MTU 12 V 4000 M23F Operating Instructions Manual page 18

Electronic engine governor (ECU)
Functions:
• Engine speed control with fuel and speed limitation dependent on engine status and operating condi-
tions
• Control of sequential turbocharging, cylinder bank cut-out and air recirculation function
• Data processing logistics for analog and binary signals
• Interface for data transfer to CAN field bus for remote control and ship-side monitoring
Electronic Engine Monitoring Unit (EMU)
Functions:
• Data processing logistics for analog and binary signals
• Interface for data transfer to CAN field bus for remote control and ship-side monitoring
Low-load operation
12/16V4000M53R/M53/M63R/M63/M63L engines
1 Low-load operation 2 Cleaning cycle 3 ditto
MTU marine engine Series 4000M53R to ...M93L may be operated in low-load operation. State-of-the-
art design and equipment features, e.g. TE coolant circuit, sequential turbocharging, jacketed, coolant-
cooled exhaust lines, Common Rail fuel injection and cylinder cutout allow engine operation at low load.
Nevertheless, low-load operation at engine load below 15% of the nominal rating is permitted for max.
100 hours. In order to avoid inadmissible oil carbon and/or carbon particle deposits in the engine, it is
recommended to carry out a cleaning cycle for at least 20 minutes after extended low-load operation
periods. During the cleaning cycle, engine speed (power) must be increased step by step until all ex-
haust turbochargers are running. The figure shows the basic speed/power run-up procedure for the
cleaning cycle to be carried out.
18 | Product Summary | MS150068/01E 2014-01