中文摘要：

对内燃机排气凸轮／挺柱摩擦副进行了瞬态热弹性流体润滑仿真和瞬态等温弹性流体动力润滑仿真，并比较了2种仿真的结果．结果表明，尽管2种仿真得到摩擦副的接触压力、润滑油膜厚度以及摩擦系数在凸轮1个旋转周期内的变化趋势非常相近，但其参数的大小却差别较大，尤其是油膜厚度在2种数学模型下的计算结果相差5倍左右．在对此类摩擦副进行润滑研究时，不能忽略温度因素的影响．

英文摘要：

Transient thermoelastohydrodynamic lubrication （TEHL） simulation and isothermal elastohydrodynamic lubrication （EHL） simulation were performed on the exhausting engine. Results show that the center pressure, the thickness of cam-tappet friction pair of an internal combustion the lubricant film and the friction coefficient, all calculated from two models, exhibit similar variation trend during a rotating cycle. The magnitude, however, presented significant difference. Results show that effect of temperature should not be neglected in researching the lubrication of cam-tappet pairs.