Wet clutch sliding friction endurance test method

Abstract

The invention discloses a wet clutch sliding friction endurance test method comprising the steps: a test bench is set, firstly testing is carried out to obtain a curve of friction energy related parameters, then a friction energy infinitesimal element is calculated, and the friction energy of single sliding friction through integration is obtained; and friction energy per unit area is used as a matching target, in the test process, the combination state of a wet clutch is monitored through single friction energy by means of friction energy related parameters monitored in real time, and when the friction energy per unit area exceeds a target value range, a test bed automatically stops and prompts to analyze test process data. The combination state of the wet clutch is monitored through thesingle friction energy, and when the target friction energy is out of tolerance and the clutch does not reach the preset combination state, the system automatically stops, so that the test device is prevented from testing in a non-preset combination state of the clutch, and the stability of the single friction energy is ensured.

Description

technical field [0001] The invention belongs to the field of clutch durability tests, in particular to a wet clutch sliding friction durability test method. Background technique [0002] The slippery friction durability test of the wet clutch is to simulate the combination process of the wet clutch on the whole vehicle through the slippery friction of the clutch, so as to evaluate the durability of the clutch. In the durability test, the wet clutch needs to be repeatedly engaged and disconnected. At present, there is no method for monitoring the engagement state of the wet clutch during the test, and it is difficult to evaluate the durability of the wet clutch. [0003] The Chinese patent "A Test Method and Test Bench for Wear Amount of Wet Clutch Friction Plate" (publication number CN105021483A, publication date 2015.11.04) discloses a test method and test bench for wear amount of wet clutch friction plate. The method can test the wear amount of the friction plate to evalu...

AI Technical Summary

Problems solved by technology

It is not possible to test the amount of wear on the clutch after each engagement, so it is not possible to evaluate the state of the clutch on a single engagement

[0007] 3. Since the above scheme cannot detect the amount of wear in the middle of the test, there is a situation where the total friction amount meets the requirements of the set range, but the single wear amount is discretely distributed, and the accuracy of the test is poor

[0008] 4. The number of wet clutch durability tests is as high as hundreds of thousands of times. Technology 1 needs to disassemble and test the clutch every 800 times. During the test period, it needs to be disassembled and tested repeatedly. The test efficiency is low, and the number of samples is increased during repeated disassembly. Failure rate

[0009] 5. The above scheme cannot protect the samples during the test, and there is a risk that the test bench will not stop after the wet clutch fails during the test

[0012] 1. Only the temperature during the test is monitored. When other parameters change transiently during the test, the bench cannot monitor and cannot monitor the coupling state of the clutch in real time.

[0013] 2. The protection parameters are not set, and there is a risk of clutch ablation during the test

[0017] In addition, due to the long duration of the endurance test, if equipment or other problems occur during the test, and the test bench has no reliable protection measures, the clutch may generate abnormal friction and high temperature, which may lead to ablation of the clutch and damage to the sample in severe cases , so that all previous tests are scrapped

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