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Its as simple as 'Suck, Squeeze, Bang, Blow'.

1st stroke Down = vacuum draws in air and fuel from carb (suck)

2nd stroke UP = Compression of air and fuel (Squeeze)

3rd stroke Down = Mixture of air and fuel explodes pushing cylinder down. (Bang)

4th stroke Up = Kinetic movement of piston and crank shaft keeps moving pushing the cylinder back up and expelling the burnt air and fuel mixture. (blow)

back to 1st stroke again.

when most engines have 4 pistons all doing this at slightly different times the Bank stoke gives more than the force required to compress another cylinders contents.

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Related Questions

What happens during the compression stroke in an internal combustion engine?

During the compression stroke in an internal combustion engine, the piston moves upward, compressing the air-fuel mixture in the combustion chamber. This compression increases the pressure and temperature of the mixture, preparing it for ignition.


Which stage occurs just before ignition in an internal combustion engine?

The stage that occurs just before ignition in an internal combustion engine is the compression stroke. During this stage, the piston moves upward in the cylinder, compressing the air-fuel mixture, preparing it for combustion when the spark plug ignites the mixture.


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