What is the principle of the EGR valve?
1 Answers
The principle of the EGR valve: It controls the amount of exhaust gas flowing back from the exhaust manifold to the intake manifold through three metering holes with progressively increasing diameters, generating seven different flow rate combinations. Each metering hole consists of a solenoid valve and a needle valve. When the solenoid valve is energized, the armature is magnetically pulled upward, opening the metering hole. The characteristics of the rotary needle valve ensure good sealing when the EGR valve is closed. The EGR valve is a mechatronic product installed on gasoline engines to control the amount of exhaust gas recirculated back to the intake system. It is typically located on the right side of the intake manifold, near the throttle body, and is connected to the exhaust manifold via a short metal pipe. Its function is to regulate the amount of exhaust gas entering the intake manifold, allowing a certain amount of exhaust gas to flow into the intake manifold for recirculation.