four-cycle

four-cy•cle adj.

Automotive, Mechanical Engineeringnoting or pertaining to an internal-combustion engine in which a complete cycle in each cylinder requires four strokes, one to draw in air or an air-fuel mixture, one to compress it, one to ignite it and do work, and one to scavenge the cylinder.

Also, four-stroke. Cf. two-cycle.

Collins Concise English Dictionary © HarperCollins Publishers::

four-cycle adj

US Canadian relating to or designating an internal-combustion engine in which the piston makes four strokes for every explosion
Compare two-stroke

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