Research On Mechanical Transmission (MT) Load Testing Technology Of Passenger Vehicle

Transmission is one of the key parts of automobile driving system. Its main function is to change torque and rotational speed from engine and to meet the requirements of tractive force. Therefore, its working conditions will have a direct impact on the overall performance of the car, and it is important to have a test for transmission. Based on analyzing lots of specialized books and literature data, and referring to the application results of automobile transmission test, the overall program of mechanical transmission (MT) test bench is designed, and its loading technology is researched.Firstly, the meaning and the development of transmission test are introduced in the paper. Secondly, the construction, working principle and working condition of the passenger vehicle MT are analyzed and the structure characteristics of the tested transmission is introduced.By discussing the general test specification of MT, test specification of the tested MT was determined. Thirdly, by analyzing the MT performance test program, a electric-closed structure program of MT loading test bench is established. Finally,the load testing system of the MT is conducted in-depth studies, and a load model is established. Vehicles typical moving conditions is simulated on the test bed, and the transmission can be realized in full capacity loading test.The result shows that the program is feasible, handling of the technical route is also reasonable and suitable, and the tested parts can be loaded accurately and reliably.