poppet valve


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Related to poppet valve: Sleeve valve

poppet valve

[′päp·ət ‚valv]
(mechanical engineering)
A cam-operated or spring-loaded reciprocating-engine mushroom-type valve used for control of admission and exhaust of working fluid; the direction of movement is at right angles to the plane of its seat.

poppet valve

poppet valve
A mushroom-shaped valve in reciprocating engines for controlling the flow of gas in and out of cylinders. The valves are pushed open by cams on a rotating camshaft and closed by strong springs. In aircraft engines, the valves are generally located on the top of the cylinders.
References in periodicals archive ?
This opening of the poppet valve causes part of the coolant flow from the engine outlet to be taken through this radiator branch and enter the thermostat assembly.
These quantities were measured experimentally for different poppet valve configurations.
Chances are it will have ball valves where previous models had gate, butterfly, or poppet valves.
Dick Fleming offers assembly and set-up instructions, a list of parts you can buy locally, and various sizes and styles of check and poppet valves, for prices ranging from $56-$82.
This, Lotus Engineering said, enables control of the timing and lift displacement of the engine poppet valves for each individual crankshaft degree of rotation.
But the holes for the internal flow path in the proprietary fixed poppet valve that was tested were too small, restricting flow.
In contrast to the spherical rotary valve, the poppet valve resembles a golf tee and is driven by linkages connecting it to the engine camshaft.