Poppet valve
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In internal combustion engines, a poppet valve is a valve typically used to control the timing and quantity of petrol or vapour flow into or out of an engine, but with many other applications.
Overhead camshaft engine
Oscillating poppet valve on one of Chapelon's rebuilt 4-6-2 locomotives
Poppetvalve
Valvetrain
Videos
A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. The intake valves control the flow of air/fuel mixture into the combu
Poppet valve
…end of the valve stem, with a spring generally being used to return the valve to the closed position. At high engine speeds (RPM), the weight of the valvetrain means the valve spring cannot close the valve as quickly enough, leading to valve float or valve bounce. Desmodromic valves use a second rocker arm to…
Cutaway of a dual overhead camshaft engine
1969 AMC V8 overhead valve engine. The rocker cover has been removed, so elements of the pushrods, rocker arms, valve springs, and valves are visible.
Ship engine with open rocker arms