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Poppet Valve

A type of valve used in most piston engines to open and close the intake and exhaust ports in the cylinder head.

The valve consists of a flat disk of metal with a long rod (known as the valve stem) which is used to push down on the valve and open it. A spring wrapped around the valve stem closes the valve when the cam stops pushing on it.

See also Sleeve Valve.

Pneumatic Tyre      Port Fuel Injection



 
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