque is greater than the first input motor torque;

[0111] The working state of the clutch under test is determined based on the first input motor torque and the second input motor torque.

[0112] In this embodiment of the application, the preset operating condition refers to the vehicle operating state or test environment conditions that are set in advance for testing the performance of the clutch, including specific gear selection, combination of input speed and output speed, and load conditions, which are not limited here.

[0113] The first input motor torque is the torque reading of the input motor measured when no pressure is applied to the clutch under test, i.e., when the clutch under test is not engaged. For example, the first input motor torque can be expressed as T0.

[0114] The initial pressure value is the pressure applied as the first step when starting to test the clutch. The initial pressure value can be a value close to but not exceeding the clutch's partial engagement point, to preliminarily determine the initial engagement state of the clutch. For example, the initial pressure value can be represented as Pkp.

[0115] The second input motor torque is the reading measured at the initial pressure value when the clutch begins to engage and stabilizes. Since clutch engagement increases the load on the input motor, the second input motor torque is typically higher than the first input motor torque. For example, when the clutch under test begins to engage and reaches a steady state, the input motor torque may increase from the previous T0 to Tkp, where Tkp is approximately 10 Nm (Newton-meters) higher than T0; this is not a limitation.

[0116] The concept of controlling the vehicle to operate under preset conditions based on the test gear can be understood as selecting and setting the transmission to a predefined gear according to the performance requirements of the specific clutch to be tested. Then, by controlling the input and output speeds, as well as possible load conditions, the entire test system is ensured to simulate specific operating conditions similar to those of the actual vehicle, thereby evaluating the performance of the clutch under test under conditions closest to actual use scenarios.

[0117] Based on preset operating conditions, input speed, and output speed, the first input motor torque can be understood as the input motor torque recorded when the vehicle is in the preset operating conditions and the clutch under test is in a free state without pressure. This first input motor torque is used to reflect the basic power consumption of the test system when the clutch under test does not transmit any torque. That is, the torque that the input motor needs to overcome for non-clutch factors such as friction and air resistance when the clutch is not in operation.

[0118] The initial test of the clutch under test based on the initial pressure value, and the resulting second input motor torque, can be understood as a preliminary engagement test of the clutch under test based on the selected initial pressure value, to observe the power transmission effect of the clutch under test in the initial engagement state. When the clutch under test begins to engage and torque is transmitted, the input motor torque value recorded by the system is the second input motor torque, which reflects the torque consumed by the input motor to overcome the additional friction force during clutch engagement.

[0119] Determining the operating state of the clutch under test based on the first and second input motor torques can be understood as analyzing the clutch's operating state under the initial pressure value by comparing the first and second input motor torques. If the second input motor torque is higher than the first input motor torque, it indicates that the clutch can effectively engage and transmit torque under that pressure value.

[0120] In this embodiment of the application, by comparing the torque readings of the input motor under different conditions, not only can the engagement efficiency of the clutch under test be evaluated, but also the torque transmission capability of the clutch under test under specific pressure can be analyzed, providing a basis for subsequent performance testing of the clutch under test.

[0121] Figure 5 This is a flowchart of a torque transmission capability testing method according to one embodiment of this application, such as... Figure 5 As shown, firstly, it is necessary to ensure that the transmission is in a free state, with no parking brake or locking mechanism acting on it, in order to perform subsequent speed and torque control. Based on the test gear of the clutch under test, the direction of rotation of the test equipment's motors is adjusted to ensure that the operating direction of the input and output motors matches the test gear, simulating the power transmission direction of the transmission under the test gear condition. Both the input and output motor control modes of the test equipment are set to speed control mode to precisely control the motor speed during the test. The input motor speed is set to idle speed (e.g., 700 r / min), while the output motor speed is calculated and matched according to the gear ratio of the gear under test to ensure a stable power transmission chain is formed within the transmission, and the speed difference between the two ends of the clutch can be precisely controlled.

[0122] Next, in the gear under test, all clutches except the clutch under test are engaged to ensure the uniqueness of the power transmission path and the accuracy of the test. Simultaneously, the lock-up clutch is also engaged to simulate the power lock-up situation when the vehicle is in motion. With the input motor speed S1 and output motor speed S4 set, the input motor torque is allowed to stabilize. The recorded torque value at this point is the drag torque T0 under this condition, reflecting the basic torque consumption of the transmission in the clutch-free state. Then, a pressure test is performed on the clutch under test. Pressure is gradually increased until the input motor torque rises from T0 to a preset torque value Tkp (e.g., T0 + 10 Nm). The clutch pressure at this point is recorded as Pkp, which is the pressure value at the clutch half-engagement point. Afterwards, a step pressure test is performed at different preset pressures (e.g., 2.5 bar and 3.5 bar, without limitation), and the ability of the clutch under test to stably transmit torque at each pressure value is recorded. The test process includes repeated pressurization and depressurization steps at multiple preset pressure points until all preset pressure tests are completed. In each test cycle, the clutch under test needs to be allowed to cool down sufficiently to ensure that the accuracy of the test is not affected by temperature changes.

[0123] Finally, after all preset pressure tests are completed, the input motor speed is set to idle speed, the output motor speed is calculated and matched to idle speed according to the gear ratio under test, and the pressure of all clutches except the clutch under test and the transmission lock-up clutch in the gear under test is released. The output motor speed is set to 0, and the input motor speed is set to 0. At this point, the torque transmission capability test of all clutches is complete.

[0124] Optionally, in step S18, the target torque of the clutch under test at any pressure value is determined based on the gear ratio of the transmission and the target input motor torque, including the following execution steps:

[0125] Step S181: Determine the torque distribution ratio of the test gear based on the gear ratio of the transmission;

[0126] Step S182: Based on the torque distribution ratio and the target input motor torque, determine the target torque of the clutch under test at any pressure value.

[0127] In this embodiment, the torque distribution ratio refers to the proportional relationship in which the input torque is distributed to each clutch according to the gear ratio of the internal gears and the clutch configuration in a specific gear position of the transmission.

[0128] Determining the torque distribution ratio of the test gear based on the gear ratio of the transmission can be understood as follows: before calculating the torque transmission capacity of the clutch under test, it is necessary to determine the torque distribution relationship between each clutch in the test gear according to the gear ratio of the internal gears of the transmission.

[0129] Determining the target torque of the clutch under test at any pressure value, based on the torque distribution ratio and the target input motor torque, can be understood as calculating the target torque value that the clutch under test should transmit at any set pressure value, based on the torque distribution ratio between the clutches and the target input motor torque. For example, if the target input motor torque is set to 200 Nm, and the torque distribution ratio of the clutch under test is 50% in the test gear, then the target torque of the clutch under test is 100 Nm.

[0130] Figure 6 This is a flowchart of a torque calculation method according to one embodiment of this application, such as... Figure 6 As shown, firstly, ensure the clutch under test is in a stable operating state, meaning it is engaged and steadily transmitting torque at a given speed difference. Based on the gear ratios of the transmission in the selected test gear, calculate the torque distribution ratio between the clutches. Measure the target input motor torque T1 at the transmission input end. Based on the torque distribution ratio and the target input motor torque T1, calculate the target torque T2 transmitted by the clutch under test under a specific pressure.

[0131] In this embodiment, by determining the target torque of the clutch under test at any pressure value based on the torque distribution ratio and the target input motor torque, it is possible to ensure that the transmission can efficiently and accurately transmit power while reducing energy consumption.

[0132] Optionally, the clutch torque detection method further includes: determining the pressure-torque correspondence curve of the clutch under test based on any pressure value and the target torque corresponding to any pressure value.

[0133] In this embodiment, the pressure-torque curve is a graphical representation of the torque that the clutch under test can transmit at different pressure values. The pressure-torque curve illustrates the relationship between pressure and torque transmission capability, helping to identify key performance indicators such as the clutch's engagement point and maximum torque transmission point.

[0134] Determining the pressure-torque relationship curve of the clutch under test based on any pressure value and the target torque corresponding to any pressure value can be understood as follows: first, based on each set pressure value, measure and record the actual torque value transmitted by the clutch under test; then, plot the pressure-torque relationship curve of the clutch under test with pressure as the horizontal axis and torque as the vertical axis.

[0135] In this embodiment, the clutch under test is tested under a series of known pressure values. The torque value stably transmitted by the clutch under test under each pressure value is measured and recorded to obtain the pressure-torque correspondence curve. This not only provides direct data for the performance analysis of the clutch under test, but also provides an important basis for optimizing the transmission control strategy and improving vehicle performance.

[0136] Figure 7 This is a flowchart of a clutch torque control method according to one embodiment of this application, such as... Figure 7 As shown, the process includes the following steps:

[0137] Step S70: Obtain the requested torque and the torque distribution ratio of the current gear;

[0138] Step S72: Determine the target requested torque of the clutch based on the requested torque and torque distribution ratio;

[0139] Step S74: Based on the target requested torque and the pressure-torque correspondence curve, determine the target pressure value corresponding to the clutch, wherein the pressure-torque correspondence curve is determined based on the clutch torque control method in any of the above items;

[0140] Step S76: Based on the gear adjustment requirements, control the clutch pressure value to maintain at the target pressure value.

[0141] In this embodiment, the requested torque is a torque value requested by the transmission to be transmitted to the drive wheels based on vehicle driving needs or the control system. For example, the requested torque can be represented as Tr.

[0142] The target requested torque is the torque that the clutch needs to transmit, calculated based on the requested torque.

[0143] The target pressure value is the specific pressure that the clutch solenoid valve or hydraulic system needs to apply in order for the clutch to stably transmit the target requested torque.

[0144] Gear shifting requirements refer to the need for the transmission to perform gear changes during vehicle operation to adapt to different driving conditions (such as changes in vehicle speed and load). Gear shifting requirements are based on the vehicle's real-time driving status and the driver's operating commands, such as shifting from D to R, or from 1st to 2nd gear, and are not limited here.

[0145] Obtaining the requested torque and the torque distribution ratio of the current gear can be understood as the control system acquiring the requested torque from the driver or vehicle sensors, and at the same time, determining the torque distribution ratio of each clutch in the current gear.

[0146] Determining the target requested torque of a clutch based on the requested torque and torque distribution ratio can be understood as calculating the target requested torque of the clutch to be adjusted based on the torque distribution ratio of the current gear and the overall requested torque.

[0147] Determining the target pressure value corresponding to the clutch based on the target requested torque and the pressure-torque correspondence curve can be understood as, based on the target requested torque, the system refers to the clutch pressure-torque correspondence curve to determine the target pressure value that the clutch solenoid valve or hydraulic system needs to apply in order to achieve the target requested torque.

[0148] Based on gear adjustment requirements, maintaining the clutch pressure value at the target pressure value can be understood as the control system precisely adjusting and maintaining the clutch pressure value at the target pressure value determined in step S74 according to gear adjustment requirements (such as clutch pressure control during gear shifting) to ensure that the clutch can stably and efficiently transmit torque and meet the needs of vehicle driving.

[0149] In this embodiment, the target pressure value corresponding to the clutch is determined based on the requested torque and pressure-torque correspondence curve, ensuring that the automatic transmission can control the clutch pressure according to the requested torque and gear requirements under various operating conditions, so as to provide stable and efficient power transmission, while optimizing fuel economy and driving experience.

[0150] In step S76, maintaining the clutch pressure at the target pressure value includes the following steps:

[0151] Step S761, in response to the input motor torque of the transmission being less than the requested torque, the clutch pressure is increased by a first value; or,

[0152] In step S762, in response to the input motor torque being greater than the requested torque, the clutch pressure is reduced by a first value.

[0153] In this embodiment of the application, the increase of the clutch pressure by a first value in response to the input motor torque of the transmission being less than the requested torque can be understood as follows: when the vehicle shifting process ends and the lock-up clutch is locked, the input motor torque of the transmission is detected. If the input motor torque is less than the requested torque, the clutch pressure will be increased by a first value Δp1 so that the clutch pressure is maintained at the target pressure value.

[0154] In response to the input motor torque being greater than the requested torque, the clutch pressure decreases by a first value. This can be understood as follows: if the input motor torque is greater than the requested torque, the clutch pressure will decrease by a first value Δp1 in order to maintain the clutch pressure at the target pressure value.

[0155] In this embodiment, a closed-loop control mechanism is used to monitor and adjust the clutch pressure in real time to ensure that the input motor torque matches the requested torque. This not only improves the efficiency and accuracy of power transmission, but also enhances the vehicle's adaptability and safety under different driving conditions.

[0156] The clutch torque control method also includes the following execution steps:

[0157] Obtain the target vehicle's speed and engine speed;

[0158] The predicted engine speed at the first moment is determined based on the rate of change of engine speed.

[0159] Based on vehicle speed and current gear, determine the engine speed matching value at the first moment;

[0160] In response to the prediction that the difference between the predicted speed value and the matched speed value is greater than a preset threshold at a second moment, the clutch pressure increases by a second value, wherein the second moment is later than the first moment.

[0161] In this embodiment of the application, the first moment can refer to the current moment.

[0162] The second moment can refer to a moment after the current moment.

[0163] Obtaining the target vehicle's speed and engine speed can be understood as obtaining the target vehicle's speed based on the vehicle speed sensor and obtaining the engine speed based on the engine speed sensor.

[0164] Determining the engine speed prediction value at the first moment based on the rate of change of engine speed can be understood as predicting the engine speed at the current moment based on the current rate of change of engine speed by analyzing the engine speed time series.

[0165] Determining the engine speed matching value at the first moment based on vehicle speed and current gear can be understood as determining the desired engine speed value at the current moment based on the current vehicle speed and transmission gear status.

[0166] In response to the prediction that the difference between the predicted engine speed and the matched engine speed is greater than a preset threshold at a second moment, the clutch pressure is increased by the second value. This can be understood as follows: when the control system predicts that the difference between the predicted engine speed and the desired engine speed at a second moment is greater than a preset threshold (e.g., 5 r / min), the system will control the clutch pressure to increase by the second value (e.g., Δp2) to ensure the stability and safety of the power system.

[0167] In this embodiment of the application, by determining the relationship between the predicted engine speed and the matched engine speed at a certain moment, the driving performance and fuel economy of the vehicle can be effectively improved, while also increasing driving safety and avoiding potential power system malfunctions.

[0168] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0169] This embodiment also provides a clutch torque detection device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0170] Figure 8 This is a structural block diagram of a clutch torque detection device according to one embodiment of this application, such as... Figure 8 As shown, a clutch torque detection device 800 is used as an example. This device includes: a first acquisition module 801, used to acquire the gear ratio of the transmission, the input speed of the transmission, and a preset speed difference, wherein the preset speed difference reflects the speed difference between the driving and driven ends of the clutch under test. A first determination module 802, used to determine the test gear of the clutch under test based on the gear ratio of the transmission, wherein the test gear is the gear with the highest torque of the clutch under test. A second determination module 803, used to determine the output speed of the transmission based on the input speed, the preset speed difference, and the gear ratio of the transmission at the test gear. A testing module 804, used to perform a pressure test on the clutch under test based on the input speed, the output speed, and any pressure value to obtain the target input motor torque. A third determination module 805, used to determine the target torque of the clutch under test at any pressure value based on the gear ratio of the transmission and the target input motor torque.

[0171] Optionally, the first determining module 802 is further configured to determine multiple initial torques of the clutch under test in each gear based on the gear ratio of the transmission; determine the maximum initial torque based on the multiple initial torques; and determine the test gear based on the gear corresponding to the maximum initial torque.

[0172] Optionally, the second determining module 803 is further configured to determine the driving end speed of the clutch under test based on the input speed and the gear ratio of the transmission; determine the driven end speed of the clutch under test based on the driving end speed and the preset speed difference; and determine the output speed based on the driven end speed and the gear ratio of the transmission.

[0173] Optionally, the test module 804 is also used to determine multiple pressure values ​​to be tested based on test requirements; based on the input speed, output speed and multiple pressure values ​​to be tested, the clutch to be tested is pressurized in sequence according to a preset order to obtain the target input motor torque corresponding to any pressure value.

[0174] Optionally, the test module 804 is also used to control the vehicle in a preset operating condition based on the test gear; determine the first input motor torque based on the preset operating condition, input speed and output speed; perform a preliminary test on the clutch under test based on the initial pressure value to obtain the second input motor torque, wherein the second input motor torque is greater than the first input motor torque; and determine the working state of the clutch under test based on the first input motor torque and the second input motor torque.

[0175] Optionally, the third determining module 805 is also used to determine the torque distribution ratio of the test gear based on the gear ratio of the transmission; and to determine the target torque of the clutch under test at any pressure value based on the torque distribution ratio and the target input motor torque.

[0176] Optionally, the third determining module 805 is also used to determine the pressure-torque correspondence curve of the clutch under test based on any pressure value and the target torque corresponding to any pressure value.

[0177] Figure 9 This is a structural block diagram of a clutch torque control device according to one embodiment of this application, such as... Figure 9 As shown, taking a clutch torque control device 900 as an example, the device includes: a second acquisition module 901, used to acquire the requested torque and the torque distribution ratio of the current gear; a fourth determination module 902, used to determine the target requested torque of the clutch based on the requested torque and the torque distribution ratio; a fifth determination module 903, used to determine the target pressure value corresponding to the clutch based on the target requested torque and a pressure-torque correspondence curve, wherein the pressure-torque correspondence curve is determined based on the clutch torque detection method described in any of the above-mentioned modules; and a control module 904, used to control the clutch pressure value to maintain it at the target pressure value based on gear adjustment requirements.

[0178] Optionally, the control module 904 is further configured to increase the clutch pressure by a first value in response to the input motor torque of the transmission being less than the requested torque; or to decrease the clutch pressure by a first value in response to the input motor torque being greater than the requested torque.

[0179] Optionally, the control module 904 is also used to acquire the vehicle speed and engine speed of the target vehicle; determine the predicted engine speed value at the first moment based on the rate of change of engine speed; determine the engine speed matching value at the first moment based on the vehicle speed and the current gear; and increase the clutch pressure by a second value in response to the prediction that the difference between the predicted speed value and the speed matching value is greater than a preset threshold at the second moment, wherein the second moment is later than the first moment.

[0180] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0181] Embodiments of this application also provide a computer-readable storage medium storing a computer program, wherein the computer program is configured to execute the steps of any of the embodiments of the clutch torque detection method described above when run on a computer or processor.

[0182] Optionally, in this embodiment, the computer-readable storage medium may be configured to store a computer program for performing the following steps:

[0183] Step S10: Obtain the gear ratio of the transmission, the input speed of the transmission, and the preset speed difference, wherein the preset speed difference is used to reflect the speed difference between the driving end and the driven end of the clutch under test;

[0184] Step S12: Determine the test gear of the clutch under test according to the gear ratio of the transmission, wherein the test gear is the gear with the highest torque of the clutch under test;

[0185] Step S14: In the test gear, determine the output speed of the transmission based on the input speed, the preset speed difference, and the transmission gear ratio;

[0186] Step S16: Based on the input speed, output speed and any pressure value, perform a pressure test on the clutch under test to obtain the target input motor torque;

[0187] Step S18: Determine the target torque of the clutch under test at any pressure value based on the gear ratio of the transmission and the target input motor torque.

[0188] Optionally, in this embodiment, the computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0189] Embodiments of this application also provide an electronic device, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the embodiments of the clutch torque detection method described above.

[0190] Optionally, in this embodiment, the processor in the above-described electronic device may be configured to run a computer program to perform the following steps:

[0191] Step S10: Obtain the gear ratio of the transmission, the input speed of the transmission, and the preset speed difference, wherein the preset speed difference is used to reflect the speed difference between the driving end and the driven end of the clutch under test;

[0192] Step S12: Determine the test gear of the clutch under test according to the gear ratio of the transmission, wherein the test gear is the gear with the highest torque of the clutch under test;

[0193] Step S14: In the test gear, determine the output speed of the transmission based on the input speed, the preset speed difference, and the transmission gear ratio;

[0194] Step S16: Based on the input speed, output speed and any pressure value, perform a pressure test on the clutch under test to obtain the target input motor torque;

[0195] Step S18: Determine the target torque of the clutch under test at any pressure value based on the gear ratio of the transmission and the target input motor torque.

[0196] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the embodiments of the above-described clutch torque detection method.

[0197] Optionally, in this embodiment, the computer program in the above-described computer program product can be configured to perform the following steps when executed by a processor:

[0198] Step S10: Obtain the gear ratio of the transmission, the input speed of the transmission, and the preset speed difference, wherein the preset speed difference is used to reflect the speed difference between the driving end and the driven end of the clutch under test;

[0199] Step S12: Determine the test gear of the clutch under test according to the gear ratio of the transmission, wherein the test gear is the gear with the highest torque of the clutch under test;

[0200] Step S14: In the test gear, determine the output speed of the transmission based on the input speed, the preset speed difference, and the transmission gear ratio;

[0201] Step S16: Based on the input speed, output speed and any pressure value, perform a pressure test on the clutch under test to obtain the target input motor torque;

[0202] Step S18: Determine the target torque of the clutch under test at any pressure value based on the gear ratio of the transmission and the target input motor torque.

[0203] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0204] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0205] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0206] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0207] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0208] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0209] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0210] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for detecting clutch torque, characterized in that, include: The gear ratio of the transmission, the input speed of the transmission, and the preset speed difference are obtained, wherein the preset speed difference is used to reflect the speed difference between the driving end and the driven end of the clutch under test; Based on the gear ratios of the transmission, multiple initial torques of the clutch under test in each gear are determined; based on the multiple initial torques, the maximum initial torque is determined; based on the gear corresponding to the maximum initial torque, the test gear is determined. In the test gear, the driving end speed of the clutch under test is determined based on the input speed and the gear ratio of the transmission; the driven end speed of the clutch under test is determined based on the driving end speed and the preset speed difference; and the output speed of the transmission is determined based on the driven end speed and the gear ratio of the transmission. Based on the input speed, the output speed, and any pressure value, a pressure test is performed on the clutch under test to obtain the target input motor torque; The torque distribution ratio of the test gear is determined based on the gear ratio of the transmission; the target torque of the clutch under test is determined based on the torque distribution ratio and the target input motor torque at any pressure value.

2. The method according to claim 1, characterized in that, The step of pressurizing the clutch under test based on the input speed, the output speed, and any pressure value to obtain the target input motor torque includes: Multiple pressure values ​​to be tested were determined based on testing requirements; Based on the input speed, the output speed, and the multiple pressure values ​​to be tested, the clutch to be tested is pressurized in a preset order to obtain the target input motor torque corresponding to any pressure value.

3. The method according to claim 1, characterized in that, Before performing a pressure test on the clutch under test based on the input speed, the output speed, and any pressure value to obtain the target input motor torque, the method further includes: Based on the test gear position, the vehicle is controlled to be in a preset operating condition; The first input motor torque is determined based on the preset operating conditions, the input speed, and the output speed. A preliminary test is performed on the clutch under test based on the initial pressure value to obtain the second input motor torque, wherein the second input motor torque is greater than the first input motor torque; The working state of the clutch under test is determined based on the first input motor torque and the second input motor torque.

4. The method according to claim 1, characterized in that, The method further includes: Based on any pressure value and the target torque corresponding to that pressure value, the pressure-torque relationship curve of the clutch under test is determined.

5. A clutch torque control method, characterized in that, include: Get the requested torque and the torque distribution ratio of the current gear; Based on the requested torque and the torque distribution ratio, the target requested torque of the clutch is determined; Based on the target requested torque and the pressure-torque correspondence curve, the target pressure value corresponding to the clutch is determined, wherein the pressure-torque correspondence curve is determined based on the method in claim 4 above; Based on gear adjustment requirements, the pressure value of the clutch is controlled to be maintained at the target pressure value.

6. The method according to claim 5, characterized in that, Maintaining the pressure of the clutch at the target pressure value includes: In response to the input motor torque of the transmission being less than the requested torque, the pressure of the clutch increases by a first value; or, In response to the input motor torque being greater than the requested torque, the pressure of the clutch is reduced by the first value.

7. The method according to claim 5, characterized in that, The method further includes: Obtain the target vehicle's speed and engine speed; The predicted engine speed at the first moment is determined based on the rate of change of the engine speed. Based on the vehicle speed and the current gear, determine the engine speed matching value at the first moment; In response to the prediction that the difference between the predicted speed value and the matched speed value is greater than a preset threshold at a second moment, the pressure of the clutch increases by a second value, wherein the second moment is later than the first moment.

8. A clutch torque detection device, characterized in that, The device includes: The first acquisition module is used to acquire the gear ratio of the transmission, the input speed of the transmission, and the preset speed difference, wherein the preset speed difference is used to reflect the speed difference between the driving end and the driven end of the clutch under test; A first determining module is configured to determine multiple initial torques of the clutch under test in each gear based on the gear ratio of the transmission; determine a maximum initial torque based on the multiple initial torques; and determine a test gear based on the gear corresponding to the maximum initial torque. The second determining module is used to determine the driving end speed of the clutch under test based on the input speed and the gear ratio of the transmission in the test gear position; determine the driven end speed of the clutch under test based on the driving end speed and the preset speed difference; and determine the output speed of the transmission based on the driven end speed and the gear ratio of the transmission. The testing module is used to perform a pressure test on the clutch under test based on the input speed, the output speed, and any pressure value to obtain the target input motor torque; The third determining module is used to determine the torque distribution ratio of the test gear based on the gear ratio of the transmission; and to determine the target torque of the clutch under test under any pressure value based on the torque distribution ratio and the target input motor torque.

9. A clutch torque control device, characterized in that, The device includes: The second acquisition module is used to acquire the requested torque and the torque distribution ratio of the current gear; The fourth determining module is used to determine the target requested torque of the clutch based on the requested torque and the torque distribution ratio; The fifth determining module is used to determine the target pressure value corresponding to the clutch based on the target requested torque and the pressure-torque correspondence curve, wherein the pressure-torque correspondence curve is determined based on the method in claim 4 above; A control module is used to control the pressure value of the clutch to maintain the target pressure value based on the gear adjustment requirements.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the clutch torque detection method according to any one of claims 1 to 4 when run on a computer or processor.

11. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the clutch torque detection method as described in any one of claims 1 to 4.

12. A computer program product, characterized in that, The system includes a computer program that, when executed by a processor, implements the clutch torque detection method as described in any one of claims 1 to 4.

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