How many flywheel revolutions are there in a complete four-stroke cycle?

In a complete four-stroke cycle, there are two revolutions of the flywheel. This is because a four-stroke engine operates through four distinct strokes: intake, compression, power, and exhaust. These strokes require two complete revolutions of the crankshaft to achieve the power cycle.

During the first revolution of the crankshaft, the intake and compression strokes occur. The engine draws in the air-fuel mixture during the intake stroke and compresses it during the compression stroke. The second revolution of the crankshaft facilitates the power stroke, where combustion occurs, followed by the exhaust stroke, allowing the engine to expel the spent gases.

Thus, it is essential to recognize that the effective operation of a four-stroke engine necessitates two flywheel revolutions to complete the entire cycle of intake, compression, power, and exhaust.