Last step, exhaust valve opens, piston travels up, it forces that spent burnt gases out your exhaust pipe, out into the atmosphere.

最后一步，排气阀打开，活塞上移动，它迫使燃烧过的气体从排气入大气。

Then the intake valve closes, and an exhaust valve opens.

然后气阀关闭，打开 排气阀。

The exhaust valve leads to a condenser, which cools the steam back into water.

排气阀通冷凝器，冷凝器 蒸汽冷却并返回水中。

Four-stroke engine has an enough overlap between inlet valve opening and exhaust valve closing.

四冲程发动机的气门开启与排气门关闭之间有足够的重叠。

The fresh water is circulated through the engine to cool the cylinder jackets, cylinder heads, exhaust valves and turbo-blowers.

新鲜水在发动机内循环，用于冷却气缸套、气缸盖、排气阀和涡轮增压器。