Word forms: (regular plural) compression strokes
( Automotive engineering : Vehicle components , Engine, transmission, and exhaust )
compression1, compression2, stroke
The intake valve closes and the piston starts up on the compression stroke.
During the compression stroke, the piston moves up the cylinder, squeezing the fuel-air mix.
At the end of the compression stroke, the spark plug fires the rich mixture in the precombustion chamber.
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