What does PCV valve mean?
1 Answers
PCV is the abbreviation of POSITIVE-CRANKCASE-VENTILATION in English, which means the positive ventilation control system of the crankcase (or oil pan) in Chinese. The PCV valve consists of a valve body, valve, and valve cover, and cannot be disassembled. The PCV valve is generally installed between the valve rocker cover and the intake manifold. The following is relevant information about the PCV valve: 1. Function of the PCV valve: At the end of the engine combustion process, some unburned mixture leaks into the crankcase under high pressure from the piston rings. These blow-by gases will escape from the crankcase into the atmosphere, causing pollution. If these blow-by gases are not removed, they will also dilute the oil in the crankcase, causing the oil to deteriorate and leading to premature wear of engine components. Therefore, a PCV valve is installed on the valve cover to allow these exhaust gases to re-enter the engine through the intake manifold for re-combustion. 2. PCV valve inspection method: After reinstalling the PCV valve, remove the crankcase intake pipe from the air filter, and lightly cover the pipe opening with a thin piece of paper. When the pressure in the crankcase decreases, the thin paper should be visibly sucked towards the pipe opening. In addition, after stopping the engine, remove the PCV valve and shake it by hand to check. If a "click" sound is heard, it indicates that the PCV valve is flexible and usable.
