What is a vehicle PCV?

1 Answers
MilaMarie
07/30/25 4:45am
Vehicle PCV is the Positive Crankcase Ventilation system, a metering control valve composed of a valve body, valve, valve cover, and spring, which is non-disassemblable and installed between the engine crankcase ventilation system and the intake system. Below is an introduction to PCV: 1. Introduction: The PCV valve of a car is a component of the Positive Crankcase Ventilation system. The crankcase ventilation system is often referred to as the PCV system, exhaust gas recirculation system, etc. Its basic installation location is on the valve cover and the connected intake pipe. Its function is to prevent blow-by gases from entering the atmosphere and to prevent engine oil from deteriorating. 2. Function: The PCV valve consists of a valve body, valve, valve cover, and spring, and is non-disassemblable. Its main function is to direct the gases from the crankcase into the intake manifold through the PCV valve, with a small amount of air entering the intake manifold directly from the air filter via the PCV valve. This prevents phenomena such as throttle icing, incomplete combustion, and emission deterioration. It also prevents blow-by gases from entering the atmosphere and prevents engine oil from deteriorating.
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