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 考慮到車輛系統的高階非線性和輸入輸出的耦合效應及汽車運行的復雜工況和外界環境干擾等因素的影響,提出了混合模糊? pid控制算法用于變速系統速比的控制,并結合整車的數學模型在matlab下進行了計算機的動態仿真。