In continued operation the chain can jump a tooth on the drive sprocket or break entirely, with either case resulting in engine damage from valve-piston collisions.
在继续运作链可以跳转牙齿的驱动器上链轮或完全中断，与任何一种情况下造成的损害阀发动机活塞碰撞。
The cycle of operation of the four-stoke engine begins with the piston at TDC and the intake valve open.
四冲程发动机的工作循环是以活塞在上止点、进气门打开为开始的。
In the two-cycle engine, the piston ACTS as a valve, clearing valve ports in the cylinder wall as it nears BDC.
在二行程发动机中，活塞起到阀门的作用，当活塞接近下止点时，使气缸壁上的进排气口打开。
Also the valve heads will be liable to be burnt by the passing hot gases, and there is the likelihood of the piston crown touching an open valve, which can seriously damage the engine.
而且气门头部容易被经过的高温气体烧蚀，活塞顶部也可能会碰到气门使发动机严重损坏。
The expansion engine which has a inlet valve without exhaust valve, is a short piston engine.
膨胀机为进气有阀、排气无阀的短活塞型。
Also the valve heads will be liable to be burnt by the passing hot gases, and there is the likelihood of the piston crown touching an open valve, which can seriously damage the engine.
此外气门头易于被通过的热气体燃烧，这有可能使活塞频繁冲击打开的气门，使发动机严重损坏。
When engine is running, the valve and piston moves according to a certain rule.
发动机在运转时，气门、活塞各遵循一定的规律。
On the intake stoke, the piston moves down and the intake valve is opened, a vacuum is produced and causes air to be drawn or pulled into the engine.
在进气行程，活塞下行，进气门开启，产生真空使空气被吸进发动机。
Thus the function of the distance between valve and piston is put forward. 4160a diesel engine was chosen for example for analysis and calculation.
据此提出气门和活塞间距离的函数。并以4160a柴油机为例，进行了分析计算。
Thus the function of the distance between valve and piston is put forward. 4160a diesel engine was chosen for example for analysis and calculation.
据此提出气门和活塞间距离的函数。并以4160a柴油机为例，进行了分析计算。
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