Mechanical system that controls operation of the valves in an internal combustion engine.
Valve typically used to control the timing and quantity of gas or vapour flow into an engine.
A mushroom-shaped valve that rises perpendicularly from its seat; commonly used in internal-combustion engines.
1
The accompanying sketch illustrates a two-cylinder single-acting, poppet valve steam engine of home construction.
2
I saw even then that the secret of a well-set poppet valve -short travel -was bound to win out against prejudice.
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