Volvo Penta TAD734GE, TAD550-551GE, TAD750-751GE, TAD752-754GE, TAD560-561VE, TAD650VE, TAD660VE, TAD750VE, TAD760VE, TAD761-765VE
Technical parameters, instructions, maintenance and repair instructions for standard products. Volvo Penta engine maintenance and repair must comply with Volvo Penta recommended maintenance and maintenance intervals. Please use spare parts approved by Volvo Penta
Volvo Penta accessories DCU stands for Display Control Unit
Let’s introduce the functions of DCU. DCU is a digital instrument panel that communicates with the engine control unit via a CAN link. The DCU has several functions, such as:
1: Controls engine start, stop, speed control, preheating, etc.
2: Monitors engine speed, intake pressure, intake manifold temperature, coolant temperature, oil pressure, oil temperature, engine hours, battery voltage, instantaneous fuel consumption and fuel consumption (trip fuel).
3: Diagnoses engine faults during operation and displays fault codes in text. Lists previous faults.
4: Parameter settings – Warning limits for idle speed, oil temperature/coolant temperature, droop. – Ignition preheating.
4: Information – Information about hardware, software and engine identification.
Once the Volvo Penta DCU control unit has analyzed the engine’s fuel requirements, the amount of fuel injected into the engine and the injection advance are fully electronically controlled via the fuel valves in the injectors. This means that the engine always receives the correct amount of fuel under all operating conditions, resulting in lower fuel consumption, minimized exhaust emissions, etc.
The control unit monitors and reads the unit pumps to ensure that the correct amount of fuel is injected into each cylinder. It also calculates and sets the injection advance. Control is mainly achieved with the help of speed sensors, fuel pressure sensors and a combined intake pressure/intake manifold temperature sensor.
The control unit controls the injectors via signals sent to the solenoid-operated fuel valves in each injector, which can be opened and closed.
Volvo Penta fuel quantity calculation The amount of fuel injected into the cylinder is calculated by the control unit. The calculation determines when the fuel valve is closed (fuel is injected into the cylinder when the fuel valve is closed).
The parameters that control the amount of injected fuel are as follows:
• Requested engine speed
• Engine protector function
• Temperature
• Intake pressure
Altitude correction
The control unit also has an altitude compensation function including an atmospheric pressure sensor and for engines running at high altitudes. This function limits the fuel quantity in relation to the ambient air pressure. This prevents smoke, high exhaust temperatures and prevents turbocharger overspeed.
Volvo Penta diagnostic function
The task of the diagnostic function is to detect and locate any faults in the EMS 2 system in order to protect the engine and notify any problems that occur.
If a fault is detected, it is notified by a warning lamp, a flashing diagnostic lamp or plain language on the control panel, depending on the equipment used. If the fault code is obtained in the form of a flashing code or plain language, it is used to guide any fault finding. The fault code can also be read out with the Volvo VODIA tool at an authorised Volvo Penta workshop. In the event of severe interference, the engine is completely shut down or the control unit reduces the power output (depending on the application). The fault code is set again to guide any fault finding.
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Post time: May-23-2025