- (PCVV)Part of the positive crankcase ventilation system, which reroutes crankcase blowby to the intake manifold and back to the engine, where it is reburned in the cylinders as part of the fuel-air mixture. This cuts emission pollution and improve fuel economy because unburned fuel in the blowby is consumed the second time around. It also keeps the blowby and water vapor from fouling the oil in the crankcase, thus reducing the formation of engine sludge.
Dictionary of automotive terms. 2015.
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PCV valve — [pē΄sē΄vē′] n. [p(ositive) c(rankcase) v(entilation)] a one way valve on a motor vehicle engine for regulating a pollution control system that draws crankcase fumes into the cylinders for burning … English World dictionary
PCV valve — The Positive Crankcase Ventilation valve, or PCV valve, is a one way valve that ensures continual evacuation of gases from inside a gasoline internal combustion engine s crankcase.ExplanationAs an engine runs, gases and combustion pressure are… … Wikipedia
PCV valve — ¦pē(ˌ)sēˈvē noun Etymology: positive crankcase ventilation : an automotive emission control valve that recirculates gases (as from blow by) through the combustion chambers to permit more complete combustion * * * Auto. a valve used to control and … Useful english dictionary
PCV valve — Auto. a valve used to control and direct the flow of gases during positive crankcase ventilation. * * * … Universalium
valve — A device used to either open or close an opening to allow or prevent the flow of a liquid or gas from one place to another. There are many different types. See ABS relay valve accumultor valve air valve carburetor air control valve air gulp valve … Dictionary of automotive terms
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PCV — • Pressure Control Valve … Maritime acronyms and abbreviations
Crankcase ventilation system — A crankcase ventilation system is a way for gases to escape in a controlled manner from the crankcase of an internal combustion engine. A common type of such system is a positive crankcase ventilation (PCV) system, the heart of which is a PCV… … Wikipedia
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