Four-stroke Engine

Four-stroke engines are more common outside of the moped world, though some mopeds such as Indians use four-stoke engines. The four strokes refer to intake, compression, combustion and exhaust strokes that occur during two crankshaft rotations per working cycle of Otto cycle and Diesel engines. The four steps in this cycle are often informally referred to as "suck, squeeze (or squash), bang, blow."

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