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Stroke (engines)




In a Steam , Otto or Diesel Piston Engine , a stroke is the action of a Piston travelling the full length of its Cylinder in one direction.

The stroke length is determined by the Cranks on the Crankshaft . Stroke can also refer to the distance the piston travels; for example, the phrase "''This engine has a four inch stroke''" means that on each stroke, the piston travels four Inch es.

In a Pistonless Rotary Engine , the term is applied to the corresponding rotor movement, see '' Top Dead Centre ''.

See also '' Reciprocating Engine ''.