The New Vehicle Control And Simulation Of The Power Split Electronically Controlled Continuously Variable Transmission System

A new vehicle power split continuously variable transmission system (PSCVT) is presented in this paper. The system consists of a variable pulley set, a planetary train, two electromagnetic clutches, a electromagnetic brake etc. electromagnetic clutches and brake are controlled by ECU. The system can be applied in minicar or economic car. Kinetic , power flow and transmission efficiency are analyzed. Considering the high order nonelinearly and mutiple-input-mutiple-output coupling effect of the system, different driving condition and complex external disturbance, hybrid fuzzy-PID control with parameters selfturning is adopted in engine speed control system, the simulation which is integrated with vehicle model in the Matlab environment shows that the performance and fuel economy of the car with PSCVT is better than those of car with the standard manually shifted transmission. The results of simulation show that the fuzzy control strategy in this paper is effective and feasible with good practicability. In addition, electronic control unit of the PSCVT system is designed.