How Does a 2-Stroke Engine Work?
A 2-stroke engine fires on every revolution of the crankshaft and performs
all the functions of a 4-stroke engine using only 2 strokes (a combustion and a compression stroke).
It does this by inducting the fuel mixture into the crankcase towards
the end of the compression (upward) stroke and releasing the exhaust gases
towards the end of the combustion (downward) stroke.
A transfer port allows
the fuel mixture in the crankcase to escape around to the top of the piston
where it purges the main cylinder of exhaust gases before being finally
compressed by the upward moving piston.
Use the controls on the left to clearly view the working cycle of a 2-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!.