What is the difference between a two-stroke and a four-stroke engine? Most chain saws and boat motors use two-stroke engines.

二冲程和四冲程发动机的区别： 大多数链锯和摩托艇使用的是二冲程发动机。

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Even when Saab finally decided to go with a four-stroke engine in 1967, it kept things weird by using a V-4.

就算萨博在1967年最终决定使用四冲程发动机，它还是把发动机搞成个V4，萨博总能把事情搞的古怪好玩。

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Otto built the practical four-stroke internal combustion engine called the "Otto Cycle Engine, " and as soon as he had completed his engine, he built it into a motorcycle.

奥托制造了第一台实用的四冲程内燃机，叫做“奥托循环发动机”，并且当完成制造他的发动机后他就把发动机安装在摩托车上。

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The BR500's four-stroke engine is five times cleaner than the standard two-stroke models.

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EcoMotors and Achates are developing two-stroke, opposed piston diesel engines while Pinnacle is working on a four-stroke opposed piston gasoline engine.

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How does a four-stroke gasoline engine work?

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