positive crankcase ventilation

American  

noun

Automotive.

1. 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. PCV

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Example Sentences

National Highway Traffic Safety Administration say there could be an electrical short in the positive crankcase ventilation valve heater.

From Seattle Times

The aluminum positive crankcase ventilation valves can fall apart.

From Seattle Times

BMW says in documents filed with the government that moisture can get into the cars’ positive crankcase ventilation valve heater and cause plastic parts to degrade.

From Seattle Times

In these vehicles, the heater designed to keep the positive crankcase ventilation from freezing has the potential to short-circuit, causing the parts inside its valve to melt.

From New York Times