| Transmission is an important assembly engine in the car, many technical and performance of the car is directly related with the transmission performance, such as economy, dynamic, maneuverability, driving safety, comfort, and the using life of many parts. At present, we fall far behind foreign in the transmission test and assembly test. There is no complete set of the automatic transmission and continuously variable transmission test standard in China currently. Lacking of advanced test specification, lead the development of our country in the transmission studies in a backward position, and there is a large gap in the requirements that China preparing to develop CVT automatic transmission vigorously, In this paper, based on the analysis of EMCVT mechanical structure, a comprehensive test formula is put forward which is adjust to our domestic situation after a comparative analysis on the international automatic transmission test standard, in order to provide a reference for our country. In this thesis, mainly work is carried out as follows:(1) Study the mechanical structure of EMCVT and familiar with the control parameters and control process of TCU.(2) Under the condition that there is no automatic transmission test standard in domestic, the traditional mechanical variable speed device testing standards and foreign standards of the company’s automatic transmission is studied, and assessment tasks and evaluation is put forward.(3) Comprehensive performance bench and loading test program of EMCVT are discussed, and a set of comprehensive performance test and loading test is designed.(4) On the basis of test formula, no-load test stand and the overall performance bench are designed, which assess transmission reliability and evaluate the performance of transmission. (5) After the test equipment is set up, according to test formula, the related functions test and reliability test are carried out, and the test results are analyzed to make sure that the transmission is suitable for loading. |
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