poppet valve


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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 ?
The predicted charge motions are compared for the camless valve engine and the poppet valve engine in Figure 24.
These quantities were measured experimentally for different poppet valve configurations.
In this case, the poppet valve will not open and the radiator branch will never be included in the system.
But the holes for the internal flow path in the proprietary fixed poppet valve that was tested were too small, restricting flow.
electrical rooms takes place via fire-resistant poppet valves. for sound absorption, silencers are installed before and after the fan.
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.
NITRA pneumatic BVS series modular solenoid valves are body ported, three-port, two-position poppet valves available in normally open or normally closed configurations.
Now, two years later, the rMAX high-speed poppet valves are "still going strong," CenterPoint's Brad Goodwin said.
A switch from metal to PEEK has improved the performance of poppet valves produced by Performance Plastics, and with it the efficiency of the compressors on which they are used.
The engine in question isn't your typical weed whip's two-stroke, but a high-value design that mimics a typical automotive four-stroke engine design with overhead cams, poppet valves, and cylinder scavenging via a supercharger.
The Humphrey 315/415 Series direct-acting solenoid valves are only 19 mm-wide, yet have a 0.42 Cv flow rate, which is 35% higher than conventional poppet valves of the same size.
These include poppet valves for light liquids or the more versatile rotary valves.