SERIES 60 EGR TECHNICIAN'S GUIDE Provides EGR transport mechanism in EGR mode More vane closure increases the EGR flow rate (PWM % is high). Less vane closure decreases the EGR flow rate (PWM % is low). Provides enhanced engine brake capability. The VNT vanes adjust to control the exhaust gas velocity. See Figure 2-7. Figure 2-7 VNT Vane Position Vane Position During Engine Operation PWM 7% No air pressure to VNT actuator from the VPOD Minimum exhaust restriction/Minimum EGR flow while operating in EGR Mode PWM 50% Regulated air pressure to the VNT actuator from the VPOD Moderate exhaust restriction Increased EGR flow while operating in EGR Mode PWM 90%:
Maximum regulated air pressure to the VNT actuator from the VPOD Maximum regulated exhaust restriction/Maximum EGR flow while operating in EGR Mode All information subject to change without notice. (Rev. April 2004) 2-7 7SE60 0404 Copyright © 2004 DETROIT DIESEL CORPORATION