Snapshot Examples; Normal Engine Operation As Viewed With Dddl Snapshots - Detroit Diesel Series 60 EGR Technician Manual

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SNAPSHOT EXAMPLES

SNAPSHOT EXAMPLES
The following snapshots are intended to show you how to "interpret" the information recorded.
Use the examples to try to determine what area contains the fault.
Due to the variety of operating conditions that affect actual EGR flow and Turbo boost or speed
readings, the following examples SHOULD NOT be used as a good vs. bad criteria.
Each snapshot that follows was controlled during running on a chassis dynamometer.
Some failures were induced to display the logic used to determine what is wrong with a particular
area of the engine.
Idle operation with EGR. See Figure 7-1.
Cold Idle operation without EGR flow. See Figure 7-2.
Throttling without load, EGR is on and off. See Figure 7-3.
1500 rpm throttling no EGR. See Figure 7-4.
EGR Valve stuck open. See Figure 7-5.
147 14, EGR Flow too Low. See Figure 7-6.
146 2 EGR leak – boost. See Figure 7-7.
Leaking Charge Air Cooler. See Figure 7-8.
Delta P port plugged (graph). See Figure 7-9.
Normal Acceleration – Automatic Transmission. See Figure 7-10.
Typical EGR flow loaded. See Figure 7-11.
Normal Operation EGR off, Colder ambient. See Figure 7-12.
Plugged Delta P port (EGR tab). See Figure 7-13.

Normal Engine Operation as Viewed With DDDL Snapshots

It is important to understand what Normal looks like During normal engine operation, all
parameters should have smooth transitions.
Review the snapshots in this section for examples of normal engine operation.
All information subject to change without notice. (Rev. June 2005)
7SE60 0506 Copyright © 2005 DETROIT DIESEL CORPORATION
SERIES 60 EGR TECHNICIAN'S MANUAL
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