Overview of Volvo Engine Electronic Diesel Control
In last article, we talk about Volvo engine safety operation. In this post, we will turn
to introduce Volvo engine electronic diesel control. If you are interested,
please continue reading.
EDC 4 (Electronic Diesel Control) is an
electronic system with CAN (Controller Area Network) or potentiometer
communications for diesel engine control. The system includes fuel management
and diagnostic functions.
Overview
The system includes sensors, control
unit and an engine speed regulator. The sensors send input signals to the
control unit, which in turn governs the injection pump control rack by means of
an actuator in the engine speed regulator.
Input signals
The control unit receives input signals
about engine operating conditions from the following components:
1. rpm sensor, camshaft
2. coolant temperature sensor
3. charge pressure sensor
4. oil pressure sensor
5. fuel temperature sensor
6. coolant level sensor (the function
is implemented in the control unit as standard, but no sensor is supplied with
the engine as a standard feature.)
Output signals
The control module uses the input
signals to control the following components:
1. engine speed regulator (with
position sensor for the control rack and actuator)
2. electric air preheating (option)
Information from the sensors provides
exact information about current operation conditions and allows the processor
to calculate the correct fuel volume, check engine status etc.
Diagnostics function
The task of the diagnostics function is
to detect and localize any malfunctions in the EDC 4 system, to protect the
engine and to ensure operation in the event of serious malfunction.
If a malfunction is detected,
notification is made either by the diagnostic function, by warning lamps or via
the CAN network. Pressing the diagnostic button will provide the operator with
a fault code for guidance in any fault-tracing. Fault codes can also be read off
via the CAN interface or using the Volvo VODIA tool (including Penta EDC 4
software) at an authorized Volvo Penta workshop.
If there is a serious malfunction, the
engine is shut down altogether. Here too, fault codes can be flashed out via
the diagnostics connector, the CAN interface or with the Volvo VODIA tool
(including the Penta EDC4 software) at an authorized Volvo Penta workshop.
Instruments and Controls
Gauges
The engines are not supplied with
instruments and controls. The choice of instruments and controls is up to the
customer. Below is a description of the functions available.
A. Rpm-potentiometer (Throttle control)
B. CAN interface SAE J 1939
C. VODIA input
D. Droop switch
E. 1500/1800 switch
F. Diagnostics button
G. Tachometer
H. Warning lamp, oil pressure
J. Diagnostics lamp
K. Warning lamp, coolant temperature
L. Fuse15A
M. Main switch
N. Battery (orange indication) (24/12
V)
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