Exhaust Gas Recirculation (EGR) System
The exhaust gas recirculation system is a major part of your vehicle’s emissions control system. The EGR system takes a small amount of exhaust gases produced by the engine and redirects them back into the combustion chamber through the intake manifold where they mix with an air/fuel mixture or air. This allows for reducing combustion temperatures to below 2500° F, which prevents formation of harmful nitrogen oxide pollutants.
The key component of any exhaust gas recirculation system is an EGR valve, which stands for an exhaust gas recirculation valve. It does what its name says, rerouting some exhaust gases back into the motor to reduce pollution and to improve engine performance.