MTU Detroit Diesel 12 V 2000 P62, Technical Publication

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26 Product Summary
• Coolant pressure
• Charge air coolant level
• Lube oil pressure
• Lube oil temperature
Monitoring functions
The engine management system for engines used in Oil&Gas applications fulfills the following monitoring tasks:
• Control of analog instruments;
• engine speed (default)
• engine lube oil pressure (default)
• engine lube oil temperature (default)
• engine coolant temperature (default)
• Transmission of all measurands, warnings and alarms to monitoring system via CAN bus.
• Automatic shutdown in case of limit value violations.
Refer to the measuring-point list for order-specific configuration data.
Engine monitoring can basically be divided into two different areas:
• Engine protection system, monitors the engine during operation,
• Safety system, generates automatic engine shutdown in case of limit value violation.
These two functional areas are constantly monitored by the internal “Integral Test System
(ITS)” to ensure operational availability.
Engine protection system
The engine governor incorporates an integral engine protection system. It monitors the operational data of the engine.
Tasks of the engine protection system are:
• Safeguarding the engine from critical operating states.
• Signaling alarms to operating personnel.
• Restricting engine operation to remain within admissible operating values.
Action is taken such as warning, start interlock, power reduction or engine shutdown by reducing
the quantity of fuel injected depending on the values measured.
Closed-loop control functions
Closed-loop engine control functions:
• Speed
• Injection control with mapped commencement of injection.
• Two adjustable speed droops.
• Desired speed via:
• Analog or binary speed setting on the CAN bus.
• Analog speed setting 0 V to 10 VDC / 0 V to 5 VDC / 4 mA to 20 mA.
• Binary speed setting via Up/Down signal, frequency CAN bus.
• Frequency speed setting.
• Acquisition of a load pulse signal (analog or CAN bus) in preparation for load application.
• HP fuel governor.
Speed - injection control
Functions of the closed-loop engine speed control integrated in the engine governor:
• Maintaining the desired engine speed under changing load conditions.
• Adjusting the engine speed when the setting is changed by the operator.
Additional tasks with an effect on closed-loop engine speed control:
• Setting a defined fuel injection quantity on starting the engine.
• Engine safety shutdown.
• Optimizing operation, exhaust emissions and fuel consumption.
• Protecting the engine against overloading.
Speed droop calculation
Speed droop influences the effective setpoint speed depending on engine power. Maximum,
speed-dependent engine power is limited by the DBR curve. The setpoint speed is not influenced
by speed droop at 100% power. The effective setpoint speed increases at lower power. This allows
power to be balanced when operating a number of engines in a network.
MS15009/00E 06-09 © MTU