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经验证明,发动机气门导管磨损较快。为了减少导管的磨损,有设置特种杯形物以传导摇臂压力于气门者。此特种杯形物,可使气门桿避免受摩擦力矩的作用。但如果摇臂一端之凸块,其曲线轮廊能准确决定,即使摇臂端与气门瑞直接接触,而不用特种中间杯形物,导管磨损亦可以免除。摇臂沿气门端摩擦(滑动)行程之值S,可以下式表示之: 此处:R=摇臂凸块曲线轮廓之半径; a=摇臂回转中心至气门中线之最短距离。
Experience has shown that engine valve guides wear faster. In order to reduce the wear and tear of the catheter, a special cup is provided to transmit the pressure of the rocker to the valve. This special cup, the valve stem to avoid the role of friction torque. However, if the rocker at one end of the bump, the curve of the corridor can be accurately determined, even if the rocker end and valve Rui direct contact without the special middle cup, catheter wear and tear can be removed. The value S of the rocker arm stroke (sliding) stroke along the valve end can be expressed as follows: where: R = radius of the curve of the rocker projection; a = shortest distance from the rocker arm center of rotation to the center line of the valve.