How Does a 4-Stroke Engine Work?
A 4-stroke engine fires on every other revolution of the crankshaft and gets it name from the 4 separate strokes for:
During the induction stroke, downward movement of the piston draws the fuel/air mixture into the combustion chamber.
Upward movement of the piston then compresses the mixture ready for the spark plug to ignite the mixture for the combustion stroke (or power stroke).
Finally, the upward movement of the piston clears the remaining gases, pushing them through the exhaust valve.
Use the controls on the left to clearly view the working cycle of a 4-stroke engine.
Press the upper PLAY button to play or pause and use the lower STEP button to step through the animation one frame at a time!.