MAN B&W 8.02
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MAN Diesel
MAN B&W ME-B engines 198 53 18-6.2
Internally on the engine, the system oil inlet RU
is connected to the Hydraulic Power Supply unit
(HPS) which supplies the hydraulic oil to the Hy-
draulic Cylinder Units (HCUs). The HPS unit is
mounted onto the engine and is electrically driven.
The hydraulic power supply unit shown in Fig.
8.02.01, consists of:
• an automatic main filter with a redundancy filter,
in parallel
• two electrically driven pumps
• a safety and accumulator block
RW is the oil outlet from the automatic backflush-
ing filter.
The HPS in service
The max. operating pressure for the hydraulic oil
to the HCUs is 300 bar.
At start and in service both pumps are activated.
Each of the pumps has a capacity sufficient to op-
erate the engine with 55% engine power enabling
around 80% ship speed, should one pump fail.
The hydraulic oil is supplied to the Hydraulic Cyl-
inder Units (HCU), where it is supplied to the elec-
tronic Fuel Injection system, which perform the
fuel injection.
The electronic signals to the proportional Elec-
tronic Fuel Injection control (ELFI) valves are given
by the Engine Control System, see Chapter 16,
Engine Control System (ECS).
Hydraulic Power Supply Unit
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