A method and system for testing dynamic angular displacement of a clutch torsional damper

Abstract

The application provides a kind of clutch torsional damper dynamic angular displacement test method and system, the method is: install flywheel speed sensor and transmission input shaft speed sensor;Start parking brake, make transmission handle be in idle gear and clutch pedal step down, engine ignition and idling operation smoothly;Obtain the limit angle of pre-damping stage under different working conditions, and the engine flywheel speed obtained by flywheel speed sensor and the transmission input shaft speed obtained by input shaft speed sensor;Dynamic angular displacement is calculated by engine flywheel speed and transmission input shaft speed;According to the limit angle of pre-damping stage under different working conditions and dynamic angular displacement, the dynamic angular displacement of torsional damper under different working conditions is calculated.Based on the method, a kind of clutch torsional damper dynamic angular displacement test system is also proposed.The speed signal and operation process under the condition of the whole vehicle are collected, and the test result is used for mechanism research and avoidance design of vibration and noise problem.

Description

Technical Field

[0001] This invention belongs to the field of vehicle technology, and specifically relates to a method and system for testing the dynamic angular displacement of a clutch torsional damper. Background Technology

[0002] The automotive clutch is located within the flywheel housing between the engine and the transmission. The clutch assembly is secured to the rear surface of the flywheel with screws, and the clutch's output shaft is the transmission's input shaft. During vehicle operation, the driver can depress or release the clutch pedal as needed to temporarily separate and gradually engage the engine and transmission, cutting off or transmitting power from the engine to the transmission. The torsional damper is a crucial component of the automotive clutch. Its torsional characteristics represent the relationship between the torque transmitted by the clutch and the torsional damper's angular displacement. It is a static testing method that includes a pre-damping stage and a main damping stage.

[0003] If the dynamic angular displacement of the torsional damper reciprocates between pre-damping and main damping, vibration and noise problems such as idle gear knocking and torsional resonance are likely to occur. Due to limitations in installation space and operating characteristics, it is not convenient to directly test the dynamic angular displacement of the torsional damper in the vehicle state. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a test method and system for the dynamic angular displacement of a clutch torsional damper. By acquiring the speed signal and operating procedure under the condition of the whole vehicle, the test results can be used for mechanism analysis and avoidance design of vibration and noise problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for testing the dynamic angular displacement of a clutch torsional damper includes the following steps:

[0007] Install the flywheel speed sensor and the transmission input shaft speed sensor; activate the parking brake, put the transmission lever in neutral and depress the clutch pedal, start the engine and allow it to idle smoothly.

[0008] The limit angles of the pre-damping stage under different working conditions are obtained, as well as the engine flywheel speed obtained by the flywheel speed sensor and the transmission input shaft speed obtained by the input shaft speed sensor; the dynamic angular displacement is calculated by the engine flywheel speed and the transmission input shaft speed.

[0009] Based on the limit angle and dynamic angular displacement of the pre-damping stage under different working conditions, the dynamic angular displacement of the torsional damper under different working conditions is calculated.

[0010] Furthermore, the flywheel speed sensor is mounted on the outer ring of the engine flywheel.

[0011] Furthermore, the transmission input shaft speed sensor is mounted on the outer ring of the transmission input shaft.

[0012] Furthermore, the process of calculating the dynamic angular displacement using the engine flywheel speed and the transmission input shaft rotation includes:

[0013] The engine flywheel speed ω 飞轮 and the input shaft speed ω of the transmission 输入轴 Subtracting the values ​​and integrating the speed difference yields the dynamic angular displacement.

[0014]

[0015] Furthermore, based on the limiting angle and dynamic angular displacement of the pre-damping stage under different working conditions, the process of calculating the dynamic angular displacement of the torsional damper under different working conditions includes:

[0016] Extracting the dynamic angular displacement during the integral reference time period And calculate the average peak value of the dynamic angular displacement.

[0017]

[0018] Based on the limiting angle of the pre-damping stage The dynamic angular displacement θ of the torsional damper is obtained. Δ ,

[0019]

[0020] Furthermore, the different operating conditions include: idling, creeping, and full throttle acceleration.

[0021] Furthermore, the process performed under idling conditions specifically includes:

[0022] After the engine is ignited and running smoothly at idle, release the clutch pedal and accelerator pedal to engage the clutch and obtain the limit angle of the pre-damping phase under idle conditions.

[0023] Return the gear lever to neutral, continue collecting data on engine flywheel speed and gearbox input shaft preset time under idle conditions, and then end the data collection.

[0024] Furthermore, the process executed under the creeping condition specifically includes:

[0025] Engage the parking brake, put the transmission in neutral, depress the clutch pedal to fully disengage the clutch, start the engine and run it smoothly.

[0026] After releasing the parking brake and allowing the vehicle to creep smoothly in gear, obtain the limit angle of the pre-damping stage under creep conditions.

[0027] Return the gear lever to neutral and continue collecting data on the engine flywheel speed and the preset time of the gearbox input shaft under creeping conditions, then end the data collection.

[0028] Furthermore, the process executed under full throttle acceleration specifically includes:

[0029] Engage the parking brake, put the transmission in neutral, depress the clutch pedal to fully disengage the clutch, start the engine and run it smoothly.

[0030] Release the parking brake to keep the engine speed at the specified speed in any gear and obtain the limit angle of the pre-damping stage under full throttle acceleration.

[0031] Return the gear lever to neutral and continue collecting data on the engine flywheel speed and the gearbox input shaft for a preset time under full throttle acceleration conditions, then end the data collection.

[0032] The present invention also proposes a test system for dynamic angular displacement of a clutch torsional damper, including a preprocessing module, a first calculation module and a second calculation module;

[0033] The preprocessing module is used to install the flywheel speed sensor and the transmission input shaft speed sensor; activate the parking brake, put the transmission lever in neutral and depress the clutch pedal, start the engine and run smoothly at idle speed;

[0034] The first calculation module is used to obtain the limit angle of the pre-damping stage under different working conditions, as well as the engine flywheel speed obtained by the flywheel speed sensor and the transmission input shaft speed obtained by the input shaft speed sensor; and to calculate the dynamic angular displacement by using the engine flywheel speed and the transmission input shaft speed.

[0035] The second calculation module is used to calculate the dynamic angular displacement of the torsional damper under different working conditions based on the limit angle and dynamic angular displacement of the pre-damping stage under different working conditions.

[0036] The effects described in the invention are merely those of the embodiments, and not all the effects of the invention. One of the above technical solutions has the following advantages or beneficial effects:

[0037] This invention proposes a testing method and system for the dynamic angular displacement of a clutch torsional vibration damper. The method includes the following steps: installing a flywheel speed sensor and a transmission input shaft speed sensor; activating the parking brake, placing the transmission lever in neutral and depressing the clutch pedal, igniting the engine and allowing it to idle smoothly; acquiring the limit angles of the pre-damping stage under different operating conditions, as well as the engine flywheel speed acquired by the flywheel speed sensor and the transmission input shaft speed acquired by the input shaft speed sensor; calculating the dynamic angular displacement using the engine flywheel speed and transmission input shaft speed; and calculating the dynamic angular displacement of the torsional vibration damper under different operating conditions based on the limit angles and dynamic angular displacements of the pre-damping stage. Based on this testing method for the dynamic angular displacement of a clutch torsional vibration damper, a testing system for the dynamic angular displacement of a clutch torsional vibration damper is also proposed. By collecting speed signals and operating procedures under vehicle conditions, the test results can be used for mechanism analysis and mitigation design of vibration and noise problems. Attached Figure Description

[0038] Figure 1 This is a flowchart of a method for testing the dynamic angular displacement of a clutch torsional damper according to Embodiment 1 of the present invention;

[0039] Figure 2 This is a schematic diagram of the clutch torsional vibration damper and operating mechanism proposed in Embodiment 1 of the present invention;

[0040] Figure 3 This is a schematic diagram of the dynamic angular displacement of a torsional damper under the reference criterion proposed in Embodiment 1 of the present invention;

[0041] Figure 4 This is a schematic diagram of a dynamic angular displacement testing system for a clutch torsional damper proposed in Embodiment 1 of the present invention;

[0042] Legend:

[0043] 1-Engine; 2-Flywheel; 3-1-Flywheel speed sensor; 3-2-Transmission input shaft speed sensor; 4-Transmission input shaft; 5-Transmission lever; 6-Parking brake; 7-Torque damper; 8-Accelerator pedal; 9-Brake pedal; 10-Clutch pedal. Detailed Implementation

[0044] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure of the invention, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components, processing techniques, and processes are omitted in this invention to avoid unnecessarily limiting the invention.

[0045] Example 1

[0046] Embodiment 1 of the present invention proposes a test method for the dynamic angular displacement of a clutch torsional damper, which solves the technical problem in the prior art that the dynamic angular displacement of the torsional damper is not convenient to be directly tested in the whole vehicle state due to the limitations of installation space and working characteristics.

[0047] The testing method specifically includes: installing speed sensors on the test vehicle, primarily measuring the speed signals from the engine flywheel and transmission input shaft, and ensuring the signals are functioning correctly. Following test specifications for different operating conditions, the operation procedures for the clutch pedal, transmission lever, parking brake, and accelerator pedal are completed. The test data is processed, and the dynamic angular displacement of the torsional damper is calculated.

[0048] Figure 1 This is a flowchart of a method for testing the dynamic angular displacement of a clutch torsional damper according to Embodiment 1 of the present invention;

[0049] In step S100, the flywheel speed sensor and the transmission input shaft speed sensor are installed; the parking brake is activated, the transmission lever is in neutral and the clutch pedal is depressed, the engine is started and idles smoothly;

[0050] Figure 2 This is a schematic diagram of the clutch torsional vibration damper and operating mechanism proposed in Embodiment 1 of the present invention;

[0051] Install the engine flywheel speed sensor on the vehicle body, and install the input shaft speed sensor on the transmission input shaft, adjust and ensure the signal is normal. Flywheel speed sensor 3-1 is installed on the outer ring of the engine flywheel 2. Transmission input shaft speed sensor 3-2 is installed on the outer ring of the transmission input shaft 4.

[0052] The tester activated the parking brake (6), put the transmission in neutral, pressed the clutch pedal (10) to fully disengage the clutch, and started the engine, which ran smoothly.

[0053] In step S200, the limit angles of the pre-damping stage under different working conditions are obtained, as well as the engine flywheel speed obtained by flywheel speed sensor 3-1 and the transmission input shaft speed obtained by input shaft speed sensor 3-2; the dynamic angular displacement is calculated by the engine flywheel speed and the transmission input shaft speed.

[0054] In this application, the different operating conditions include: idling, creeping, and full-throttle acceleration.

[0055] The process performed under idling conditions specifically includes:

[0056] After the engine 1 is ignited and idles smoothly, release the clutch pedal 10 and the accelerator pedal 8 to engage the clutch and obtain the limit angle of the pre-damping stage under idle conditions; that is, start the peripheral processing module and start collecting data. After collecting data for 10 seconds, quickly push the gear lever 5 from neutral to first gear until it can no longer be pushed and maintain this position for 10 seconds. At this time, the dynamic angular displacement of the torsional damper 7 is equal to the limit angle of the pre-damping stage, which is used as the integral reference for subsequent data processing.

[0057] Return the gear lever 5 to neutral, continue collecting data on the engine flywheel speed and the gearbox input shaft for a preset time while idling, then stop data collection. Continue for another 10 seconds before stopping data collection.

[0058] The process executed under creep mode specifically includes:

[0059] Engage the parking brake 6, put the transmission in neutral, depress the clutch pedal 10 to fully disengage the clutch, start the engine 1 and run it smoothly.

[0060] Release the parking brake 6 to allow the vehicle to creep smoothly in gear, then obtain the limit angle during the pre-damping phase of the creeping condition; that is, start the test equipment and begin data acquisition. After 10 seconds of data acquisition, return the gear lever 5 to neutral, and press the brake pedal 9 to stop the vehicle, then activate the parking brake.

[0061] Quickly push the gear lever 5 from neutral to first gear until it can no longer be pushed and hold for 10 seconds. At this time, the dynamic angular displacement of the torsional damper 7 is equal to the limit angle of the pre-damping stage, which is used as the integral reference for subsequent data processing.

[0062] Return the gear lever 5 to neutral, continue collecting data on the engine flywheel speed and the preset time of the gearbox input shaft under creeping conditions, then stop data collection. Continue for another 10 seconds before stopping data collection.

[0063] The specific process performed under full throttle acceleration includes:

[0064] Engage the parking brake 6, put the transmission in neutral, depress the clutch pedal 10 to fully disengage the clutch, start the engine 1 and run it smoothly.

[0065] Release the parking brake 6, allowing the vehicle to maintain the engine speed at the specified RPM in any gear. Start the test equipment and begin data collection. After 5 seconds of data collection, fully depress the accelerator pedal 8 to accelerate the vehicle to the specified engine RPM.

[0066] Return the gear lever 5 to neutral and press the brake pedal 9 to stop the vehicle, then engage the parking brake.

[0067] Quickly push the gear lever 5 from neutral to first gear until it can no longer be pushed and hold for 10 seconds. At this time, the dynamic angular displacement of the torsional damper 7 is equal to the limit angle of the pre-damping stage, which is used as the integral reference for subsequent data processing.

[0068] Then return the gear lever 5 to neutral and continue for 10 seconds before ending the data acquisition.

[0069] Return the gear lever to neutral and continue collecting data on the engine flywheel speed and gearbox input shaft speed under full throttle acceleration for a preset time. Then, continue collecting data for another 10 seconds before ending the data collection process.

[0070] The process of calculating dynamic angular displacement using engine flywheel speed and transmission input shaft rotation includes:

[0071] The engine flywheel speed ω 飞轮 and the input shaft speed ω of the transmission 输入轴 Subtracting the values ​​and integrating the speed difference yields the dynamic angular displacement.

[0072]

[0073] The scope of protection of this invention is not limited to the time periods listed in Example 1, and those skilled in the art can choose according to the actual situation.

[0074] In step S300, the dynamic angular displacement of the torsional damper under different working conditions is calculated based on the limit angle and dynamic angular displacement of the pre-damping stage under different working conditions.

[0075] The process of calculating the dynamic angular displacement of the torsional damper under different working conditions, based on the limiting angle and dynamic angular displacement of the pre-damping stage, includes:

[0076] Extracting the dynamic angular displacement during the integral reference time period And calculate the average peak value of the dynamic angular displacement.

[0077]

[0078] Based on the limiting angle of the pre-damping stage The dynamic angular displacement θ of the torsional damper is obtained. Δ ,

[0079]

[0080] Figure 3 (a) is a schematic diagram of the dynamic angular displacement of the torsional damper under the first benchmark criterion proposed in Embodiment 1 of the present invention; Figure 3 (b) is a schematic diagram of the dynamic angular displacement of the torsional damper under the second benchmark criterion proposed in Embodiment 1 of the present invention.

[0081] The scope of protection of this invention is not limited to the results listed in Example 1. Those skilled in the art can obtain different result data according to the actual situation.

[0082] The present invention provides a test method for dynamic angular displacement of clutch torsional damper. By collecting the speed signal and operation process under the condition of the whole vehicle, the test results can be used for mechanism analysis and avoidance design of vibration and noise problems.

[0083] Example 2

[0084] Based on the method for testing the dynamic angular displacement of a clutch torsional damper proposed in Embodiment 1 of the present invention, and the system for testing the dynamic angular displacement of a clutch torsional damper proposed in Embodiment 2 of the present invention, Figure 3 This is a schematic diagram of the dynamic angular displacement of a torsional damper under the benchmark criterion proposed in Embodiment 1 of the present invention; the system includes: a preprocessing module, a first calculation module, and a second calculation module;

[0085] The preprocessing module is used to install the flywheel speed sensor and the transmission input shaft speed sensor; activate the parking brake, put the transmission lever in neutral and depress the clutch pedal, start the engine and run smoothly at idle speed;

[0086] The first calculation module is used to obtain the limit angle of the pre-damping stage under different working conditions, as well as the engine flywheel speed obtained by the flywheel speed sensor and the transmission input shaft speed obtained by the input shaft speed sensor; the dynamic angular displacement is calculated by the engine flywheel speed and the transmission input shaft speed.

[0087] The second calculation module is used to calculate the dynamic angular displacement of the torsional damper under different working conditions based on the limit angle and dynamic angular displacement of the pre-damping stage under different working conditions.

[0088] In the preprocessing module: A flywheel speed sensor for the engine flywheel is installed on the vehicle, and an input shaft speed sensor is installed on the transmission input shaft. The sensor is tested and the signal is ensured to be normal. Flywheel speed sensor 3-1 is installed on the outer ring of the engine flywheel 2. Transmission input shaft speed sensor 3-2 is installed on the outer ring of the transmission input shaft 4.

[0089] The tester activated the parking brake (6), put the transmission in neutral, pressed the clutch pedal (10) to fully disengage the clutch, and started the engine, which ran smoothly.

[0090] In the first calculation module, different operating conditions include: idling, creeping, and full throttle acceleration.

[0091] The process performed under idling conditions specifically includes:

[0092] After the engine 1 is ignited and idles smoothly, release the clutch pedal 10 and the accelerator pedal 8 to engage the clutch and obtain the limit angle of the pre-damping stage under idle conditions; that is, start the peripheral processing module and start collecting data. After collecting data for 10 seconds, quickly push the gear lever 5 from neutral to first gear until it can no longer be pushed and maintain this position for 10 seconds. At this time, the dynamic angular displacement of the torsional damper 7 is equal to the limit angle of the pre-damping stage, which is used as the integral reference for subsequent data processing.

[0093] Return the gear lever 5 to neutral, continue collecting data on the engine flywheel speed and the gearbox input shaft for a preset time while idling, then stop data collection. Continue for another 10 seconds before stopping data collection.

[0094] The process executed under creep mode specifically includes:

[0095] Engage the parking brake 6, put the transmission in neutral, depress the clutch pedal 10 to fully disengage the clutch, start the engine 1 and run it smoothly.

[0096] Release the parking brake 6 to allow the vehicle to creep smoothly in gear, then obtain the limit angle during the pre-damping phase of the creeping condition; that is, start the test equipment and begin data acquisition. After 10 seconds of data acquisition, return the gear lever 5 to neutral, and press the brake pedal 9 to stop the vehicle, then activate the parking brake.

[0097] Quickly push the gear lever 5 from neutral to first gear until it can no longer be pushed and hold for 10 seconds. At this time, the dynamic angular displacement of the torsional damper 7 is equal to the limit angle of the pre-damping stage, which is used as the integral reference for subsequent data processing.

[0098] Return the gear lever 5 to neutral, continue collecting data on the engine flywheel speed and the preset time of the gearbox input shaft under creeping conditions, then stop data collection. Continue for another 10 seconds before stopping data collection.

[0099] The specific process performed under full throttle acceleration includes:

[0100] Engage the parking brake 6, put the transmission in neutral, depress the clutch pedal 10 to fully disengage the clutch, start the engine 1 and run it smoothly.

[0101] Release the parking brake 6, allowing the vehicle to maintain the engine speed at the specified RPM in any gear. Start the test equipment and begin data collection. After 5 seconds of data collection, fully depress the accelerator pedal 8 to accelerate the vehicle to the specified engine RPM.

[0102] Return the gear lever 5 to neutral and press the brake pedal 9 to stop the vehicle, then engage the parking brake.

[0103] Quickly push the gear lever 5 from neutral to first gear until it can no longer be pushed and hold for 10 seconds. At this time, the dynamic angular displacement of the torsional damper 7 is equal to the limit angle of the pre-damping stage, which is used as the integral reference for subsequent data processing.

[0104] Then return the gear lever 5 to neutral and continue for 10 seconds before ending the data acquisition.

[0105] Return the gear lever to neutral and continue collecting data on the engine flywheel speed and gearbox input shaft speed under full throttle acceleration for a preset time. Then, continue collecting data for another 10 seconds before ending the data collection process.

[0106] The process of calculating dynamic angular displacement using engine flywheel speed and transmission input shaft rotation includes:

[0107] The engine flywheel speed ω 飞轮 and the input shaft speed ω of the transmission 输入轴 Subtracting the values ​​and integrating the speed difference yields the dynamic angular displacement.

[0108]

[0109] The scope of protection of this invention is not limited to the time periods listed in Example 2, and those skilled in the art can choose according to the actual situation.

[0110] In the second calculation module, the process of calculating the dynamic angular displacement of the torsional damper under different working conditions, based on the limit angle and dynamic angular displacement of the pre-damping stage, includes:

[0111] Extracting the dynamic angular displacement during the integral reference time period And calculate the average peak value of the dynamic angular displacement.

[0112] Based on the limiting angle of the pre-damping stage The dynamic angular displacement θ of the torsional damper is obtained. Δ ,

[0113]

[0114] The present invention provides a test system for dynamic angular displacement of clutch torsional damper. By collecting the speed signal and operation process under the condition of the whole vehicle, the test results can be used for mechanism analysis and avoidance design of vibration and noise problems.

[0115] The description of the relevant parts of the test system for dynamic angular displacement of a clutch torsional damper provided in Embodiment 2 of this application can be found in the detailed description of the corresponding parts in the test method for dynamic angular displacement of a clutch torsional damper provided in Embodiment 1 of this application, and will not be repeated here.

[0116] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that the elements inherent in a process, method, article, or apparatus that includes a list of elements are included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, portions of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.

[0117] While specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art can make other modifications or variations based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method of testing dynamic angular displacement of a clutch torsional damper, characterized by, Includes the following steps: Install the flywheel speed sensor and the transmission input shaft speed sensor; activate the parking brake, put the transmission lever in neutral and depress the clutch pedal, start the engine and allow it to idle smoothly; the flywheel speed sensor is installed on the outer ring of the engine flywheel; the transmission input shaft speed sensor is installed on the outer ring of the transmission input shaft; The limit angle of the pre-damping stage under different working conditions is obtained, as well as the engine flywheel speed obtained by the flywheel speed sensor and the transmission input shaft speed obtained by the transmission input shaft speed sensor; The dynamic angular displacement is calculated using the engine flywheel speed and the transmission input shaft speed. The process of calculating the dynamic angular displacement using the engine flywheel speed and the transmission input shaft speed includes: calculating the engine flywheel speed... and transmission input shaft speed Subtracting the values ​​and integrating the speed difference yields the dynamic angular displacement. , ； Based on the limiting angle and dynamic angular displacement of the pre-damping stage under different working conditions, the dynamic angular displacement of the torsional damper under different working conditions is calculated. The specific process is as follows: extract the dynamic angular displacement during the integral reference time period. And calculate the average peak value of the dynamic angular displacement. , ； Based on the limiting angle of the pre-damping stage The dynamic angular displacement of the torsional damper is obtained. , 。 2. The method for testing the dynamic angular displacement of a clutch torsional damper according to claim 1, characterized in that, The different operating conditions include: idling, creeping, and full throttle acceleration.

3. The method for testing the dynamic angular displacement of a clutch torsional vibration damper according to claim 2, characterized in that, The process performed under idling conditions specifically includes: After the engine is ignited and running smoothly at idle, release the clutch pedal and accelerator pedal to engage the clutch and obtain the limit angle of the pre-damping phase under idle conditions. Return the gear lever to neutral, continue collecting data on engine flywheel speed and gearbox input shaft preset time under idle conditions, and then end the data collection.

4. The method for testing the dynamic angular displacement of a clutch torsional damper according to claim 2, characterized in that, The process executed under the creeping condition specifically includes: Engage the parking brake, put the transmission in neutral, depress the clutch pedal to fully disengage the clutch, start the engine and run it smoothly. After releasing the parking brake and allowing the vehicle to creep smoothly in gear, obtain the limit angle of the pre-damping stage under creep conditions. Return the gear lever to neutral and continue collecting data on the engine flywheel speed and the preset time of the gearbox input shaft under creeping conditions, then end the data collection.

5. The method for testing the dynamic angular displacement of a clutch torsional vibration damper according to claim 2, characterized in that, The process executed under full throttle acceleration specifically includes: Engage the parking brake, put the transmission in neutral, depress the clutch pedal to fully disengage the clutch, start the engine and run it smoothly. Release the parking brake to keep the engine speed at the specified speed in any gear and obtain the limit angle of the pre-damping stage under full throttle acceleration. Return the gear lever to neutral and continue collecting data on the engine flywheel speed and the gearbox input shaft for a preset time under full throttle acceleration conditions, then end the data collection.

6. A testing system for the dynamic angular displacement of a clutch torsional damper, used to perform the testing method for the dynamic angular displacement of a clutch torsional damper as described in any one of claims 1 to 5, characterized in that, It includes a preprocessing module, a first calculation module, and a second calculation module; The preprocessing module is used to install the flywheel speed sensor and the transmission input shaft speed sensor; Engage the parking brake, put the gear lever in neutral and depress the clutch pedal, start the engine and allow it to idle smoothly. The first calculation module is used to obtain the limit angle of the pre-damping stage under different working conditions, as well as the engine flywheel speed obtained by the flywheel speed sensor and the transmission input shaft speed obtained by the transmission input shaft speed sensor; and to calculate the dynamic angular displacement by using the engine flywheel speed and the transmission input shaft speed. The second calculation module is used to calculate the dynamic angular displacement of the torsional damper under different working conditions based on the limit angle and dynamic angular displacement of the pre-damping stage under different working conditions.

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