Dynamic simulation of clutch engagement process based on dynamic friction coefficient of microautomobile

LI Lifu, SUN Lichang

(School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China)

Abstract: Aiming at the problem of a strong jerk on the initial moment of the commonly used AMT starting control strategy for the change of dynamic friction coefficient was ignored, the starting process of minicar AMT was investigated. A method of the dynamic simulation at clutch engagement process of minicar based on dynamic friction coefficient was presented. According to the principle of tribology and its test, the dynamic friction coefficient of the clutch was discussed. The threedimensional solid model of the clutch was established, and the dynamic simulation of clutch engagement process was carried out with ADAMS software. The relationship between the dynamic friction coefficient of the clutch with the friction torque and jerk was analyzed. The results indicate that compared with the clutch with constant dynamic friction coefficient, the jerk of the clutch halfjoint and the synchronous point with the dynamic friction coefficient was larger. Among them, the increase rate of the jerk of the halfjoint was 110%, which verified the importance of the dynamic friction coefficient on the initial jerk of the vehicle.

Key words: clutch; dynamic friction coefficient; jerk; dynamic simulation