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Presentation
Control unit (1)
The EDC III system’s processor is located in the con-
trol unit, protected from moisture and vibrations.
The processor continually receives information regar-
ding:
– rpm levels
– intake boost pressure
– intake temperature
– coolant temperature
– oil pressure
– oil temperature
– fuel alarm, includes both ”water in fuel” as well as
”fuel pressure”
– coolant level
The information provides a precise overview of current
operational conditions making it possible for the pro-
cessor to do such things as determine the correct fuel
dosage and check on the engine’s condition.
Fuel management
The fuel needs of the engine are analyzed up to 100
times per second. Fuel injection quantity and timing
are controlled electronically via fuel valves in the unit
injectors.
This means that the engine always receives the cor-
rect amount of fuel under all operating conditions,
providing benefits including improved fuel economy
and minimized exhaust emissions.
Diagnostic function
The diagnostic system’s function is to detect and lo-
calize disturbances within the EDC III system, to pro-
tect the engine as well as to insure the ability to con-
trol the engine during serious disturbances.
If a disturbance is detected a diagnostic indicator in
the control panel will begin to blink. Pushing the dia-
gnosis button will provide the operator with an error
code to assist in locating the problem.
EDC III
EDC III stands for ”Electronic Diesel Control” and is an electronic system with CAN (Controller Area Network)
communication for diesel engine management. The system was developed by Volvo Penta and includes such pa-
rameters as fuel management and diagnostic functions.
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