What is the function of the PCV valve in a car?

[SanAlexander]

The function of the PCV valve in a car is to prevent blow-by gases from entering the atmosphere and to prevent engine oil from deteriorating. Here is the relevant information: 1. Concept: The PCV valve in a car is a component of the crankcase forced ventilation system. The crankcase ventilation system is also commonly referred to as the PCV system, exhaust gas recirculation system, etc. Its basic installation location is on the valve cover or the connected intake pipe. 2. Composition: The PCV valve consists of a valve body, valve, valve cover, and spring, and cannot be disassembled. 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 icing at the throttle, incomplete combustion, and worsening emissions. It also prevents blow-by gases from entering the atmosphere and prevents engine oil from deteriorating.