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Presentation
The D12D-A MP is an in-line, direct injection 6-cylinder marine diesel engine.
The engine has electronically controlled fuel injection, a turbocharger, aftercooler, heat exchanger and thermostati-
cally controlled freshwater cooling, electronically controlled engine speed control and shifting.
The exhaust manifold and turbocharger are freshwater cooled to reduce heat radiation to the engine room
D12D-A MP
Technical description
Engine and cylinder block
– The cylinder block and cylinder head are manufac-
tured of alloyed cast iron
– Induction hardened crankshaft journalled in seven
main bearings
– Replaceable wet cylinder liners
– Gallery oil cooled cast aluminium pistons
– Three piston rings, including a “keystone” type top ring
– Induction hardened overhead camshaft with roller
rocker arms
– Four valves per cylinder
– Replaceable valve seats and valve guides
Fuel system
– Microprocessor based fuel supply control unit
– Gear driven fuel feed pump
– Centrally located unit injectors with electromagneti-
cally controlled fuel valves
– Spin-on fine fuel filter with water trap
Lubrication system
– Freshwater cooled oil cooler
– Gear driven oil pump
– Side mounted or rear mounted full flow and by-
pass oil filters of spin-on type
Turbocharging system
– Turbocharger with freshwater cooled turbine housing
Cooling system
– Tube heat exchanger ( or 1- circuit keel cooling)
with expansion tank
– Plate type freshwater cooled aftercooler
– Gear driven seawater pump
Electrical system
– 24V electrical system, alternator (60A) with charge
sensor
– Engine mounted emergency stop button
– Power modul
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