Four-stroke engine

The four-stroke engine is an internal combustion engine. The four strokes are:
StrokeAliasPistonIntake valveExhaust valveintakesuckopens, sucks in air + fuelopenclosedcompressionsqueezecloses, compressing the air + fuelclosedclosedcombustionbangopens, because air + fuel combust, expanding gas in cylinderclosedclosedexhaustblowcloses, blowing out the used gassesclosedopen

Related pages
 Two-stroke engine

Category:Motors