Iveco Marine Diesel Engines, Installation Handbook

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MARCH 2004 FUEL SUPPLY
6.67
MARINE ENGINES INSTALLATION
6.1 FUEL CHARACTERISTICS
The fuel inside the engine fulfils two basic functions:
■
it is used for the thermodynamic transformation of the energy
■
it cools down and lubricates the elements and components of the injection system (pump, injec-
tors, etc.)
The characteristics of the fuel prescribed for IVECO engines comply with UNI EN 590 specifications;
they correspond to those of the diesel fuel produced by the most qualified Oil Companies and dis-
tributed at filling stations.
6.2 HYDRAULIC CIRCUIT
The fuel circuit function is to supply the right quantity of fuel to the engine injection system. The fuel
has to be clean and not polluted with remains and water and it is necessary to drain off the fuel sur-
plus from the reservoir.
A fuel circuit accurately designed and correctly implemented is fundamental for the regular engine
operation, in particular at start up.
The design and implementation of the whole system are part of the expertise and responsibility of the
shipyard.
The fuel circuits required for IVECO engines are characterised by the use of different injection systems,
as illustrated in the following figures:
CIRCUIT FOR TRADITIONAL MECHANICAL PUMP
Figure 1