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
Flathead engine
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A flathead engine, also known as a sidevalve engine or valve-in-block engine, is an internal combustion engine with its poppet valves contained within the engine block, instead of in the cylinder head
Poppet valve
…rockers and valve lifters). The shape of the cams on the camshaft influence the valve lift and determine the timing of when the valves open. Early flathead engines (also called L-head engines) saw the valves located beside to the cylinder(s), in an "upside down" orientation parallel to the cylinder. Although this…
A crossflow T-head sidevalve engine
1915 Cadillac flathead engine block
Harley-Davidson flathead
BMW R12