COMPONENTS EGR (exhaust gas recirculation) allows a percentage of the exhaust gases to remix with the air coming into the intake manifold. The exhaust gas dilutes the incoming air, displacing some of the oxygen in the air. Less oxygen results in a slower burn and a reduced peak cylinder temperature which reduces NOx (nitrogen oxides). Figure 2-1 illustrates how components of the EGR system function. See Figure 2-2 and Figure 2-3 to familiarize yourself with the EGR components. 1. VNT Turbocharger 6. S Pipe 2. Turbo Vane Actuator 7. EGR Valve 3. EGR Valve Actuator 8. EGR Cooler 4. Delta Pressure Sensor 9. High Flow Water Pump 5.
EGR Gas Delivery Pipe Figure 2-2 Right Side View 2-2 All information subject to change without notice. (Rev. April 2004) 7SE60 0404 Copyright © 2004 DETROIT DIESEL CORPORATION