Method, device and electronic device for detecting a transfer case

Abstract

The application discloses a kind of transfer detection method, device and electronic device, it is related to vehicle technical field.Therein, the method includes: in response to detection instruction, control the clutch of transfer starts to run-in, and record the run-in frequency of clutch, wherein detection instruction is determined according to working condition;In response to run-in frequency greater than or equal to preset run-in frequency, control clutch transmission torque, and record transmission torque frequency, wherein preset run-in frequency is determined according to detection instruction;In response to transmission torque frequency greater than or equal to preset transmission torque frequency, determine the average torque of clutch, wherein preset transmission torque frequency is determined according to run-in frequency;According to average torque, determine the detection result of transfer.The present application solves the technical problem that the devices in the vehicle transfer including wet clutch controlled by the motor cannot be diagnosed in the related art.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a transfer case detection method, apparatus, and electronic device. Background Technology

[0002] As a gear transmission system, the vehicle's transfer case plays a crucial role in the transmission and distribution of power. When components within the transfer case, such as the internal clutch, worm gear, or actuator motor, fail, it affects the normal operation of the transfer case, thus severely impacting the user experience. Therefore, targeted diagnostics of each component within the transfer case are essential.

[0003] Currently, most vehicle transfer cases are electromagnetically clutch-controlled. When insufficient torque transmission occurs, a vehicle-wide torque-related diagnostic control strategy is used for diagnosis, and the electromagnetic clutch current is adjusted to precisely compensate for the torque transmission capacity. However, this method cannot be applied to vehicle transfer cases that include wet clutches controlled by actuator motors, nor can it provide targeted diagnosis for individual components within such transfer cases.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a transfer case testing method, apparatus, and electronic device to at least solve the technical problem in the related art of being unable to perform targeted diagnosis of various components in a vehicle transfer case, including a wet clutch controlled by an actuator motor.

[0006] According to one embodiment of the present invention, a transfer case detection method is provided, comprising: responding to a detection command, controlling the clutch of the transfer case to begin break-in and recording the number of break-in cycles of the clutch, wherein the detection command is determined according to operating conditions; responding to the number of break-in cycles being greater than or equal to a preset number of break-in cycles, controlling the clutch to transmit torque and recording the number of torque transmission cycles, wherein the preset number of break-in cycles is determined according to the detection command; responding to the number of torque transmission cycles being greater than or equal to the preset number of torque transmission cycles, determining the average torque of the clutch, wherein the preset number of torque transmission cycles is determined according to the number of break-in cycles; and determining the detection result of the transfer case based on the average torque.

[0007] Optionally, before the clutch controlling the transfer case begins to break in, the motor position of the actuator motor controlling the transfer case is set to the zero position.

[0008] Optionally, in response to a detection command, controlling the transfer case's clutch to begin break-in and recording the number of clutch break-in cycles includes: in response to receiving a detection command under a target operating condition, determining the speed of the transfer case's actuator motor, the preset single break-in time of the clutch, the preset number of break-in cycles, the desired torque of the clutch, and the desired motor position of the actuator motor corresponding to the target operating condition, wherein the desired motor position corresponds to the desired torque; controlling the clutch to begin break-in based on the speed and desired motor position; and in response to a single break-in time being greater than or equal to the preset single break-in time, controlling the motor position to be set to zero and updating the number of break-in cycles.

[0009] Optionally, in response to a single break-in time being greater than or equal to a preset single break-in time, after controlling the motor position to be set to zero and updating the break-in count, the method further includes: in response to a break-in count being less than a preset break-in count, controlling the clutch to start break-in and updating the break-in count.

[0010] Optionally, controlling the clutch transmission torque and recording the number of torque transmissions includes: controlling the clutch to start break-in based on the rotational speed and desired motor position, and controlling the clutch transmission torque; in response to a single break-in time being greater than or equal to a preset single break-in time, controlling the motor position to be in the zero position, and updating the number of torque transmissions.

[0011] Optionally, after controlling the motor position to be set to zero and updating the torque transmission count in response to a single break-in time being greater than or equal to a preset single break-in time, the method further includes: controlling the clutch to transmit torque and updating the torque transmission count in response to a torque transmission count being less than a preset torque transmission count.

[0012] Optionally, determining the transfer case detection result based on the average torque includes: determining the difference between the average torque and the desired torque; and outputting a first detection result in response to the difference being within a preset range.

[0013] Optionally, the method further includes: monitoring the motor position, motor current, and output torque of the transfer case's actuator motor; and outputting a second detection result in response to the motor position, motor current, and output torque meeting the failure conditions.

[0014] According to one embodiment of the present invention, a transfer case detection device is also provided, comprising: a break-in module, which controls the clutch of the transfer case to begin break-in in response to a detection command and records the number of break-in cycles of the clutch, wherein the detection command is determined according to operating conditions; a torque transmission module, which controls the clutch to transmit torque in response to the number of break-in cycles being greater than or equal to a preset number of break-in cycles and records the number of torque transmission cycles, wherein the preset number of break-in cycles is determined according to the detection command; a processing module, which determines the average torque of the clutch in response to the number of torque transmission cycles being greater than or equal to the preset number of torque transmission cycles, wherein the preset number of torque transmission cycles is determined based on the number of break-in cycles; and a determination module, which determines the detection result of the transfer case based on the average torque.

[0015] Optionally, the break-in module is also used to control the motor position of the transfer case's actuator motor to be at the zero position of the actuator motor.

[0016] Optionally, the break-in module is also used to, in response to receiving a detection command under the target operating condition, determine the rotational speed of the transfer case's actuator motor, the preset single break-in time of the clutch, the preset number of break-in cycles, the desired torque of the clutch, and the desired motor position of the actuator motor corresponding to the target operating condition, wherein the desired motor position corresponds to the desired torque; control the clutch to start break-in based on the rotational speed and the desired motor position; and, in response to the single break-in time being greater than or equal to the preset single break-in time, control the motor position to be set to the zero position and update the number of break-in cycles.

[0017] Optionally, the break-in module is also used to control the clutch to start break-in and update the break-in count in response to the break-in count being less than the preset break-in count.

[0018] Optionally, the torque transmission module is also used to control the clutch to start break-in based on the rotational speed and desired motor position, and to control the torque transmitted by the clutch; in response to a single break-in time being greater than or equal to a preset single break-in time, the motor position is controlled to be at the zero position, and the number of torque transmissions is updated.

[0019] Optionally, the torque transmission module is also used to control the transmission torque of the clutch and update the torque transmission count in response to the torque transmission count being less than the preset torque transmission count.

[0020] Optionally, the determining module is also used to determine the difference between the average torque and the desired torque; in response to the difference being within a preset range, a first detection result is output.

[0021] Optionally, the determination module is also used to monitor the motor position, motor current, and output torque of the transfer case's actuator motor; and outputs a second detection result in response to the motor position, motor current, and output torque meeting the failure conditions.

[0022] According to one embodiment of the present invention, a vehicle is also provided, which is used to perform the transfer case detection method of any of the above claims.

[0023] According to one embodiment of the present invention, 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 transfer case detection method described above when running on a computer or processor.

[0024] According to one embodiment of the present invention, 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 transfer case detection method described in any of the preceding claims.

[0025] In this embodiment of the invention, the above-described method is used to control the clutch in the transfer case to begin break-in in response to detection commands under different operating conditions, and to record the number of clutch break-in cycles. When the number of break-in cycles is greater than or equal to the number of break-in cycles determined according to the detection command (i.e., the preset number of break-in cycles), the clutch transmission torque is controlled, and the number of torque transmission cycles is recorded. When the number of torque transmission cycles is greater than or equal to the number of torque transmission cycles determined according to the number of break-in cycles (i.e., the preset number of torque transmission cycles), the average torque of the clutch is determined, and finally, the detection result of the transfer case is determined based on the average torque. This enables automated closed-loop detection of the transfer case based on different operating conditions, achieving the goal of targeted diagnosis of various components in a vehicle transfer case, including a wet clutch controlled by an actuator motor. Furthermore, the automated operation reduces the amount of manual operation, shortens the detection time while meeting the accuracy requirements for torque transmission capability, and improves detection efficiency. The system is simple and easy to maintain, thus solving the technical problem in related technologies where targeted diagnosis of various components in a vehicle transfer case, including a wet clutch controlled by an actuator motor, is not possible. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is a flowchart of a transfer case detection method according to one embodiment of the present invention;

[0028] Figure 2 This is a structural diagram of a transfer case according to one embodiment of the present invention;

[0029] Figure 3 This is a system block diagram of a transfer case detection method according to one embodiment of the present invention;

[0030] Figure 4 This is a flowchart of a transfer case detection method according to one embodiment of the present invention;

[0031] Figure 5 This is a structural block diagram of a transfer case detection device according to one embodiment of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention 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 the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises 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.

[0034] According to one embodiment of the present invention, an embodiment of a transfer case 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.

[0035] 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.

[0036] 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.

[0037] The memory can be used to store computer programs, such as the computer program corresponding to the transfer case detection method in this embodiment of the invention. The processor implements the aforementioned transfer case detection method by running the computer program stored in the memory. The memory may include high-speed random access memory (RAM) 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, intranets, local area networks (LANs), mobile communication networks, and combinations thereof.

[0038] 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.

[0039] 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.

[0040] This embodiment provides a transfer case detection method. Figure 1 This is a flowchart of a transfer case detection method according to one embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps:

[0041] Step S10: In response to the detection command, control the transfer case clutch to start break-in and record the number of clutch break-in cycles;

[0042] The testing instructions are determined based on the operating conditions.

[0043] A vehicle transfer case is a gear transmission system used to distribute and transmit the power generated by the transmission in a vehicle to other systems. The transfer case generally includes components such as a clutch, sprocket, and chain. This invention is directed to a vehicle transfer case that includes a wet clutch controlled by an actuator motor.

[0044] Understandably, current technology is designed for testing vehicle transfer cases with internally controlled electromagnetic clutches. These transfer cases do not require extensive clutch break-in before vehicle application; simple internal component conformity checks are sufficient. However, this method is not applicable to vehicle transfer cases including those with wet clutches controlled by actuator motors. When testing transfer cases with wet clutches controlled by actuator motors, the friction coefficient of the new friction plates and steel plates in the clutch is unstable. Direct testing can affect the test results and accuracy. Therefore, the clutch needs to be fully broken in to ensure it is properly broken in before testing, thereby reducing errors and ensuring accurate results.

[0045] Figure 2This is a structural diagram of a transfer case according to one embodiment of the present invention, such as... Figure 2 As shown, the transfer case includes: a rear output shaft 01, a clutch driving end 02, a clutch driven end 03, a driving sprocket 04, an input shaft 05, a chain 06, a driven sprocket 07, a front output shaft 08, and a housing 09. The clutch of the transfer case is controlled by an actuator motor (not shown here). Figure 2 The structural diagram of the transfer case shown is only an example. The transfer case, which includes a wet clutch controlled by an actuator motor and is the subject of this invention, can also have other structures. This invention is not limited in its embodiments.

[0046] A test instruction can be understood as an instruction determined according to different operating conditions for testing various components in the transfer case. For example, a test instruction can be a test instruction for a vehicle climbing a hill, or a test instruction for a vehicle accelerating.

[0047] The test command is used to instruct the transfer case to undergo break-in and torque transmission tests. It is understood that the vehicle's transfer case is a gear transmission system. During operation, the normal operation of the transfer case may be affected by break-in between components or improper torque transmission. By conducting break-in and torque transmission tests on the transfer case, the clutch of the transfer case can be controlled to make corresponding movements, thereby testing the torque transmission capability and actuator function of the transfer case.

[0048] Optionally, a motor speed control unit can be set in the system to control the input speed and output speed, so that the input speed and output speed produce a speed difference, thereby controlling the clutch to start running-in. This embodiment of the invention is not limited.

[0049] It is understandable that torque transmission testing should be performed after the break-in test. During the break-in test, the friction plates and steel plates in the clutch are broken in. After the friction plates and steel plates are in a broken-in state, the torque transmission test of the transfer case is performed. This can avoid the error caused by the clutch not being broken in, thus ensuring the accuracy of the test results.

[0050] Optionally, the system can be configured with a transfer case actuator position control unit and a clutch break-in count control unit. When the transfer case actuator position control unit completes one clutch engagement and disengagement action, the clutch break-in count control unit increments the count by 1, thus recording the number of clutch break-ins.

[0051] Step S11: In response to the break-in number being greater than or equal to the preset break-in number, control the clutch to transmit torque and record the number of torque transmissions;

[0052] The preset number of break-in cycles is determined according to the testing instructions.

[0053] The preset number of break-in cycles is determined based on the test instructions based on different operating conditions. It is understandable that the required number of break-in cycles for the clutch in the vehicle's transfer case varies under different operating conditions. The preset number of break-in cycles is determined based on the test instructions, which can determine the preset number of break-in cycles that meets the actual needs of the operating condition.

[0054] Optionally, the preset number of break-in cycles can be the minimum number of cycles required to ensure that the friction plates and steel plates in the clutch are in a state of complete break-in under the current operating conditions. That is, when the number of break-in cycles is greater than or equal to the preset number of break-in cycles, it indicates that the friction plates and steel plates in the clutch are in a state of complete break-in, and the torque transmission process of the clutch can be detected.

[0055] Optionally, a clutch break-in cycle control unit can be set in the system to determine the preset break-in cycle, but this embodiment of the invention is not limited thereto.

[0056] When the number of break-in cycles is greater than or equal to the preset number of break-in cycles, the clutch meets the basic conditions for torque transmission. At this time, the clutch transmission torque is controlled, and the number of torque transmission cycles is recorded. Optionally, a clutch break-in cycle control unit and a clutch torque transmission cycle control unit can be set in the system. When the clutch break-in cycle control unit completes the preset number of clutch engagement and disengagement actions, the clutch torque transmission cycle control unit increments the count by 1, thus recording the number of clutch torque transmission cycles.

[0057] Step S12: In response to the number of torque transmissions being greater than or equal to the preset number of torque transmissions, determine the average torque of the clutch;

[0058] The preset number of torque transmission cycles is determined based on the number of break-in cycles.

[0059] The preset torque transmission count is determined based on the number of break-in cycles, that is, based on the test instructions determined according to the requirements of different working conditions. It can be understood that the torque transmission count requirements of the clutch in the vehicle transfer case are different under different working conditions. The preset torque transmission count is determined based on the number of break-in cycles, which can determine the preset torque transmission count that meets the actual requirements of the working condition.

[0060] Optionally, the preset torque transmission count can be the minimum number of times that the clutch torque transmission process can be guaranteed to operate normally under the current working conditions. That is, when the torque transmission count is greater than or equal to the preset torque transmission count, it means that the clutch torque transmission process meets the torque transmission requirements of the clutch in the current transfer case.

[0061] Optionally, a clutch torque transmission count control unit can be set in the system to determine the preset torque transmission count. This embodiment of the invention does not limit this.

[0062] When the number of torque transmission cycles is greater than or equal to the preset number of torque transmission cycles, the torque transmission process of the clutch meets the torque transmission requirements of the clutch in the current transfer case, and the average torque of the clutch is determined at this time. Optionally, the average torque of the clutch can be calculated during the torque transmission detection process by setting a post-processing module in the system.

[0063] Optionally, the average torque of the clutch can be determined by programming existing processing software. For example, a torque measurement unit can be set in the system to detect and record the specific transmission torque value in real time, and the interval where the transmission torque value is greater than half of the expected torque of the clutch can be taken as the effective break-in interval, and the average torque of this interval can be calculated.

[0064] Step S13: Determine the test result of the transfer case based on the average torque.

[0065] Average torque can be understood as the ratio of the number of torque transmissions to the time when the number of torque transmissions occurs, when the number of torque transmissions in the clutch of the transfer case is greater than or equal to the preset number of torque transmissions.

[0066] The test result of the transfer case is determined based on the average torque. Optionally, the test result can be determined by judging whether the average torque is within a preset range. It is understood that different transfer cases have different normal torques under different operating conditions, and the preset range can be set to conform to the normal torque range of the current transfer case under the current operating conditions.

[0067] Specifically, it is determined whether the average torque is within the preset range. If the average torque is within the preset range, it means that the current transfer case can operate normally and meet the normal working requirements under the current working conditions, and the test result can be qualified. If the average torque is not within the preset range, it means that the current transfer case cannot operate normally and cannot meet the normal working requirements under the current working conditions, and the test result can be unqualified.

[0068] Optionally, a post-processing module can be set in the system to determine the average torque, and a torque qualification unit can be set to determine the test results.

[0069] Through the above steps, in response to detection commands under different operating conditions, the clutch in the transfer case is controlled to begin break-in, and the number of clutch break-in cycles is recorded. When the number of break-in cycles is greater than or equal to the number of break-in cycles determined according to the detection command (i.e., the preset number of break-in cycles), the clutch transmission torque is controlled, and the number of torque transmission cycles is recorded. When the number of torque transmission cycles is greater than or equal to the number of torque transmission cycles determined according to the break-in cycles (i.e., the preset number of torque transmission cycles), the average torque of the clutch is determined. Finally, the detection result of the transfer case is determined based on the average torque. This enables automated closed-loop detection of the transfer case based on different operating conditions, achieving the goal of targeted diagnosis of various components in a vehicle transfer case, including a wet clutch controlled by an actuator motor. The automated operation reduces manual operation, shortens detection time while meeting torque transmission accuracy requirements, and improves detection efficiency. The system is simple and easy to maintain, thus solving the technical problem in related technologies that cannot perform targeted diagnosis of various components in a vehicle transfer case, including a wet clutch controlled by an actuator motor.

[0070] Optionally, in step S10, before the clutch of the transfer case begins to break in, the following steps may be included:

[0071] In step S100, the motor position of the actuator motor of the transfer case is set to the zero position.

[0072] The transfer case's actuator motor is used to control the transfer case's clutch to begin break-in. Understandably, if the actuator motor's position is not zero or is still in the position of the last run's end state, directly controlling the transfer case's clutch to begin break-in may cause inaccurate recording of break-in times. Therefore, before controlling the transfer case's clutch to begin break-in, the actuator motor's position is set to the zero position to ensure the accuracy of the subsequently recorded break-in times.

[0073] Optionally, the current motor position can be set and adjusted by setting a transfer case actuator motor position control unit in the system until the actuator motor position is at the zero position.

[0074] Optionally, the motor position of the actuator can be determined based on the actuator torque to be at the zero position of the actuator. Specifically, when the actuator torque reaches the torque corresponding to the zero position of the motor, the motor is automatically powered on and off once to perform mechanical position zeroing of the motor, thereby making the actuator motor position at the zero position of the actuator.

[0075] Optionally, the current motor position can be set and adjusted by the transfer case motor position control unit. The adjustment can be made by combining the motor output torque-motor position function curve or the motor current-motor position function curve. This embodiment of the invention does not limit this.

[0076] Therefore, before the clutch controlling the transfer case begins to break in, the motor position of the actuator motor controlling the transfer case is at the zero position of the actuator motor. This ensures that the current detection is based on the original state of the transfer case and avoids errors that may be caused by historical data residue. This, in turn, ensures the accuracy of the subsequent recorded number of break-in cycles and torque transmission cycles.

[0077] Optionally, in step S10, responding to the detection command, controlling the transfer case's clutch to begin break-in and recording the number of clutch break-in cycles may include the following steps:

[0078] Step S101: In response to receiving the detection command under the target working condition, determine the rotational speed of the transfer case's actuator motor, the preset single break-in time of the clutch, the preset number of break-in cycles, the desired torque of the clutch, and the desired motor position of the actuator motor corresponding to the target working condition.

[0079] The desired motor position corresponds to the desired torque.

[0080] The target operating condition can be understood as the current specific operating condition used to determine the test command. By setting different target operating conditions to test the transfer case, it is possible to test the transfer case under different operating conditions.

[0081] The rotational speed of the actuator motor can be understood as the speed at which the actuator motor rotates during operation. It is understood that the rotational speed of the actuator motor of the transfer case is different under different target operating conditions. Optionally, the rotational speed of the actuator motor of the transfer case corresponding to the target operating condition can be determined by setting a motor speed control unit in the system. This embodiment of the invention does not limit this.

[0082] The preset single-run-in time of the clutch can be understood as the normal time required for a single run-in between the friction plate and the steel plate in the clutch. It is understood that the preset single-run-in time of the clutch is different under different target operating conditions. Optionally, the preset single-run-in time of the clutch corresponding to the target operating condition can be determined by setting a clutch run-in time control unit in the system.

[0083] The preset break-in number can be understood as the minimum number of times that the friction plates and steel plates in the clutch are in a state of complete break-in under the target operating conditions. It can be understood that the preset break-in number of clutches is different under different target operating conditions. Optionally, a clutch break-in number control unit can be set in the system to determine the preset break-in number of clutches corresponding to the target operating conditions.

[0084] The desired torque of the clutch can be understood as the optimal torque of the clutch under the target operating conditions. It is understood that the desired torque of the clutch is different under different target operating conditions. Optionally, the desired torque of the clutch can be determined from the current transfer case's operating instructions.

[0085] The desired motor position of the actuator can be understood as the optimal motor position of the clutch motor under the target operating conditions. It is understood that the desired motor position of the actuator will be different under different target operating conditions. Optionally, the desired motor position of the actuator can be determined by querying the actuator position-torque correspondence curve and based on the desired torque of the current clutch.

[0086] Step S102: Control the clutch to begin break-in based on the rotational speed and desired motor position;

[0087] This step can be understood as determining the speed of the transfer case's actuator motor and the desired motor position corresponding to the target operating condition, and then controlling the clutch to start running according to the determined speed and desired motor position, that is, the clutch begins to break in.

[0088] Optionally, the system can be configured with an input motor unit, an output motor unit, a motor speed control unit, and an input speed control unit. The input motor unit is controlled by the motor speed control unit to provide the input speed to the current transfer case and feeds back the speed signal to the input speed control unit in real time. The output motor unit is controlled by the motor speed control unit to provide the output speed to the current transfer case and feeds back the speed signal to the output speed control unit in real time, thereby providing accurate speed for clutch break-in.

[0089] Optionally, an actuator motor position control unit can be set in the system. The actuator motor position control unit can adjust the position of the actuator motor to control the engagement and disengagement of the clutch, that is, control the start and end of the clutch break-in. In addition, different positions of the actuator motor are strictly related to the input torque. An input torque measurement unit can be set in the system. The input torque measurement unit feeds back the desired torque, and the parameters of the wet clutch controlled by the actuator motor can be obtained by querying the torque-clutch parameter correspondence curve or torque-clutch parameter function according to the desired torque. Thus, the actuator motor position control unit controls the clutch to start the break-in according to the speed and the desired motor position.

[0090] In step S103, in response to the single break-in time being greater than or equal to the preset single break-in time, the motor position is set to the zero position and the break-in count is updated.

[0091] The single break-in time can be understood as the actual break-in time of the clutch under the target operating conditions. Optionally, a break-in time control unit can be set in the system to detect and record the actual single break-in time of the clutch under the target operating conditions in real time. This embodiment of the invention is not limited to this.

[0092] When the single break-in time is greater than or equal to the preset single break-in time, it indicates that the clutch has completed a single break-in. At this time, the control motor position is set to the zero position, that is, the break-in stops and the break-in count is updated. Optionally, a motor position control unit can be set in the system to control the motor position to be set to the zero position. This can avoid the influence of historical data generated by the motor position not returning to zero on the new break-in test process, thereby facilitating the torque transmission test or re-run-in test in the subsequent process, reducing the impact of errors, and ensuring the accuracy of the test results. The embodiments of the present invention are not limited thereto.

[0093] Optionally, in step S103, after controlling the motor position to the zero position and updating the break-in count in response to a single break-in time being greater than or equal to a preset single break-in time, the following execution steps may be included:

[0094] In step S1030, in response to the break-in number being less than the preset break-in number, the clutch is controlled to start break-in and the break-in number is updated.

[0095] When the number of break-in cycles is less than the preset number of break-in cycles, it can be understood that the clutch is not in a properly broken-in state under the target operating conditions, that is, the break-in is not complete, and the clutch needs to be controlled to continue to break in.

[0096] Optionally, a clutch break-in number control unit can be set in the system to detect and record the current clutch break-in number under the target working condition in real time. When the break-in number is detected to be less than the preset break-in number, the clutch can be controlled to start break-in by executing the motor position control unit and the break-in number can be updated. This embodiment of the invention is not limited.

[0097] Understandably, this step responds when the number of break-in cycles is less than the preset number of break-in cycles. That is, when the number of break-in cycles is greater than or equal to the preset number of break-in cycles, it means that the current clutch has completed the break-in process and the next step of torque transmission detection can be performed on the current clutch.

[0098] Optionally, in step S11, controlling the clutch to transmit torque and recording the number of torque transmissions may include the following steps:

[0099] Step S110: Control the clutch to start break-in based on the rotational speed and desired motor position, and control the clutch to transmit torque;

[0100] This step can be understood as determining the speed of the transfer case's actuator motor and the desired motor position corresponding to the target operating condition, then controlling the clutch to start running according to the determined speed and desired motor position, i.e., the clutch begins to break in. At this time, after the above steps, the clutch is in a state of complete break-in, and the clutch torque transmission process can be detected. At this time, the clutch transmission torque is controlled.

[0101] Optionally, an execution motor position control unit can be set in the system to control the clutch to start running and transmit torque according to the speed and desired motor position. This embodiment of the invention is not limited.

[0102] In step S111, in response to the single break-in time being greater than or equal to the preset single break-in time, the motor position is set to the zero position and the number of torque transmissions is updated.

[0103] When the single break-in time is greater than or equal to the preset single break-in time, it indicates that the clutch has completed the single break-in. At this point, the control motor position is set to the zero position, i.e., the break-in stops, and the torque transmission count is updated. Optionally, a motor position control unit can be set in the system to control the motor position to be set to the zero position.

[0104] Optionally, a break-in time control unit can be set in the system to detect and record the break-in time of a single run-in in real time. This embodiment of the invention is not limited to this.

[0105] Optionally, in step S111, after controlling the motor position to the zero position and updating the torque transmission count in response to a single break-in time being greater than or equal to a preset single break-in time, the following execution steps may be included:

[0106] In step S1110, in response to the number of torque transmissions being less than the preset number of torque transmissions, the clutch is controlled to transmit torque, and the number of torque transmissions is updated.

[0107] When the number of torque transmissions is less than the preset number of torque transmissions, it can be understood that the current clutch has not completed the preset torque transmission under the target working condition, and the clutch still needs to be controlled to transmit torque.

[0108] Optionally, a torque transmission count control unit can be set in the system. The torque transmission count control unit can detect and record the current torque transmission count of the clutch under the target working condition in real time. When the torque transmission count is detected to be less than the preset torque transmission count, the clutch can be controlled to start running-in by executing the motor position control unit and the torque transmission count can be updated. This embodiment of the invention is not limited.

[0109] Understandably, this step responds to a torque transmission count that is less than a preset torque transmission count. That is, when the torque transmission count is greater than or equal to the preset torque transmission count, it indicates that the current clutch has completed torque transmission, and the average torque of the current clutch can be determined.

[0110] Optionally, in step S13, determining the transfer case detection result based on the average torque may include the following steps:

[0111] Step S130: Determine the difference between the average torque and the desired torque;

[0112] Step S131: In response to the difference being within a preset range, the first detection result is output.

[0113] Optionally, the difference between the average torque fed back by the post-processing module and the desired torque can be calculated to determine the difference between the average torque and the desired torque.

[0114] The preset range can be understood as the allowable error range of the transmitted torque during the operation of the transfer case. That is, if the error of the transmitted torque during the operation of the transfer case is outside this range, it will affect the normal operation of the current transfer case.

[0115] When the difference between the average torque and the desired torque is within the preset range, it indicates that the error of the current transfer case transmission torque is within the allowable error range, which can ensure the normal operation of the transfer case. At this time, the first detection result is output.

[0116] Optionally, the first test result can be that the current transfer case is qualified, indicating that both the clutch and the actuator motor in the transfer case are qualified.

[0117] Optionally, when the difference between the average torque and the desired torque exceeds the preset range, it indicates that the error of the current transfer case transmission torque has exceeded the allowable error range, and the normal operation of the transfer case cannot be guaranteed. At this time, the detection result of the transfer case failure can be directly output.

[0118] Optionally, the method further includes:

[0119] Step S132: Monitor the motor position, motor current, and output torque of the transfer case's actuator motor;

[0120] Step S133: In response to the failure conditions being met by the motor position, motor current, and output torque, the second detection result is output.

[0121] After each clutch break-in period, the position, current, and torque of the clutch actuator motor can be monitored in real time. Optionally, after the clutch breaks in, it can be determined whether the position, current, and torque of the clutch actuator motor meet the failure conditions. If one of the failure conditions is met, a second detection result is output. The second detection result can be interpreted as the transfer case actuator motor failing, i.e., the actuator motor is unqualified. This achieves the technical effect of targeted diagnosis of various components (such as the actuator motor) in the transfer case.

[0122] Specifically, the system can be configured with an actuator motor position diagnostic unit to diagnose the actuator motor position in real time. When the actuator motor position differs from the preset position or is outside the normal preset position range, a second detection result is output. Similarly, an actuator motor current diagnostic unit can be configured to diagnose the actuator motor current in real time. When the actuator motor current does not match the current-clutch parameter function, a second detection result is output. Finally, an actuator motor output torque diagnostic unit and an actuator motor output torque measurement unit can be configured to diagnose the torque signal fed back by the actuator motor output torque measurement unit in real time. When the clutch torque does not match the output torque-clutch parameter function, a second detection result is output.

[0123] Figure 3 This is a system block diagram of a transfer case detection method according to one embodiment of the present invention, such as... Figure 3 The diagram illustrates the specific implementation process of the above steps. Figure 3 It includes: hardware component 100, bench control and measurement module 200, transfer case control and measurement module 300, diagnostic module 400, post-processing module 500, and conformity module 600.

[0124] The hardware system 100 includes an input motor 101, a torque sensor 102, a transfer case sample 103, and an output motor 104. The input motor 101 provides the input speed to the transfer case sample 103, is controlled by a motor speed control unit 201, and feeds back the speed signal to the speed measurement unit 203 in real time. The torque sensor 102 acquires the input torque in real time and feeds back the torque signal to the input torque measurement unit 202. The transfer case sample 103 is a transfer case sample used for transfer case testing; its input end is connected to the input motor 101, and its output end is connected to the output motor 104. The output motor 104 is controlled by the speed control unit 201, providing the output speed to the transfer case sample 103 and feeding back the speed signal to the output speed control unit 203 in real time.

[0125] The bench control and measurement module 200 includes a motor speed control unit 201, an input torque measurement unit 202, a speed measurement unit 203, and a shutdown control unit 204 for offline detection. The motor speed control unit 201 sets the input and output motor speeds to create a desired speed difference between the input and output ends of the transfer case sample. The input torque measurement unit 202 receives torque signals from the torque sensor 102. The speed measurement unit 203 receives speed signals from the input motor 101 and the output motor 104. The shutdown control unit 204 controls the start and stop of offline detection based on detection commands, diagnostic abnormality signals from the diagnostic module 400, and pass / fail signals from the pass / fail module 600.

[0126] The transfer case control and measurement module 300 includes a transfer case actuator motor position control unit 301, a transfer case actuator motor current measurement unit 302, a transfer case actuator motor output torque measurement unit 303, a clutch break-in number control unit 304, a transfer case torque transmission number control unit 305, and a break-in time control unit 306. The transfer case actuator motor position control unit 301 controls the position of the actuator motor of the transfer case sample 103. The transfer case actuator motor current measurement unit 302 measures the current inside the transfer case actuator motor and feeds back the current signal in real time to the transfer case actuator motor current diagnostic unit 402 to diagnose whether there are any abnormalities in the transfer case actuator motor and the worm gear. Specifically, if there are no abnormalities, the offline detection start / stop control unit 204 controls the offline detection system to run normally downwards. If there are abnormalities, the offline detection start / stop control unit 204 controls the offline detection system to stop and feeds back to the actuator motor qualification unit 603 to show that the sample box is in an abnormal state, does not meet the offline detection index, and cannot be used for loading. The transfer case actuator motor output torque measurement unit 303 measures the output torque of the transfer case actuator motor and feeds back the torque signal in real time to the transfer case actuator motor output torque diagnostic unit 403 to diagnose whether there are any abnormalities in the transfer case actuator motor and the worm gear. Specifically, if there are no abnormalities, the offline detection start / stop control unit 204 controls the offline detection system to run normally downwards. The online inspection system operates normally. If an abnormality is detected, the offline inspection start / stop control unit 204 will stop the offline inspection system and send feedback to the actuator motor qualification unit 603 to display that the sample box is in an abnormal state, does not meet the offline inspection indicators, and cannot be used for vehicle installation. The clutch break-in number control unit 304 is used to record the number of clutch break-ins. Specifically, when the transfer case actuator motor position control unit 301 completes one clutch engagement and disengagement action, the count is incremented by 1. The transfer case torque transmission number control unit 305 is used to record the number of torque transmissions of the transfer case. Specifically, when the clutch slippage number control unit completes a preset number of clutch engagement and disengagement actions, the count is incremented by 1. The break-in time control unit 306 is used to record the break-in time of the transfer case. Specifically, the timing starts at the beginning of a single break-in and ends when the single break-in ends, and the actual break-in time is reset to zero. During the timing period, the actual break-in time is compared with the set break-in time threshold. If it is greater than the break-in time threshold, the offline inspection start / stop control unit 204 will be sent to stop the offline inspection system.

[0127] The diagnostic module 400 includes a transfer case actuator motor position diagnostic unit 401, a transfer case actuator motor current diagnostic unit 402, and a transfer case actuator motor output torque diagnostic unit 403. Specifically, the transfer case actuator motor position diagnostic unit 401 is used to diagnose in real time whether the actuator motor position has reached the value set by the transfer case actuator motor position control unit 301; the transfer case actuator motor current diagnostic unit 402 is used to diagnose in real time the current signal fed back by the transfer case actuator motor current measurement unit 302; and the transfer case actuator motor output torque diagnostic unit 403 is used to diagnose in real time the torque signal fed back by the transfer case actuator motor output torque measurement unit 303.

[0128] The post-processing module 500 includes a break-in torque post-processing unit 501. The break-in torque post-processing unit 501 is used to determine the average torque.

[0129] The qualification module 600 includes an input torque qualification unit 601 and an actuator motor qualification unit 602. The input torque qualification unit 601 receives torque results from the break-in torque post-processing unit 501; the actuator motor qualification unit 602 receives signals from the transfer case actuator motor position diagnostic unit 401, the transfer case actuator motor current diagnostic unit 402, and the transfer case actuator motor output torque diagnostic unit 403.

[0130] Figure 3 When the vehicle control system shown is running, firstly, the tester issues a test command, which initiates the test via the offline test start-stop control unit 204. The motor speed control unit 201 determines the motor speed, the break-in time control unit 306 determines the preset single break-in time, the clutch break-in count control unit 304 determines the preset break-in count, and the transfer case actuator motor position control unit 301 controls the clutch to begin break-in, recording the number of clutch break-ins via the clutch break-in count control unit 304 (i.e., step S10). Then, the clutch break-in count control unit 304 records the clutch break-in count. When the break-in count is greater than or equal to the preset break-in count, the transfer case actuator motor position control unit 301 controls the clutch torque transmission, recording the transfer case torque transmission count via the transfer case torque transmission count control unit 305 (i.e., step S11). When the torque transmission count is greater than or equal to the preset torque transmission count, the break-in torque post-processing unit 501 determines the average torque (i.e., step S12). Finally, the torque result fed back by the diagnostic break-in torque post-processing unit 501 is received by the input torque qualification unit 601, and the test result is output (i.e., step S13). At the same time, the signals fed back by the transfer case motor position diagnosis unit 401, the transfer case motor current diagnosis unit 402 and the transfer case motor output torque diagnosis unit 403 can also be received by the execution motor qualification unit 602, and the test result is output.

[0131] Figure 4 This is a flowchart of a transfer case detection method according to one embodiment of the present invention, such as... Figure 4 As shown, the transfer case is first tested. The motor position of the transfer case's actuator motor is set to the zero position, i.e., the actuator motor is adjusted to zero. The system then checks whether the actuator motor has returned to zero. If it has not returned to zero, the zero adjustment is performed again until the motor returns to zero.

[0132] After confirming that the actuator motor is in the zero position, the actuator motor speed, preset single-cycle break-in time, and preset break-in number are set according to the actuator motor speed, preset single-cycle break-in time, and preset break-in number of times corresponding to different operating conditions, and the motor is controlled to start the break-in process. During the break-in process, the actuator motor position, motor current, and output torque are monitored in real time to diagnose whether there are any abnormalities in the parameters of actuator motor position, current, and output torque. If an abnormality is found, the actuator failure is directly output, that is, the second test result is output, indicating that the transfer case is unqualified. If no abnormality is found, the break-in test continues and monitoring is maintained.

[0133] After the break-in period begins, record the time of each break-in cycle. Determine if the time is greater than or equal to the preset break-in time. If the time is greater than or equal to the preset time, the clutch has completed one break-in cycle. Set the control motor to the zero position and increment the break-in count. If the time is less than the preset time, the clutch has not completed one break-in cycle. Continue the break-in process until the time is greater than or equal to the preset time.

[0134] After a single break-in period, it is further determined whether the number of break-in cycles has reached the preset number. If the recorded number of break-in cycles is less than the preset number, it means that the clutch has not yet completed the break-in process, so the clutch continues to be controlled to start the break-in process, and the break-in cycle count is updated. If the number of break-in cycles is greater than or equal to the preset number, it means that the clutch has completed the break-in process, and the next step of torque transmission detection is performed.

[0135] After the clutch has completed its break-in period, the clutch torque transmission process is tested, including the actuator motor operation and clutch break-in, while simultaneously monitoring the actuator motor position, current, and output torque. The system diagnoses whether the actuator motor position, current, and output torque meet the failure conditions, i.e., whether there are any abnormalities. If an abnormality is found, the actuator failure is directly output as the second test result; otherwise, the testing continues.

[0136] After the break-in period begins, record the time of each break-in session. Diagnose whether the time of each break-in session is greater than or equal to the preset time. If the time of each break-in session is greater than or equal to the preset time, control the motor position to the zero position and update the torque transmission count. That is, when a single torque transmission ends, the torque transmission count is incremented by one. If the time of each break-in session is less than the preset time, it means that the clutch has not completed a single torque transmission. Then, execute the motor execution and clutch break-in again until the time of each break-in session is greater than or equal to the preset time.

[0137] After a single break-in period, the system further checks whether the number of torque transmission cycles is greater than or equal to the preset number of torque transmission cycles, indicating whether torque transmission is complete. If the number of torque transmission cycles is less than the preset number, it indicates that torque transmission is incomplete, and the clutch is controlled to begin break-in, while the number of torque transmission cycles is updated. If the number of torque transmission cycles is greater than or equal to the preset number, it indicates that torque transmission is complete. The average torque of the clutch is then determined, and the difference between the average torque and the expected torque determined based on the operating conditions is calculated. The system checks whether the difference is within a preset range. If the difference is within the preset range, the first test result is output, indicating that the current transfer case sample is qualified. If the difference is not within the preset range, the clutch is determined to be faulty, and a test result indicating that the current transfer case sample is unqualified is output, ending the process.

[0138] 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 the present invention, 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 described in the various embodiments of the present invention.

[0139] This embodiment also provides a transfer case detection device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0140] Figure 5 This is a structural block diagram of a transfer case detection device according to one embodiment of the present invention, such as... Figure 5As shown, a transfer case detection device 500 is used as an example. This device includes: a break-in module 501, which controls the transfer case clutch to begin break-in in response to a detection command and records the number of break-in cycles, wherein the detection command is determined according to the operating conditions; a torque transmission module 502, which controls the clutch to transmit torque in response to the number of break-in cycles being greater than or equal to a preset number of break-in cycles and records the number of torque transmission cycles, wherein the preset number of break-in cycles is determined according to the detection command; a processing module 503, which determines the average torque of the clutch in response to the number of torque transmission cycles being greater than or equal to the preset number of torque transmission cycles, wherein the preset number of torque transmission cycles is determined according to the number of break-in cycles; and a determination module 504, which determines the detection result of the transfer case based on the average torque.

[0141] Optionally, the break-in module 501 is also used to control the motor position of the transfer case's actuator motor to be at the zero position of the actuator motor.

[0142] Optionally, the break-in module 501 is further configured to, in response to receiving a detection command under the target operating condition, determine the rotational speed of the transfer case's actuator motor, the preset single break-in time of the clutch, the preset number of break-in cycles, the desired torque of the clutch, and the desired motor position of the actuator motor corresponding to the target operating condition, wherein the desired motor position corresponds to the desired torque; control the clutch to start break-in based on the rotational speed and the desired motor position; and, in response to the single break-in time being greater than or equal to the preset single break-in time, control the motor position to be set to the zero position and update the number of break-in cycles.

[0143] Optionally, the break-in module 501 is also used to control the clutch to start break-in and update the break-in number in response to the break-in number being less than the preset break-in number.

[0144] Optionally, the torque transmission module 502 is also used to control the clutch to start break-in based on the rotational speed and desired motor position, and to control the torque transmitted by the clutch; in response to a single break-in time being greater than or equal to a preset single break-in time, to control the motor position to be in the zero position and to update the number of torque transmissions.

[0145] Optionally, the torque transmission module 502 is also used to control the transmission torque of the clutch and update the torque transmission number in response to the torque transmission number being less than the preset torque transmission number.

[0146] Optionally, the determining module 504 is further configured to determine the difference between the average torque and the desired torque; and output a first detection result in response to the difference being within a preset range.

[0147] Optionally, the determining module 504 is also used to monitor the motor position, motor current and output torque of the transfer case's actuator motor; and output a second detection result in response to the motor position, motor current and output torque meeting the failure conditions.

[0148] 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.

[0149] Embodiments of the present invention also provide a vehicle for performing the steps in any of the above method embodiments.

[0150] Optionally, in this embodiment, the vehicle may be configured to store a computer program for performing the following steps:

[0151] Step S1: In response to the detection command, control the transfer case clutch to start break-in and record the number of clutch break-in cycles;

[0152] Step S2: In response to the break-in number being greater than or equal to the preset break-in number, control the clutch to transmit torque and record the number of torque transmissions;

[0153] Step S3: In response to the number of torque transmissions being greater than or equal to the preset number of torque transmissions, determine the average torque of the clutch;

[0154] Step S4: Determine the transfer case test result based on the average torque.

[0155] Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, wherein the computer program is configured to perform the steps in any of the above method embodiments when run on a computer or processor.

[0156] Optionally, in this embodiment, the computer-readable storage medium may be configured to store a computer program for performing the following steps:

[0157] Step S1: In response to the detection command, control the transfer case clutch to start break-in and record the number of clutch break-in cycles;

[0158] Step S2: In response to the break-in number being greater than or equal to the preset break-in number, control the clutch to transmit torque and record the number of torque transmissions;

[0159] Step S3: In response to the number of torque transmissions being greater than or equal to the preset number of torque transmissions, determine the average torque of the clutch;

[0160] Step S4: Determine the transfer case test result based on the average torque.

[0161] 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.

[0162] Embodiments of the present invention 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 above method embodiments.

[0163] 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:

[0164] Step S1: In response to the detection command, control the transfer case clutch to start break-in and record the number of clutch break-in cycles;

[0165] Step S2: In response to the break-in number being greater than or equal to the preset break-in number, control the clutch to transmit torque and record the number of torque transmissions;

[0166] Step S3: In response to the number of torque transmissions being greater than or equal to the preset number of torque transmissions, determine the average torque of the clutch;

[0167] Step S4: Determine the transfer case test result based on the average torque.

[0168] 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.

[0169] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0170] In the above embodiments of the present invention, 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.

[0171] 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.

[0172] 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.

[0173] Furthermore, the functional units in the various embodiments of the present invention 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.

[0174] 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 the present invention, 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 the present invention. 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.

[0175] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A transfer case detection method, characterized in that, include: In response to receiving a detection command under a target operating condition, the speed of the actuator motor of the transfer case corresponding to the target operating condition, the preset single break-in time of the clutch of the transfer case, the preset number of break-in cycles, the desired torque of the clutch, and the desired motor position of the actuator motor are determined, wherein the desired motor position is determined by the actuator motor position-torque correspondence curve and the desired torque. The motor position of the actuator is controlled to be at the zero position of the actuator; The clutch is controlled to begin break-in based on the rotational speed and the desired motor position, and the number of break-in cycles of the clutch is recorded. In response to the clutch's single break-in time being greater than or equal to the preset single break-in time, the motor position is controlled to be at the zero position, and the break-in count is updated; In response to the break-in number being less than the preset break-in number, the clutch is controlled to begin break-in, and the break-in number is updated; In response to the break-in number being greater than or equal to a preset break-in number, the clutch transmission torque is controlled and the number of torque transmissions is recorded, wherein the preset break-in number is determined according to the detection command; In response to the number of torque transmissions being greater than or equal to a preset number of torque transmissions, the average torque of the clutch is determined, wherein the preset number of torque transmissions is determined based on the number of break-in cycles, and the average torque is determined based on the transmission torque value in the effective break-in range, wherein the effective break-in range is the range in which the transmission torque value is greater than half of the desired torque of the clutch. The test result of the transfer case is determined based on the average torque.

2. The method according to claim 1, characterized in that, The control of the clutch to transmit torque and the recording of the number of torque transmissions include: The clutch is controlled to begin break-in based on the rotational speed and the desired motor position, and the torque transmitted by the clutch is also controlled. In response to the single break-in time being greater than or equal to the preset single break-in time, the motor position is controlled to be at the zero position, and the number of torque transmissions is updated.

3. The method according to claim 2, characterized in that, After responding to the single break-in time being greater than or equal to the preset single break-in time, controlling the motor position to be at the zero position, and updating the number of torque transmissions, the method further includes: In response to the torque transmission count being less than the preset torque transmission count, the clutch transmission torque is controlled, and the torque transmission count is updated.

4. The method according to any one of claims 2-3, characterized in that, The step of determining the detection result of the transfer case based on the average torque includes: Determine the difference between the average torque and the desired torque; In response to the difference being within a preset range, a first detection result is output, wherein the first detection result indicates that both the clutch and the actuator motor in the transfer case are qualified.

5. The method according to any one of claims 1-3, characterized in that, Also includes: Monitor the motor position, motor current, and output torque of the transfer case's actuator motor; In response to the motor position, motor current and output torque satisfying the failure condition, a second detection result is output.

6. A transfer case detection device, characterized in that, include: A break-in module is configured to respond to a detection command, specifically, upon receiving a detection command under a target operating condition, determine the rotational speed of the transfer case's actuator motor corresponding to the target operating condition, the preset single break-in time of the transfer case's clutch, the preset number of break-in cycles, the desired torque of the clutch, and the desired motor position of the actuator motor. The desired motor position is determined based on the actuator motor position-torque correspondence curve and the desired torque. The module also controls the actuator motor position to be at its zero position. Based on the rotational speed and the desired motor position, the module controls the clutch to begin break-in and records the number of break-in cycles. If the single break-in time of the clutch is greater than or equal to the preset single break-in time, the module controls the motor position to be at the zero position and updates the number of break-in cycles. If the number of break-in cycles is less than the preset number of break-in cycles, the module controls the clutch to begin break-in and updates the number of break-in cycles. A torque transmission module is used to control the transmission torque of the clutch in response to the break-in number being greater than or equal to a preset break-in number, and to record the torque transmission number, wherein the preset break-in number is determined according to the detection command; A processing module is configured to determine the average torque of the clutch in response to the number of torque transmissions being greater than or equal to a preset number of torque transmissions, wherein the preset number of torque transmissions is determined based on the number of break-in cycles, and the average torque is determined based on the transmission torque value in the effective break-in range, wherein the effective break-in range is the range in which the transmission torque value is greater than half of the expected torque of the clutch. A determining module is used to determine the detection result of the transfer case based on the average torque.

7. 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 transfer case detection method as described in any one of claims 1 to 5.

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