分析顶置凸轮轴式配气机构的凸轮与摇臂之间相对运动状态,计算了接触表面的相对滑移速度和油膜卷入速度,计算了凸轮与摇臂之间的稳态和非稳态的润滑油膜厚度,给出不同转速时油膜厚度的变化曲线. The relative movement between the cam and the rocker arm of overhead camshaft gas distributing mechanism was analyzed. The relative sliding speed of contact surface and the rolling speed of oil film were calculated, and the steady state and unsteady state between cam and rocker arm were calculated Of the lubricating film thickness, given the different rotational speed of the film thickness curve.