Word forms: (regular plural) exhaust valves
( Automotive engineering : Vehicle components , Engine, transmission, and exhaust )
The exhaust valve closes during the initial part of the induction stroke.
The inlet valve usually opens a little before top dead center and the exhaust valve remains open a little after top dead center.
As pressure increases during compression and combustion, a small amount of air-fuel
mixture is forced around the edges of the exhaust valve and between the valve and valve seat.
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