- A valve structure consisting of a circular head with an elongated stem attached in the center, very much like the shape of a mushroom with a flat top. It is designed to open and close a circular hole or port. Its name comes from the fact that it pops up and down. In engines, it is the valve used to open and close the valve port entrances to the engine cylinders.
Dictionary of automotive terms. 2015.
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Poppet valve — A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide. In most… … Wikipedia
poppet valve — diskinis vožtuvas statusas T sritis automatika atitikmenys: angl. mushroom valve; poppet valve vok. Tellerventil, n rus. дисковый клапан, m; тарельчатый клапан, m pranc. soupape à plateau, f; soupape à siège plat, f … Automatikos terminų žodynas
poppet valve — noun a mushroom shaped valve that rises perpendicularly from its seat; commonly used in internal combustion engines • Syn: ↑poppet • Hypernyms: ↑valve • Part Holonyms: ↑internal combustion engine, ↑ICE * * * noun … Useful english dictionary
poppet valve — noun A valve (as in an internal combustion engine) which consists of a sliding shaft with a disk on the end (the disk being shaped to alternately plug and unplug a matching port) and which is operated by springs and possibly cams interacting with … Wiktionary
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… … Aviation dictionary
poppet-valve — … Useful english dictionary
poppet — [päp′it] n. [var. of PUPPET] 1. TAILSTOCK 2. a valve that moves into and from its seat: often cam driven and spring loaded for a rapid repeating, popping action as in a gasoline engine: in full poppet valve 3. any of certain timbers used to… … English World dictionary
Valve float — is an adverse condition which occurs when the poppet valves on an internal combustion engine valvetrain do not remain in contact with the camshaft lobe during the valve closure phase of the cam lobe profile. This reduces engine efficiency and… … Wikipedia
Valve gear — The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It is sometimes referred to as the… … Wikipedia
Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… … Wikipedia