Ddec Vi System; Motor Control Module - Detroit Diesel MBE 900 Operator's Manual

DDEC VI SYSTEM

DDEC VI SYSTEM
The engine is equipped with a fully
electronic control system, which
regulates the fuel injection quantity
and timing using solenoid valves,
allowing extremely low-emission
operation. Besides the engine and
its related sensors, the system is
composed of the following:
□ The Motor Control Module
(MCM)
□ The Common Powertrain
Controller (CPC) located under
the right-hand dash panel
The two control units are connected by
a proprietary datalink through which
all necessary data and information can
be exchanged.
The CPC then broadcasts all
information on the J1587 and J1939
datalinks, where it can be read by the
diagnostic tool.
The engine control system monitors
both the engine and the datalink.
When a malfunction or other problem
is detected, the system selects an
appropriate response; for example,
the emergency running mode may be
activated.
The Accelerator Pedal Assembly
(AP) eliminates the need for any
throttle linkage.
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DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION

Motor Control Module

The MCM (see Figure 18) is located
on the left-hand side of the engine.
The MCM processes the data received
from the CPC, for example the
position of the accelerator pedal,
engine brake, etc.
Figure 18 MCM
These data are evaluated together
with the data from the sensors on
the engine, such as coolant and
fuel temperature and oil and charge
pressure.
All information subject to change without notice. (Rev. 04/08)