Exhaust Gas RECIRCULATION System: Description

The Exhaust Gas Recirculation (EGR) system, recirculates exhaust gases into the combustion chamber to reduce combustion temperature. The reduction in temperature acts to reduce oxides of Nitrogen (NOx) emissions. Typical EGR system components include an EGR valve, EGR solenoid, coolant temperature sensor, thermal vacuum valve, Back-Pressure Transducer (BPT), vacuum delay valve, and various connecting hoses and tubes.