positive crankcase ventilation

(PCV) A process introduced in 1963 for preventing the buildup of harmful acid-producing combustion gases within the crankcase. See closed crankcase ventilation.

Dictionary of automotive terms. 2015.

Look at other dictionaries:

  • positive crankcase ventilation — Auto. a means of reducing air pollution by directing the fumes from the crankcase of an engine into the intake manifold, so that they will be channeled into the cylinders and burned. Abbr.: PCV * * * …   Universalium

  • positive crankcase ventilation — Auto. a means of reducing air pollution by directing the fumes from the crankcase of an engine into the intake manifold, so that they will be channeled into the cylinders and burned. Abbr.: PCV …   Useful english dictionary

  • 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

  • positive crankcase ventilation valve — (PCVV) a one way valve which controls the flow of vapors from the crankcase into the engine …   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

  • crankcase 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

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

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