滚动轴承在发动机凸轮轴上的研究与应用

Research and Application of Rolling Bearing in Camshaft

近年来随着排放法规要求越来越严格,汽车发动机面临的重要挑战就是提高燃油经济性和降低污染物的排放,在内燃机中机械摩擦产生的能量损失占燃料总能量的4%～15%,其中配气机构摩擦损失在发动机中低转速摩擦损失中可达20%～30%,通过将凸轮轴滑动轴承改为滚动轴承可降低配气机构10%(0.1 N·m)的摩擦损失。我们介绍了凸轮轴滚动轴承应用选型、尺寸设计、寿命计算、安装方法、降摩擦效果及耐久实验结果。

An recently with the more and more strict emission requirement,the most important challenge for automotive engine is how to improve the fuel efficiency and reduce the emission,the mechanical friction loss could occupy 4%.15% of the fuel energy,the valve train friction loss could reach 20%~30% at middle-low engine speed condition,using rolling element on camshaft bearing can reduce 10%(0.1 N·m)friction of valve train which is an effective solution to reduce friction.This paper introduced camshaft rolling bearing type in application,dimension design,life calculation,assembly methods,friction reduction effect and durability validation result.