关键词: 变速器；故障诊断；台架耐久试验；疲劳

Abstract: Some parts may have early failure during the bench durability test, resulting in test failure, and the associated parts also have the risk of secondary damage. In order to reduce the cost of R&D and test, the test instrument specially used for powertrain system in the development stage can monitor the change of test data in the test process, quickly identify the abnormal points in the initial stage of transmission assembly failure, and accurately determine the specific location of failure through data analysis, so as to ensure that the transmission assembly will not be damaged due to fatigue failure of individual parts machine failure. The results show that: with the help of auxiliary equipment, monitoring and analyzing the data transformation in the test process, the fault can be found early, and the failure parts can be accurately predicted, then the decision can be made quickly, a lot of test costs can be saved and the verification cycle can be shortened.

Key words: Transmission; Fault diagnosis; Bench durability test; Fatigue