positive crankcase ventilation system

(PCV) A process for preventing the buildup of harmful acid-producing combustion gases within the crankcase. See closed crankcase ventilation.

Dictionary of automotive terms. 2015.

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  • crankcase ventilation system — See positive crankcase ventilation system …   Dictionary of automotive terms

  • 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

  • crankcase ventilation — circulation of air through the crankcase of a running engine to remove water, blow by, and other gases in order to prevent oil dilution and contamination, sludge formation, and pressure build up. Also see closed crankcase ventilation positive… …   Dictionary of automotive terms

  • ventilation system — See positive crankcase ventilation system …   Dictionary of automotive terms

  • ventilation — [1] A provision of a free or controlled circulation of air. [2] Forced airflow, by design, between one area and another. See closed crankcase ventilation crankcase ventilation flow through ventilation positive crankcase ventilation system… …   Dictionary of automotive terms

  • crankcase — The lower part of the engine that surrounds the crankshaft. It contains the crankshaft, pistoncylinders, connecting rods and other moving parts of the engine. As well, in non air cooled engines, it has a number of internal passages for the… …   Dictionary of automotive terms

  • system — An orderly, interconnected, complex arrangement of parts. See accumulator system air filtration system air injection reaction system air system alarm system anti dive system anti lock brake system anti noise system …   Dictionary of automotive terms

  • PCV system — Abbreviation for positive crankcase ventilation system. A system which prevents crankcase vapors from being discharged directly into the atmosphere. Also see closed crankcase ventilation …   Dictionary of automotive terms

  • emission-control system — ▪ automotive technology       in automotive engineering, means employed to limit the discharge of noxious gases from the internal combustion engine. There are four main sources of these gases: the engine exhaust, the crankcase, the fuel tank, and …   Universalium

  • exhaust emission control system — A general term for any system that reduces the harmful exhaust emissions of a motor vehicle, including one or all of the following systems: catalytic converter (with or without oxygen sensor air/fuel control), exhaust gas recirculation, secondary …   Dictionary of automotive terms

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