Modeling and performance simulation of transmission system for car equipped with metal pushing V-belt type CVT

To accomplish the demand of minimum fuel consumption and good power performance for continuously variable transmission (CVT) car. Aiming at the whole vehicle model including the engine, the clutch and the CVT, the dynamics mathematical model of CVT system is established according to different stages of clutch engaging, that the dynamic integrated simulation model is developed. A parameter self-adjusting speed ratio fuzzy controller is devised and the typical operation states of the car are simulated and the results are analyzed in detail. The simulation results indicate that the speed ratio fuzzy controller has good control effect compared with the conventional PD controller. The running tests of whole vehicle verify further that the simulation model established is correct and the control arithmetic about speed ratio is feasible and effective.