The four strokes in the four-stroke-cycleengine, 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。
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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.
While a modified Otto cycleengine 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-strokeengine.