This section is available on request - MAN Diesel & Turbo

MAN B&W 1.06
Auxiliary Blower
The engine <strong>is</strong> provided with electrically�driven
scavenge air blowers. The suction side of the
blowers <strong>is</strong> connected to the scavenge air space
after the air cooler.
Between the air cooler and the scavenge air receiver,
non�return valves are fitted which automatically
close when the auxiliary blowers supply the air.
The auxiliary blowers will start operating consecutively
before the engine <strong>is</strong> started in order to ensure
sufficient scavenge air pressure for a safe start.
Further information <strong>is</strong> given in Chapter 4.
Exhaust Turbocharger
The engines can be fitted with either MAN Diesel,
ABB or Mitsub<strong>is</strong>hi turbochargers.
The turbocharger choice <strong>is</strong> described in Chapter
, and the exhaust gas system in Chapter 5.
Exhaust Gas Receiver
The exhaust gas receiver <strong>is</strong> designed to withstand
the pressure in the event of ignition failure of one
cylinder followed by ignition of the unburned gas
in the receiver (around 5 bar).
The receiver <strong>is</strong> furthermore designed with special
transverse stays to withstand such gas explosions.
Reversing
Reversing of the engine <strong>is</strong> performed electronically,
by changing the timing of the fuel injection, the exhaust
valve activation and the starting valves.
Hydraulic Cylinder Unit
The hydraulic cylinder unit (HCU), one per cylinder,
cons<strong>is</strong>ts of a support console on which a d<strong>is</strong>tributor
block <strong>is</strong> mounted. The d<strong>is</strong>tributor block <strong>is</strong> fitted with a
number of accumulators to ensure that the necessary
hydraulic oil peak flow <strong>is</strong> <strong>available</strong> for the Electronic
Fuel Injection.
Page 4 of 8
The d<strong>is</strong>tributor block serves as a mechanical support
for the hydraulically activated fuel pressure
booster and the hydraulically activated exhaust
valve actuator.
To reduce the number of additional hydraulic pipes
and connections, the ELGI valve as well as the
control oil pipe connections to the gas valves will
be incorporated in the design of the HCU.
Fuel Oil Pressure Booster and
Fuel Oil High Pressure Pipes
The engine <strong>is</strong> provided with one hydraulically activated
fuel oil pressure booster for each cylinder.
Fuel injection <strong>is</strong> activated by a proportional valve,
which <strong>is</strong> electronically controlled by the Cylinder
Control Unit.
Further information <strong>is</strong> given in Section 7.0 .
Gas Valve block
The valve block cons<strong>is</strong>ts of a square steel block,
bolted to the HCU side of the cylinder cover.
The valve block incorporates a large volume accumulator,
and <strong>is</strong> provided with a shutdown valve
and two purge valves. All high�pressure gas sealings
lead into spaces that are connected to the
double�wall pipe system, for leakage detection.
An ELGI valve and control oil supply are also incorporated
in the gas valve block.
The gas <strong>is</strong> supplied to the accumulator via a
non�return valve placed in the accumulator inlet
cover.
To ensure that the rate of gas flow does not drop
too much during the injection period, the relative
pressure drop in the accumulator <strong>is</strong> measured.
The pressure drop should not exceed approx.
0� 0 bar.
Any larger pressure drop would indicate a severe
leakage in the gas injection valve seats or a fractured
gas pipe. The safety system will detect th<strong>is</strong>
and shut down the gas injection.
MAN B&W ME-GI engines 198 50 59-7.1
MAN Diesel