Egr Operation - Detroit Diesel MBE 900 Technician Manual

PRELIMINARY MBE EGR TECHNICIAN'S GUIDE
3

EGR OPERATION

The EGR is turned off for low engine speeds and high loads. Otherwise, over the broad range of
normal operation, the EGR control map values are set at mid-range. The EGR control valve has a
practical adjustable range from 5% (closed position) to 85% (position of maximal flow area).
The EGR will operate until conditions are encountered that result in unacceptable operating
characteristics. If coolant temperature, barometric pressure, engine speed, and percent torque
are below certain limits, the EGR will be disabled. Excessively high charge air temperature will
disable the EGR to prevent engine damage.
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All information subject to change without notice. (Rev. 5/05)
7SE940 0505 Copyright © 2005 DETROIT DIESEL CORPORATION