SUPPORT ] --> [ 2 stroke engine ]
How does a two stroke work
At the point where the spark plug fires, fuel and
air in the cylinder have been compressed, and when the spark
plug fires the mixture ignites.
The resulting forces drives the piston downward.
As the piston moves downward, it is
compressing the air/fuel mixture in the crankcase.
As the piston approaches the bottom of its stroke, the exhaust port
is uncovered. The pressure in the cylinder drives most of the
exhaust gases (but not all) out of cylinder.
As the piston finally bottoms out, the intake
port is uncovered. The piston's movement has pressurized the mixture
in the crankcase, so it rushes into the cylinder, displacing the
remaining exhaust gases and filling the cylinder with a fresh charge
Now the momentum in the crankshaft starts
driving the piston back toward the spark plug for the compression
As the air/fuel mixture in the piston is compressed, a vacuum is
created in the crankcase. This vacuum opens the reed valve and sucks
air/fuel/oil in from the carburetor. Once the piston makes it to the
end of the compression stroke, the spark plug fires again to repeat