Thus, a two-cycle engine fires twice as often as a four-cycle engine.

这样说来，两冲程发动机的点火次数是四冲程发动机的两倍。

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The complete cycle of an engine requires four piston strokes: intake, compression power, and exhaust.

发动机完整的循环要求有活塞的四个冲程：进气、压缩、做功、排气。

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The cycle of operation of the four-stoke engine begins with the piston at TDC and the intake valve open.

四冲程发动机的工作循环是以活塞在上止点、进气门打开为开始的。

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When powered by gasoline, the C-MAX Energi uses the all-new 2.0-liter Atkinson-cycle four-cylinder engine - powerful and fuel efficient and among the most advanced non-turbocharged four-cylinder powertrains Ford has ever offered.

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

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During the class, we walked through my Desire Engine framework, a four-step cycle that creates preferences and usage habits.

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