Taking the performances of power, fuel economy and emission as optimization goals, the simulation models of statics, kinematics and dynamics of a pickup vehicle were built by using GT-Drive software. On this basis, the engine power selection and matching optimization were conducted by adopting the models. The results showed that the pickup vehicle had the best power perform- ance and the lowest fuel consumption per 100km when it was assembled with T20 engine among three optional engines. The original e- mission of all three engines can't meet ...