Electronic limited slip differential torsion durability test method and system

Abstract

The invention provides a torsion durability test method and system for an electronic limited slip differential. The method comprises the following steps: acquiring product design parameters of the electronic limited slip differential; based on the product design parameters, torsion testing is conducted on the electronic limited slip differential through a preset testing device so as to collect corresponding positive and negative peak torque and pulse frequency, and a loading torque waveform matched with the actual working condition of the electronic limited slip differential is matched synchronously according to the positive and negative peak torque and the pulse frequency; calculating a corresponding total pulse frequency of a load spectrum according to the loading torque waveform through a pulse frequency calculation unit; and a final loading positive and negative torque value and loading times matched with the electronic limited slip differential are determined through a torque value calibration unit according to the total pulse times of the load spectrum, and the durability degree of the electronic limited slip differential is determined synchronously according to the final loading positive and negative torque value and the loading times. The corresponding durability test can be accurately completed according to the characteristics of the electronic limited slip differential, and the test efficiency is correspondingly improved.

Description

A method and system for testing the torsional durability of an electronic limited-slip differential Technical Field

[0001] This invention relates to the field of differential testing technology, and in particular to a method and system for testing the torsional durability of an electronic limited-slip differential. Background Technology

[0002] With the development of electric vehicle technology, the high torque and instantaneous output characteristics of electric motors have enabled them to achieve acceleration capabilities comparable to high-performance cars. Electronic limited-slip differentials (eLSDs), as key components for improving vehicle traction, handling, and driving stability, are increasingly widely used in passenger vehicles. eLSDs, through a multi-plate clutch-type pressure clutch managed by an electronic control unit (ECU), achieve a continuously variable locking torque of 3000+ Nm from 0% to 100%, quickly suppressing slippage on one side of the wheel and transferring torque to the wheel with traction.

[0003] In actual use, when the eLSD transmits torque for a long time, the splines of its friction plates and steel plates will repeatedly knock against the spline grooves of the input and output hubs, which will lead to surface dents in the spline grooves, slippage and jamming of the clutch plates, or even opening and closing failures, seriously affecting the service life of the eLSD and the driving safety of the vehicle.

[0004] Furthermore, existing testing methods mostly verify the torque durability of eLSD by performing torque distribution according to a preset load spectrum using a complete transmission. However, there are two major problems: first, it requires a very high level of maturity in the transmission and its control software; second, the testing is conducted late, and if design defects are found and rework is required, it may lead to simultaneous adjustments of related parts, resulting in a significant increase in R&D costs and a significant loss of time efficiency, which seriously affects the product development schedule. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a torsional durability testing method and system for electronic limited-slip differentials, so as to solve the problems of high testing requirements and low time efficiency in the durability testing process of the prior art.

[0006] The first aspect of this invention proposes a method for torsional durability testing of an electronic limited-slip differential, wherein the method includes: acquiring product design parameters of the electronic limited-slip differential; performing a torsional test on the electronic limited-slip differential using a preset testing device based on the product design parameters to acquire corresponding positive and negative peak torques and pulse frequencies, and simultaneously matching a loading torque waveform adapted to the actual operating conditions of the electronic limited-slip differential based on the positive and negative peak torques and the pulse frequencies; calculating the corresponding total number of pulses of the load spectrum based on the loading torque waveform using a pulse count calculation unit; determining the final loading positive and negative torque values ​​and the number of loading cycles adapted to the electronic limited-slip differential based on the total number of pulses of the load spectrum using a torque value calibration unit, and simultaneously determining the durability of the electronic limited-slip differential based on the final loading positive and negative torque values ​​and the number of loading cycles.

[0007] The beneficial effects of this invention are as follows: This technical solution precisely addresses the core problems of stringent durability testing requirements and low time efficiency in existing electronic limited-slip differentials. It first collects core product design parameters such as maximum forward and reverse torque and the number of load cycles throughout the product's lifespan. Then, based on these parameters, targeted torsional testing is conducted, simultaneously matching the loading torque waveform to actual operating conditions. Finally, the loading parameters are optimized by combining pulse count calculation and torque value calibration. This approach not only significantly reduces the difficulty of testing operations and compliance requirements, but also significantly shortens the testing cycle and improves time efficiency. Furthermore, it ensures that the durability assessment results highly match the actual usage scenarios, balancing testing convenience and result accuracy.

[0008] Furthermore, the step of calculating the total number of load spectrum pulses corresponding to the loading torque waveform using the pulse count calculation unit includes: when a loading torque waveform adapted to the electronic limited-slip differential is determined in real time, determining the load spectrum of the electronic limited-slip differential based on the loading torque waveform; determining the maximum forward torque, maximum reverse torque, total forward torque accumulated over the entire lifespan, and total reverse torque accumulated over the entire lifespan of the electronic limited-slip differential based on the load spectrum, and simultaneously calculating the number of forward and reverse pulses using a first preset algorithm; and integrating the number of forward and reverse pulses to generate the total number of load spectrum pulses.

[0009] Furthermore, the expression for the first preset algorithm is: forward pulse count = total accumulated forward torque over the entire lifespan ÷ maximum forward torque; reverse pulse count = total accumulated reverse torque over the entire lifespan ÷ maximum reverse torque. Further, the step of determining the final loading forward and reverse torque values ​​and loading counts adapted to the electronic limited-slip differential based on the total number of pulses in the load spectrum by the torque value calibration unit includes: generating a corresponding torque change curve based on the total number of pulses in the load spectrum by the torque value calibration unit; detecting the maximum forward and reverse torques corresponding to the electronic limited-slip differential based on the torque change curve; and simultaneously calculating the final loading forward and reverse torque values ​​in conjunction with the second preset algorithm.

[0010] Furthermore, the expression for the second preset algorithm is: Final loading positive and negative torque value = maximum positive and negative torque × safety factor, where the safety factor is set according to the torque control accuracy of the electronic limited-slip differential.

[0011] Furthermore, the loading torque waveform includes sine wave, half-sine wave, triangular wave and trapezoidal wave.

[0012] Furthermore, the product design parameters include maximum forward torque, maximum reverse torque, total lifespan torque loading cycles, and torque distribution pattern.

[0013] A second aspect of this invention proposes an electronic limited-slip differential torsional durability testing system, comprising: a data acquisition module for acquiring product design parameters of the electronic limited-slip differential; a matching module for performing a torsional test on the electronic limited-slip differential using a preset testing device based on the product design parameters, to acquire corresponding positive and negative peak torques and pulse frequencies, and simultaneously matching a loading torque waveform adapted to the actual operating conditions of the electronic limited-slip differential based on the positive and negative peak torques and the pulse frequencies; a calculation module for calculating the corresponding total number of pulses in the load spectrum based on the loading torque waveform using a pulse count calculation unit; and a processing module for determining the final loading positive and negative torque values ​​and loading counts adapted to the electronic limited-slip differential based on the total number of pulses in the load spectrum using a torque value calibration unit, and simultaneously determining the durability of the electronic limited-slip differential based on the final loading positive and negative torque values ​​and the loading counts.

[0014] Furthermore, the calculation module is specifically used for: when the loading torque waveform adapted to the electronic limited-slip differential is determined in real time, determining the load spectrum of the electronic limited-slip differential based on the loading torque waveform; determining the maximum forward torque, maximum reverse torque, total forward torque over the entire lifespan, and total reverse torque over the entire lifespan of the electronic limited-slip differential based on the load spectrum, and simultaneously calculating the number of forward and reverse pulses using a first preset algorithm; and integrating the number of forward and reverse pulses to generate the total number of pulses in the load spectrum.

[0015] Furthermore, the expression of the first preset algorithm is: forward pulse count = total accumulated forward torque over the entire lifespan ÷ maximum forward torque; reverse pulse count = total accumulated reverse torque over the entire lifespan ÷ maximum reverse torque. Further, the processing module is specifically used to: generate a corresponding torque change curve based on the total number of pulses in the load spectrum through the torque value calibration unit; detect the maximum forward and reverse torques corresponding to the electronic limited-slip differential based on the torque change curve; and simultaneously calculate the final loaded forward and reverse torque values ​​in conjunction with the second preset algorithm.

[0016] Furthermore, the expression for the second preset algorithm is: Final loading positive and negative torque value = maximum positive and negative torque × safety factor, where the safety factor is set according to the torque control accuracy of the electronic limited-slip differential.

[0017] Furthermore, the loading torque waveform includes sine wave, half-sine wave, triangular wave and trapezoidal wave.

[0018] Furthermore, the product design parameters include maximum forward torque, maximum reverse torque, total lifespan torque loading cycles, and torque distribution pattern.

[0019] A third aspect of the present invention proposes a computer, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the torsional durability test method for an electronic limited-slip differential as described above.

[0020] A fourth aspect of the present invention proposes: a readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the torsional durability test method for an electronic limited-slip differential as described above.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 is a flowchart of the torsional durability test method for an electronic limited-slip differential provided in the first embodiment of the present invention; Figure 2 is a structural schematic diagram of the preset test device provided in the second embodiment of the present invention; Figure 3 is a flowchart of the test monitoring method provided in the second embodiment of the present invention; Figure 4 is a structural block diagram of the torsional durability test system for an electronic limited-slip differential provided in the third embodiment of the present invention.

[0023] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please refer to Figure 1, which shows the torsional durability test method for electronic limited-slip differentials provided in the first embodiment of the present invention. The torsional durability test method for electronic limited-slip differentials provided in this embodiment can quickly and effectively conduct targeted tests on complete electronic limited-slip differentials, thereby improving test efficiency.

[0028] Specifically, this embodiment provides a method for torsional durability testing of an electronic limited-slip differential, wherein the method includes: step S10, acquiring product design parameters of the electronic limited-slip differential; step S20, based on the product design parameters, performing a torsional test on the electronic limited-slip differential using a preset testing device to acquire corresponding positive and negative peak torques and pulse frequencies, and simultaneously matching a loading torque waveform adapted to the actual operating conditions of the electronic limited-slip differential based on the positive and negative peak torques and the pulse frequencies; step S30, calculating the corresponding total number of pulses of the load spectrum based on the loading torque waveform using a pulse count calculation unit; step S40, determining the final loading positive and negative torque values ​​and loading counts adapted to the electronic limited-slip differential based on the total number of pulses of the load spectrum using a torque value calibration unit, and simultaneously determining the durability of the electronic limited-slip differential based on the final loading positive and negative torque values ​​and the loading counts.

[0029] In a further step of the second embodiment, the step of calculating the total number of load spectrum pulses corresponding to the loading torque waveform by the pulse count calculation unit includes: when a loading torque waveform adapted to the electronic limited-slip differential is determined in real time, the load spectrum of the electronic limited-slip differential is determined based on the loading torque waveform; the maximum forward torque, maximum reverse torque, total forward torque accumulated over the entire lifespan, and total reverse torque accumulated over the entire lifespan of the electronic limited-slip differential are determined based on the load spectrum, and the number of forward and reverse pulses are calculated simultaneously using a first preset algorithm; the number of forward and reverse pulses are integrated and processed to generate the total number of load spectrum pulses.

[0030] Furthermore, the expression for the first preset algorithm is: forward pulse count = total accumulated forward torque over the entire lifespan ÷ maximum forward torque; reverse pulse count = total accumulated reverse torque over the entire lifespan ÷ maximum reverse torque. Further, the step of determining the final loading forward and reverse torque values ​​and loading counts adapted to the electronic limited-slip differential based on the total number of pulses in the load spectrum by the torque value calibration unit includes: generating a corresponding torque change curve based on the total number of pulses in the load spectrum by the torque value calibration unit; detecting the maximum forward and reverse torques corresponding to the electronic limited-slip differential based on the torque change curve; and simultaneously calculating the final loading forward and reverse torque values ​​in conjunction with the second preset algorithm.

[0031] Furthermore, the expression for the second preset algorithm is: Final loading positive and negative torque value = maximum positive and negative torque × safety factor, where the safety factor is set according to the torque control accuracy of the electronic limited-slip differential.

[0032] Furthermore, the loading torque waveform includes sine wave, half-sine wave, triangular wave and trapezoidal wave.

[0033] Furthermore, the product design parameters include maximum forward torque, maximum reverse torque, total lifespan torque loading cycles, and torque distribution pattern.

[0034] In addition, it should be noted in this embodiment that the torsional durability test method for the electronic limited-slip differential provided in this embodiment is specifically implemented by the following steps: First, input the eLSD product design parameters, the core of which includes the maximum forward torque, the maximum reverse torque, the number of torque loading cycles throughout the lifespan, and the distribution law of the loaded torque; Second, obtain the peak forward and reverse torques and pulse frequency, and select a loading torque waveform that matches the actual operating conditions of the product. Optional waveforms include sine waves, half-sine waves, triangular waves, or trapezoidal waves, etc., to ensure that the load spectrum can accurately simulate the actual operating environment of the vehicle; Third, calculate the load spectrum through the pulse count calculation unit. The total number of pulses is calculated as follows: forward pulse count = total sum of forward torque over the entire lifespan ÷ maximum forward torque; reverse pulse count = total sum of reverse torque over the entire lifespan ÷ maximum reverse torque. The fourth step involves determining the final loading forward and reverse torque values ​​using the torque calibration unit. The calibration formula is: final loading forward and reverse torque values ​​= maximum forward and reverse torque × safety factor (the safety factor is set according to the product's torque control accuracy; for example, when the torque control accuracy is 10%, the safety factor can be 1.1). After the load spectrum is generated, bench compatibility verification is required to ensure that it matches the testing capabilities of the pulse bench without exceeding the design redundancy range of the eLSD product.

[0035] Further, referring to Figure 2, this embodiment also provides a torsion test device. The core of building this torsion test device lies in constructing a stable and reliable torque transmission path. The specific steps are as follows: First, the clutch steel plate and friction plate are fixed together by riveting or welding to form an integrated clutch plate group of 10, which is then assembled into the eLSD assembly under test. The inner spline of the plate group is connected to the output hub of 20, and the outer spline is connected to the differential housing of 30. The differential housing of 60 holds the plate group to ensure that there is no axial displacement during the test. Second, the left end of the eLSD assembly under test is installed on the support flange of 40 and mounted on the support 1 of 50, and the right end is fixed on the support 2 of 80 with the fixing flange of 70. Finally, one end of the differential shaft of 100 is connected to the spline sleeve flange of the torsion pulse tester of 150, and the other end of the shaft is connected to the output hub of 20. At the same time, a torque sensor of 120 and an angle sensor of 130 are installed between the actuator of 140 and the transition flange of 90 to ensure accurate acquisition of torque and angle signals during the test.

[0036] In addition, it should be noted in this embodiment that, referring to Figure 3, this embodiment also provides a monitoring method with failure early warning. Specifically, the workflow of this monitoring method is as follows: First, after completing the installation of the test sample and the setup of the torsion test device, the entire test system is initialized and debugged; Second, the core functional parameters of the test are configured through the host computer, including the loading torque waveform, rotation angle safety range, torque safety threshold, and total number of load spectrum pulses; Third, the torsion actuator is started, and the pulse stage is controlled to output torsion pulses according to the preset load spectrum to carry out the torsion durability test; Fourth, the real-time data of the torque sensor and angle sensor are synchronously collected through the data acquisition unit, and the data is transmitted to the host computer. The fifth step involves the host computer processing the collected data in real time, dynamically monitoring the trends of maximum torque, minimum torque, and rotation angle. Simultaneously, the control unit implements closed-loop torque control, dynamically adjusting the actuator output based on the actual collected torque data. All test data is displayed in real time and automatically stored. The sixth step involves the failure warning unit continuously judging anomalies in the collected data. If the rotation angle exceeds the safe range or the torque exceeds the safe threshold, an audible and visual alarm is immediately triggered. Simultaneously, the test stop unit automatically cuts off the test process to prevent damage to the sample. The seventh step involves exporting all test data through the data export and analysis unit, combining the data to conduct an eLSD torsional durability performance evaluation, and verifying the reliability of the product design.

[0037] Please refer to Figure 4. The third embodiment of the present invention provides: an electronic limited-slip differential torsional durability testing system, wherein the system includes: a data acquisition module for acquiring product design parameters of the electronic limited-slip differential; a matching module for performing a torsional test on the electronic limited-slip differential using a preset testing device based on the product design parameters, to acquire corresponding positive and negative peak torques and pulse frequencies, and simultaneously matching a loading torque waveform adapted to the actual operating conditions of the electronic limited-slip differential based on the positive and negative peak torques and the pulse frequencies; a calculation module for calculating the corresponding total number of pulses of the load spectrum based on the loading torque waveform using a pulse count calculation unit; and a processing module for determining the final loading positive and negative torque values ​​and loading counts adapted to the electronic limited-slip differential based on the total number of pulses of the load spectrum using a torque value calibration unit, and simultaneously determining the durability of the electronic limited-slip differential based on the final loading positive and negative torque values ​​and the loading counts.

[0038] Furthermore, the calculation module is specifically used for: when the loading torque waveform adapted to the electronic limited-slip differential is determined in real time, determining the load spectrum of the electronic limited-slip differential based on the loading torque waveform; determining the maximum forward torque, maximum reverse torque, total forward torque over the entire lifespan, and total reverse torque over the entire lifespan of the electronic limited-slip differential based on the load spectrum, and simultaneously calculating the number of forward and reverse pulses using a first preset algorithm; and integrating the number of forward and reverse pulses to generate the total number of pulses in the load spectrum.

[0039] Furthermore, the expression of the first preset algorithm is: forward pulse count = total accumulated forward torque over the entire lifespan ÷ maximum forward torque; reverse pulse count = total accumulated reverse torque over the entire lifespan ÷ maximum reverse torque. Further, the processing module is specifically used to: generate a corresponding torque change curve based on the total number of pulses in the load spectrum through the torque value calibration unit; detect the maximum forward and reverse torques corresponding to the electronic limited-slip differential based on the torque change curve; and simultaneously calculate the final loaded forward and reverse torque values ​​in conjunction with the second preset algorithm.

[0040] Furthermore, the expression for the second preset algorithm is: Final loading positive and negative torque value = maximum positive and negative torque × safety factor, where the safety factor is set according to the torque control accuracy of the electronic limited-slip differential.

[0041] Furthermore, the loading torque waveform includes sine wave, half-sine wave, triangular wave and trapezoidal wave.

[0042] Furthermore, the product design parameters include maximum forward torque, maximum reverse torque, total lifespan torque loading cycles, and torque distribution pattern.

[0043] The fourth embodiment of the present invention provides a computer, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the torsional durability test method for electronic limited-slip differentials as described above.

[0044] The fifth embodiment of the present invention provides a readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the torsional durability test method for electronic limited-slip differentials as described above.

[0045] In summary, the torsional durability testing method and system for electronic limited-slip differentials provided in the above embodiments of the present invention can quickly and effectively complete targeted tests of electronic limited-slip differentials, thereby significantly improving testing efficiency.

[0046] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside in the same processor; or the above modules can be located in different processors in any combination.

[0047] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-including system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0048] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0049] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0050] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for testing the torsional durability of an electronic limited-slip differential, characterized in that, The method includes: acquiring product design parameters of the electronic limited-slip differential; based on the product design parameters, performing a torsional test on the electronic limited-slip differential using a preset testing device to acquire corresponding peak torque and pulse frequency in both directions; simultaneously matching the peak torque and pulse frequency to a loading torque waveform adapted to the actual operating conditions of the electronic limited-slip differential; calculating the total number of pulses in the load spectrum based on the loading torque waveform using a pulse count calculation unit; determining the final loading torque values ​​and loading count adapted to the electronic limited-slip differential using a torque value calibration unit based on the total number of pulses in the load spectrum; and simultaneously determining the durability of the electronic limited-slip differential based on the final loading torque values ​​and loading count.

2. The torsional durability test method for an electronic limited-slip differential according to claim 1, characterized in that, The step of calculating the total number of load spectrum pulses based on the loading torque waveform using the pulse count calculation unit includes: when a loading torque waveform suitable for the electronic limited-slip differential is determined in real time, determining the load spectrum of the electronic limited-slip differential based on the loading torque waveform; determining the maximum forward torque, maximum reverse torque, total forward torque over the entire lifespan, and total reverse torque over the entire lifespan of the electronic limited-slip differential based on the load spectrum, and simultaneously calculating the number of forward and reverse pulses using a first preset algorithm; and integrating the number of forward and reverse pulses to generate the total number of load spectrum pulses.

3. The torsional durability test method for an electronic limited-slip differential according to claim 2, characterized in that, The expression for the first preset algorithm is: forward pulse count = total sum of forward torque over the entire lifespan ÷ maximum forward torque; reverse pulse count = total sum of reverse torque over the entire lifespan ÷ maximum reverse torque.

4. The torsional durability test method for an electronic limited-slip differential according to claim 1, characterized in that, The step of determining the final loading positive and negative torque values ​​and loading counts adapted to the electronic limited-slip differential by the torque value calibration unit based on the total number of pulses in the load spectrum includes: generating a corresponding torque change curve by the torque value calibration unit based on the total number of pulses in the load spectrum; detecting the maximum positive and negative torques corresponding to the electronic limited-slip differential based on the torque change curves; and simultaneously calculating the final loading positive and negative torque values ​​by combining the second preset algorithm.

5. The torsional durability test method for an electronic limited-slip differential according to claim 4, characterized in that, The expression for the second preset algorithm is: Final loading positive and negative torque value = maximum positive and negative torque × safety factor, where the safety factor is set according to the torque control accuracy of the electronic limited-slip differential.

6. The torsional durability test method for an electronic limited-slip differential according to claim 1, characterized in that, The loaded torque waveform includes sine wave, half-sine wave, triangular wave and trapezoidal wave.

7. The torsional durability test method for an electronic limited-slip differential according to claim 1, characterized in that, The product design parameters include maximum forward torque, maximum reverse torque, number of torque loading cycles throughout the product's lifespan, and the distribution pattern of the loaded torque.

8. A torsional durability testing system for an electronic limited-slip differential, characterized in that, The system includes: a data acquisition module for acquiring product design parameters of the electronic limited-slip differential; a matching module for performing a torsional test on the electronic limited-slip differential using a preset testing device based on the product design parameters, to acquire corresponding peak torque and pulse frequency, and simultaneously matching a loading torque waveform adapted to the actual operating conditions of the electronic limited-slip differential based on the peak torque and pulse frequency; a calculation module for calculating the total number of pulses of the load spectrum based on the loading torque waveform using a pulse count calculation unit; and a processing module for determining the final loading torque values ​​and loading count adapted to the electronic limited-slip differential based on the total number of pulses of the load spectrum using a torque value calibration unit, and simultaneously determining the durability of the electronic limited-slip differential based on the final loading torque values ​​and loading count.

9. A computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the electronic limited-slip differential torsional durability test method as described in any one of claims 1 to 7.

10. A readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the torsional durability test method for electronic limited-slip differentials as described in any one of claims 1 to 7.

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