ENGINE PROTECTION SYSTEM

MARINESHELF publishes articles contributed by seafarers and other marine related sites solely for the benefit of seafarers .All copyright materials are owned by its respective authors or publishers.

ENGINE PROTECTION SYSTEM

            The engine protection system is fitted to prevent damage occurring to main engine plant. The following functions are fitted

• Overspeed: Activated when the engine speed increases over 107% of MCR. The emergency solenoid is activated, which for the MC engine will activate the puncture valve system of the fuel pumps

The over speed is reset by placing the maneouvring control in stop position and then restarting the engine, once the engine revolutions have fallen.

• Shutdown: The engine will shutdown if any of the following sensors are activated:
1. Lub oil low pressure 1.0bar
2. Thrust bearing high temp 85*c
3. J C W outlet high temp 96*c
4. Camshaft lub oil low press 1.5bar

The shutdown can be configured as either cancelable( with a time delay between activation and engine trip) or non-cancellable which will trip the engine immediately. As with the overspeed, the shutdown is reset by placing the lever in stop position and ten restarting the engine.

• Slowdown: The engine will slowdown to dead slow position when one of the following sensors are activated

                                                             I.      Lub oil low pressure 1.5bar

                                                          II.      Camshaft oil low pressure 2.0bar

                                                       III.      Thrust block high temp 75*c

                                                       IV.      Piston coolant no flow

                                                          V.      Scavenge air temp high 65*c

                                                       VI.      Oil mist detection high

                                                    VII.      Cyl exhaust temp high 450*c

                                                 VIII.      High L O inlet temp 60*c

                                                       IX.      Piston coolant high temperature

                   The slowdowns can also be configured as cancel able and non-callable. They are reset once the sensor is DE activated and the engine control lever is placed below the shut-down level or the reset slow down button is pressed.

The emergency run button fitted on the bridge panel will over-ride the slowdown function when pressed.