如果气门关闭不严,发动机就不能发挥出全部的功率。
If the valves do not close fully the engine will not develop full power.
所以阀门能完全关闭,气门间隙在操作机构内是必须的。
So that the valves can close fully some clearance is needed in the operating mechanism.
气门杆上的弹簧使气门保持在气门座上(关闭状态)。
A spring on the valve stem tends to hold the valve on its seat (closed).
气门杆上的弹簧使气门保持在气门座上(关闭状态)。
A spring on the valve stem tends to hold the valve on its seat (closed).
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