Marine Installation Manual
2021-08
4-61
4 Ancillary Systems
4.5 Pilot fuel oil system
X72DF
4.5
Pilot fuel oil system
Relevant installation information for the pilot fuel system is included in the fuel
oil system
Marine Installation Drawing Set
(DG 9723), which is provided on
the WinGD webpage under the following link:
Flushing the pilot fuel oil
system and treatment
of pilot fuel oil
The requirements for flushing the pilot fuel oil system and for the treatment of
pilot fuel oil are similar to those described in the fuel oil system sections (see sec
-
and
).
Functionality
The pilot fuel system operates during all engine operating modes (gas, diesel and
fuel sharing operation) as outlined in section
Pilot fuel is injected into the combustion chamber to ignite the gas charge.
The pilot fuel system is designed for operation on MDO (DMB, DFB grades) and
MGO (DMA, DFA, DMZ, DFZ grades).
The diesel oil is delivered by a fuel oil feed pump via a diesel oil cooler and a
filter to the engine as shown in
.
Sulphur content
In general, the pilot fuel sulphur content must comply with the limits of the ap
-
plicable emission regulations. Project-specific exceptions might be granted in
some areas on certain conditions, e.g. continuous sulphur emission measure
-
ments.
Figure 4
-
37 Pilot fuel oil system
On-engine
pilot fuel oil system
The on-engine pilot fuel pump unit raises the pilot diesel oil pressure to the re
-
quired level. The unit consists of an electrically-driven radial piston pump (with
built-in overpressure bypass valve), fuel filters, and a pressure control valve.
Main Engine
1
SM-0207
V
LT cooling
water system
1 MGO service tank
2 MGO pump
From storage tank
2
3
4
3 MGO heat exchanger
4 Viscometer
5 Fuel oil filter
5
