PRIN. OF INTERNAL COMBUSTION ENGINES - OD1619 LESSON 1/TASK 1
INTAKE AND EXHAUST PORTS AND VALVES.
Each time the piston moves from top dead center to bottom dead center, or vice
versa, it completes a movement called a stroke.
Therefore, the piston completes
two strokes for every full crankshaft revolution. There are four definite phases
of operation that an engine goes through in one