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MAN B&W 7.00
As can be seen in Fig. 7.00.04, the normal fuel oil
pressure booster, which supplies pilot oil in the
dual fuel operation mode, <strong>is</strong> connected to the
ELGI valve by a pressure gauge and an on/off
valve incorporated in the ELGI valve.
By the control system, the engine can be operated
in the various relevant modes: normal ‘dual�fuel
mode’ with minimum pilot oil amount, ‘specified
gas mode’ with injection of a fixed gas amount, and
the ‘fuel�oil�only mode’.
Low pressure fuel supply
Fuel return
Measuring and
limiting device.
Pressure booster
(800�900) bar)
200 bar hydraulic oil.
Common with
exhaust valve actuator
The system provides:
Pressure, timing, rate shaping,
main, pre� and post�injection
Injection
Fig. 7.00.04: �GI fuel injection system
Position sensor
FIVA valve
ELGI valve
Bar abs
800
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MAN B&W ME/ME-C/ME-B/-GI 198 48 84-6.2
MAN Diesel
600
400
200
0
Pilot oil pressure
Control oil pressure
Gas
0 5 10 15 20 25 30 35 40 45
Deg. CA
178 53 63�3.0