four-stroke cycle


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Related to four-stroke cycle: Compression stroke, Intake stroke

four-stroke cycle

[¦fȯr ¦strōk ′sī·kəl]
(mechanical engineering)
An internal combustion engine cycle completed in four piston strokes; includes a suction stroke, compression stroke, expansion stroke, and exhaust stroke.

four-stroke cycle

four-stroke cycle
Induction stroke.
four-stroke cycle
Compression stroke.
four-stroke cycle
Power stroke.
four-stroke cycle
Exhaust stroke.
The sequence of operations by which a reciprocating engine converts heat energy into mechanical energy. During the induction strokes, the fuel-air mixture is inducted into the engine. During the compression stroke, the mixture is compressed. The power stroke follows, during which the mixture is ignited and the resultant rapid increase in pressure drives the piston downward. The exhaust stroke is last, during which the products of combustion are ejected.
References in periodicals archive ?
In the four-stroke cycle the first down stroke sucks air into the piston, which is compressed by the up stroke.
Whether two stroke cycle (2SC) or four-stroke cycle (4SC), all engines must intake fresh air charge, purge spent gases and then intake another fresh air charge.
All current industrial engine offerings are four-stroke cycle diesel engines and swept displacement below 3 L.