The intake lag angle of the engine is optimized, and the dynamic effects of intake pipes and exhaust pipes to the improvement of motorcycle engine is applied to make the engine test performance curve approach the simulation curve.

• 本文介绍了从进气晚关角及进排气的动态效应几方面着手，不断改进发动机的配气相位以及进排气系统，使发动机的实际性能曲线逐步接近计算机仿真曲线。