piston during each cycle. The stroke length, along with bore diameter, determines the engine's displacement.

Phases in the power cycle

Commonly used engine phases or strokes (i.e. those used in a four-stroke engine) are described below. Other types of engines can have very different phases.

Induction-intake stroke

The induction stroke is the first phase in a four-stroke (e.g. Otto cycle

1.Previous
3.Next