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9 Cards in this Set
- Front
- Back
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function of the diesel engine
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Mt. Whitney has 2 in-line Fairbanks-Morse 38 D8- 1-1/8th type, 6 cylinder,
Opposed piston diesel engines connected to generators that provides: 1200 amps 450 volts 750 KW power each in the event that normal power (ship or shore) is lost. 3 Phase 60HZ |
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INTAKE AIR SYSTEM
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This air is used for combustion and to purge exhaust gasses from the cylinders. Supplies air, through an intake air filter, to the blower then to the air box compartment of the engine then distributed to the cylinders.
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FUEL SYSTEM
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Provides fuel to the engine for combustion.
F-44 (jp5) is gravity fed from the day tank to the fuel oil pump, which delivers fuel to the injection pump. The injection pump delivers fue1 to the nozzles, which sprays fuel into the cylinders. |
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LUBE OIL (L/O) SYSTEM
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Provides oil for lubrication of various internal moving parts. The lube oil pump to a strainer delivers lube oil in the engine sump, then to the lube oil cooler, then through a filter. The oil is then distributed to the parts that require lubrication. The engine sump capacity is 110 gallons and the oil is type 9250.
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GOVERNOR SYSTEM
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The diesel engines governor is a speed control device that maintains the engine speed at a constant 900 rpm for 60HZ output.
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JACKET COOLING WATER SYSTEM
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Cools the diesel engine and prevent it from overheating under normal operating conditions. Jacket water is also the cooling medium for lube oil. Seawater cools the jacket water in the jacket water cooler. Jacket water is distilled water treated with MIL-53009 inhibitor, which prevents scale build-up inside the engine, jacket water cooler and all associated piping
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START AIR SYSTEM
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Delivers a large volume of hp air reduced to 250 PSI to start the diesel engines automatically by electric solenoid or manually by hand operated pressure relief valve.
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CYCLE OF OPERATION
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When power is lost, high-pressure air (2250-3000 PSI) passes through a reducer and delivers a large volume of air to the starter at 250 PSI which rotates the engine. Air is injected to each cylinder through ports and is then compressed by the upper and lower pistons which also raises the temperature of the air. A fuel injection nozzle injects atomized (fine spray) fuel into the high temperature compressed air and combustion occurs, starting the engine. The pistons are connected to the crank shaft. As the gasses expand the pistons separate thus turning the crank shaft. As the ports are open again fresh air purges and replaces the exhaust gasses from the cylinders. The cycle starts over except hp air is no longer needed to turn the engine.
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Four cycles :
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1. Intake (suck)
2. Compression (squeeze) 3. Combustion (bang) 4. Exhaust (blow) |
