Hydraulic Cylinder Unit
The hydraulic cylinder unit (HCU) consists of a
base plate on which a distributor block is mount-
ed. The distributor block is fitted with one accu-
mulator to ensure that the necessary hydraulic oil
peak flow is available for the Electronic Fuel Injec-
tion.
The distributor block serves as a mechanical sup-
port for the hydraulically activated fuel pressure
booster.
There is one Hydraulic Cylinder Unit per two cyl-
inders. The HCU is equipped with two pressure
boosters, two ELFI valves and two Alpha Lubrica-
tors. Thereby, one HCU is operating two cylinders.
The Hydraulic Power Supply
The Hydraulic Power Supply (HPS) is installed in
the front end of the engine. The HPS is electrically
driven and consists of two electric motors each
driving a hydraulic pump.
The pressure for the hydraulic oil is 300 bar. Each
of the pumps has a capacity corresponding to
min. 55% of the engine power. In case of malfunc-
tion of one of the pumps, it is still possible to op-
erate the engine with 55% engine power, enabling
around 80% ship speed.
Fuel Oil Pressure Booster and
Fuel Oil High Pressure Pipes
The engine is provided with one hydraulically acti-
vated fuel oil pressure booster for each cylinder.
Fuel injection is activated by a proportional valve,
which is electronically controlled by the Cylinder
Control Unit.
The fuel oil highpressure pipes are double-walled
and insulated but not heated.
Further information is given in Section 7.01.
Fuel Valves and Starting Air Valve
Each cylinder cover is equipped with two fuel
valves, starting valve, and indicator cock.
The opening of the fuel valves is controlled by
the high pressure fuel oil created by the fuel oil
pressure booster, and the valves are closed by a
spring.
An automatic vent slide allows circulation of fuel
oil through the valve and high pressure pipes
when the engine is stopped. The vent slide also
prevents the compression chamber from being
filled up with fuel oil in the event that the valve
spindle sticks. Oil from the vent slide and other
drains is led away in a closed system.
The mechanically driven starting air distributor is
the same as the one used on the MC-C engines.
The starting air system is described in detail in
Section 13.01.
Engine Control System
The ME-B Engine Control System (ECS) controls
the hydraulic fuel booster system, the fuel injec-
tion, governor function and cylinder lubrication.
The ECS consists of a number of computer-based
control units, operating panels and auxiliary
equipment located in the engine room and the en-
gine control room.
The ME-B Engine Control System is described in
Chapter 16.
To Next Page
Loading...
Need help?
General
