本文介绍了内燃机凸轮润滑特性的三个评定参数,即润滑特性数N_s、流体动力评定特性数N_γ和无量纲润滑特性数(?)_s。导出了它们之间的关系,从润滑角度出发总结了设计凸轮型线的一些基本观点,提出了对N_s=0点的要求:(dN_s/dφ)N_s=0≥3mm/°,并对几种常用内燃机凸轮的这些润滑特性的评定参数作了计算,从而得出了一些结论。 This paper introduces three evaluation parameters of internal combustion engine cam lubrication characteristics, namely the lubrication characteristic number N_s, the hydrodynamic rating characteristic number N_γ and the non-dimensional lubrication characteristic number (?) _s. The relationship between them is derived. From the point of view of lubrication, some basic ideas of designing cam profiles are summarized. The requirement of N_s = 0 is put forward: (dN_s / dφ) N_s = 0≥3mm / °, Commonly used internal combustion engine cam lubrication parameters of these parameters were calculated, which led to some conclusions.