Pressure-Controlled Ventilation (See Pressure Control Mode.)
Proportional Control Valve
If the PCV valve is clogged, your car will run rough or stall. It may also cause engine to use oil, smoke, and have high emissions.
Positive Crankcase Ventilation.
Pressure Control Ventilation. Equivalent to time-triggered, pressure-limited, and time cycled ventilation
Positive Crankshaft Ventilation valve.