Valve System Components
在发动机运转时，配气系统零部件控制进入气缸的空气和燃料流量以及从气缸中排出废气的流量。
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| 图 1 | g00813876 |
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(1) 摇臂
(2) 气门桥 (3) 气门旋转器 (4) 气门弹簧 (5) 推杆 (6) 阀 (7) 凸轮随动件 (8) 凸轮凸角 | |
曲轴齿轮通过惰轮驱动凸轮轴。 凸轮轴与曲轴必须同步，以便在活塞运动和气门运动之间获得正确的关系。
每个气缸凸轮轴有两个凸轮轴凸角 (8)。 当凸轮轴转动时，凸轮轴凸尖引起凸轮随动件 (7) 和推杆 (5) 上下移动。
推杆移动摇臂 (1)。 摇臂的运动引起气门桥 (2) 在缸盖定位销上上下移动。 这种运动使气门 (6) 工作。 气门桥使一个摇臂能够同步运转两个气门。 每一缸都有两个进气门和两个排气门。
在发动机运转时，气门旋转器 (3) 转动气门。 气门旋转可使气门上的积碳保持在最少程度，从而延长气门的使用寿命。
当凸轮随动件 (7) 向下移动时，气门弹簧 (4) 关闭气门。
Caterpillar Information System:
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