A stroke refers to the full travel of the piston from Top Dead Center (TDC) to Bottom Dead Center (BDC). The cycle begins at top dead center (TDC), when the piston is farthest away from the axis of the crankshaft.
The four strokes refer to intake, compression, combustion (power), and exhaust strokes that occur during two crankshaft rotations per working cycle of the gasoline engine and diesel engine.Ī less technical description of the four-stroke cycle is, "Suck, Squeeze, Bang, Blow"
Today, internal combustion engines in cars, trucks, motorcycles, aircraft, construction machinery and many others, most commonly use a four-stroke cycle. The cylinder wall is a thin sleeve surrounded by cooling water. The right blue side is the intake and the left yellow side is the exhaust. Four-stroke cycle used in gasoline engines.
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