7.1
DDEC ECM SOFTWARE FEATURES
7.1.5
Engine Brake (Jake Brake)
Enabling the engine brake is done on the mainframe. Once turned on, output cavities S3 and T3
are automatically configured to provide voltage to the brake solenoids when the ECM calibrated
parameters are met allowing activation.
Also requires two inputs, engine brake low and engine brake med.
Several options are available (programming station or DDR set) relative to engine brake
operations:
Dynamic Fan Braking
Enables the cooling fan whenever the engine brake is in high mode. This feature is
able to be configured with the programming station or DDR. (DDR software level
2.0 or higher.)
Engine Brake / Service Brake
This feature forces the operator to, in addition to the normal requirements, press the
service brake in order to initiate the engine brake(s). Can be set with the DDR or
programming station.
Engine Brake Minimum MPH
This feature allows the customer to set a minimum mph to allow the engine brake to
activate. Can be set with the DDR or programming station.
Engine Brake Cruise
Allows engine brakes to activate to programmed levels automatically based on vehicle
speed increases. Initial speed is low. The speed of the increments is medium, then
high. Level (high, med, low) is limited by dash position switch.
Can be set with the DDR or programming station.
7.1.6
Engine Protection Features
Engine protection features can be set with the DDR or programming station. Three features are
available:
Shutdown
Rampdown
Warning
7.1.7
Engine Synchro Shift
Engine Synchro Shift ™ (ESS) can be set with the programming station. ESS is a joint
development between DDC and Rockwell.
The ESS system automatically synchronizes the transmission by matching the engine r/min speed
to the road speed of the vehicle, eliminating the need to use the clutch pedal for shifting gears.
Refer to publication number 6SE498, Engine Synchro Shift (ESS) Troubleshooting Manual .
Requires an ESS transmission type, two inputs (in gear and in neutral), and two outputs (high
range solenoid and low range solenoid).
All information subject to change without notice.
7-4
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
