对新的柴油机在气缸盖侧壁、中隔板、进排气道以及气门方面的改进进行了介绍。

The improvements of new diesel engines in terms of cylinder head side walls, middle walls, inlet and exhaust passages and valves were presented.

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进气冲程在活塞位与气缸顶部（进气门开启，排气门关闭）时开始，在活塞到达其行程的底部时结束。

The intake stroke starts with the pistonat the top of the cylinder (intake valve open and exhaust valve closed) and stops with the pistonat the bottom of its travel.

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