用 Stoddart方法计算某种高速内燃发动机凸轮的升程曲线,是一种较为有效的方法。使用这种方法设计高速发动机凸轮时,能考虑到气阀机构的作用力及它的柔性。无冲击凸轮(一般指函数凸轮)是把气阀作为一个刚体来处理的,它仅能保证到加速度的连续性,但并没考虑到系统的弹性变形,即 Calculating the lift curve of a high-speed internal combustion engine cam with Stoddart method is a more effective method. When designing a high-speed engine cam using this method, the force of the valve mechanism and its flexibility can be taken into account. No impact cam (usually refers to the function of the cam) is to handle the valve as a rigid body, it can only guarantee the continuity of the acceleration, but did not take into account the elastic deformation of the system, that is