Functionality Of Egr Components; Egr Valve View - Detroit Diesel Series 60 EGR Technician Manual

DDEC V COMPONENTS
See Figure 8-15 for a view of the EGR valve.
1. EGR Valve Assembly
2. EGR Control Valve Oil Feed Connection
Figure 8-15 EGR Valve

FUNCTIONALITY OF EGR COMPONENTS

The following subsections detail the functions of specific EGR components.
DDEC V Electronic Control Unit
The Electronic Control Unit (ECU) provides overall engine management, self-diagnostic checks,
and monitors other system components. System diagnostic checks are made at ignition-on and
continue throughout all engine-operating modes.
A DDEC equipped engine is built with an electronically controlled fuel injection system which
eliminates control racks or mechanical linkages requiring periodic adjust. Fuel economy and
vehicle performance are also improved during cold starting and the increased initial idle speed
allows for fast engine warm-up.
Horsepower, torque, idle, and engine speed are managed by the ECU. Such functionality
eliminates the need for a mechanical governor. Mechanical governors are equipped with springs
that require adjustments for idle and high-speed control.
The Accelerator Pedal Assembly (AP) eliminates the need for any throttle linkage eliminating
throttle delay.
8-16
3. EGR Control Valve Oil Return Line Connection
4. EGR Control Valve Hydraulic Actuator
All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION