This paper discusses the inconsistency of the datum of measurment and that of design of cam lift of camshaft and suggests the method of cam lift measurment and the corresponding calculation formular for modification of cam lift.

• 本文对凸轮轴上的凸轮升程的测量基准和设计基准不重合问题进行了探讨，提出了凸轮轴上凸轮升程的测量方法及相应的修正计算公式。