엔진 캠/태핏 시스템의 작동토크 측정과 마찰특성

The operating torque and tribological characteristics of a carn/tappet system of an LC. en-gine have an important effect on the engine efficiency. More power is lost for higher opera-tion torque which is affected by the friction of a earn/tappet system. In this work experi-mental investigation of the torque behavior of a carn/tappet system was conducted to get tribological characteristics. Specifically, the torque was measured with respect to oil tempe-rature and camshaft speed. The torque decreased with increasing camshaft speed because of decreasing friction coefficient but was hardly affected by the oil temperature. Also, the tor-que was the largest near the cam nose region.