工程车辆四参数换档规律仿真研究

Four-parameter shift schedule for automatic transmission were proposed on the base of Three-parameter shift schedule from the point of view of saving energy. In order to verify this shift schedule, a simulation program using a software package of Matlab/Simulink was developed. The simulation results show that the shift schedule is correct. This shift schedule has enriched the theory of vehicle automatic maneuvering and will improve the efficiency of hydrodynamic drive system of the vehicle.