The four strokes in the four-stroke-cycle engine, in their proper order, are intake, compression, power, and exhaust.

四冲程循环发动机中，四个冲程的固定顺序是：进气、压缩、作功和排气。

youdao

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。

youdao

While a modified Otto cycle engine using the "Atkinson cycle" provides good fuel economy, it is at the expense of a lower power-per-displacement as compared to a traditional four-stroke engine.

虽然修改奥托循环发动机使用“阿特金森循环”提供良好的燃油经济性，这是比较传统的四冲程发动机在一个较低的功耗，每位移费用。

youdao

For years he had contemplated the inefficiencies of the traditional four-stroke Otto cycle engine (named for its 1876 developer, Nikolaus A. Otto).

FORBES: How To Get 50 MPG Out Of Your Gasoline Engine