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。
2
Gas turbine engines use the Brayton cycle. Wankel rotary engines use the Otto cycle, but they do it in a very different way than four-stroke piston engines.
转子活塞发动机用的是四冲程循环，但是它们和四冲程活塞发动机有很大不同。
3
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.