发动机气门与活塞间隙动态仿真分析

Dynamic Simulation Analysis of Engine Valve and Piston Clearance

文章基于Proe软件对双顶置式发动机的气门与活塞运动系统建立了多体运动学仿真模型,并完成运动仿真。通过拟合运动仿真数据得到气门与活塞在运动过程中的相对位置曲线,从而得到发动机气门与活塞之间实时动态间隙,研究结论对合理选择活塞顶气门凹坑深度、减小余隙容积、提高燃烧效率具有重要的参考意义。

Based on the Proe software, a multi-body kinematics simulation model and a motion simulation were established for the valve and piston motion system of a double-overhead engine. By fitting the kinematic simulation data, the relative position curve of the valve and the piston during the movement can be obtained, so as to obtain the real-time dynamic clearance between the engine valve and the piston. The conclusions have important reference meaning for choosing the pit depth, reducing the clear- ance volume and increasing the combustion efficiency.