What is the order of the four-stroke engine process?
A) Intake, compression, power, valve overlap
B) Intake, compression, exhaust, cool-down
C) Intake, exhaust, compression, valve overlap
D) Intake, compression, power, cool-down

Question

Quizplus · Accepted Answer

The correct order of the four-stroke engine process is intake, compression, power, and exhaust. However, "valve overlap" is not a phase of the cycle itself but a moment between the exhaust and intake phases in some engines. The correct sequence, commonly known, is intake (air-fuel mixture enters the cylinder), compression (the mixture is compressed), power (ignition and expansion of gases to produce power), and exhaust (expelled burnt gases). Since none of the options perfectly match this sequence due to the inclusion of incorrect or non-standard terms, option A is the closest to describing the process despite the terminology error.

What Is the Order of the Four-Stroke Engine Process