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<strong>MAN</strong> B&W 9.02<br />
<strong>MAN</strong> B&W Alpha Cylinder Lubricati<strong>on</strong> System<br />
The <strong>MAN</strong> B&W Alpha cylinder lubricati<strong>on</strong> system,<br />
see Figs. 9.02.02 and 9.02.03, <str<strong>on</strong>g>is</str<strong>on</strong>g> designed to supply<br />
cylinder oil intermittently, every 2 to 20 engine<br />
revoluti<strong>on</strong>s with electr<strong>on</strong>ically c<strong>on</strong>trolled timing<br />
and dosage at a defined positi<strong>on</strong>.<br />
Cylinder lubricating oil <str<strong>on</strong>g>is</str<strong>on</strong>g> fed to the engine by<br />
means of a pump stati<strong>on</strong> which as standard <str<strong>on</strong>g>is</str<strong>on</strong>g><br />
mounted <strong>on</strong> the engine, EoD: 4 42 150, or could<br />
be placed in the engine room, opti<strong>on</strong>: 4 42 152.<br />
The pump stati<strong>on</strong> has two pumps (<strong>on</strong>e operating,<br />
the other stand-by with automatic start up) with<br />
in-line filters and a heater, see Fig. 9.02.02.<br />
The oil fed to the injectors <str<strong>on</strong>g>is</str<strong>on</strong>g> pressur<str<strong>on</strong>g>is</str<strong>on</strong>g>ed by<br />
means of <strong>on</strong>e or two Alpha Lubricators placed<br />
<strong>on</strong> each cylinder and equipped with small<br />
multi�p<str<strong>on</strong>g>is</str<strong>on</strong>g>t<strong>on</strong> pumps, see Fig. 9.02.03.<br />
Accumulator tanks <strong>on</strong> the lubricator inlet pipes<br />
ensure adequate filling of the lubricator while accumulators<br />
<strong>on</strong> the outlet pipes serve to dampen<br />
the pressure fluctuati<strong>on</strong>s. The oil pipes fitted <strong>on</strong><br />
the engine <str<strong>on</strong>g>is</str<strong>on</strong>g> shown in Fig. 9.02.03.<br />
On engines with double lubricators, a by-pass<br />
valve allows for circulating and heating the cylinder<br />
oil before starting the engine under cold<br />
engine room c<strong>on</strong>diti<strong>on</strong>s. On engines with <strong>on</strong>e lubricator<br />
per cylinder, th<str<strong>on</strong>g>is</str<strong>on</strong>g> <str<strong>on</strong>g>is</str<strong>on</strong>g> d<strong>on</strong>e by means of the<br />
valve <strong>on</strong> the cylinderblock intended for emptying<br />
the accumulator.<br />
Prior to start-up, the cylinders can be pre-lubricated<br />
and, during the running�in period, the operator<br />
can choose to increase the lubricating oil feed<br />
rate to a max. setting of 200%.<br />
<strong>MAN</strong> B&W K98MC6/7, K98MC�C6/7, S90MC-C7/8, K90MC-C6,<br />
S80MC6, S80MC-C7/8, K80MC-C6, S70MC6, S/L70MC-C7/8,<br />
S60MC6, S/L60MC-C7/8, S50MC6, S50MC-C7/8, S46MC-C7/8,<br />
S42MC7, S40MC-C9, S35MC-C9, L35MC6, S26MC6<br />
<strong>MAN</strong> <strong>Diesel</strong><br />
System c<strong>on</strong>trol units<br />
Page 1 of 5<br />
The cylinder lubricati<strong>on</strong> system <str<strong>on</strong>g>is</str<strong>on</strong>g> c<strong>on</strong>trolled by<br />
the Master C<strong>on</strong>trol Unit (MCU) which calculates<br />
the injecti<strong>on</strong> frequency <strong>on</strong> the bas<str<strong>on</strong>g>is</str<strong>on</strong>g> of the enginespeed<br />
signal given by the tacho signal (ZE) and<br />
the fuel index.<br />
Lubricating c<strong>on</strong>trol functi<strong>on</strong>s such as ‘mep dependent’<br />
and ‘load change dependent’ are all<br />
incorporated in the <strong>MAN</strong> B&W Alpha cylinder lubricati<strong>on</strong><br />
system.<br />
The <strong>MAN</strong> B&W Alpha Cylinder Lubricator <str<strong>on</strong>g>is</str<strong>on</strong>g> preferably<br />
to be c<strong>on</strong>trolled in accordance with the<br />
Alpha Adaptive Cylinder oil C<strong>on</strong>trol (Alpha ACC)<br />
feed rate system. The Alpha ACC <str<strong>on</strong>g>is</str<strong>on</strong>g> explained in<br />
the following page.<br />
The MCU <str<strong>on</strong>g>is</str<strong>on</strong>g> equipped with a Backup C<strong>on</strong>trol Unit<br />
(BCU) which, if the MCU malfuncti<strong>on</strong>s, activates<br />
an alarm and takes c<strong>on</strong>trol automatically or manually,<br />
via a Switch Board Unit (SBU), Fig. 9.02.04.<br />
The MCU, BCU and SBU together compr<str<strong>on</strong>g>is</str<strong>on</strong>g>e the<br />
Alpha Cylinder Lubricator C<strong>on</strong>trol Unit (ALCU) in<br />
shape of a single steel cabinet which <str<strong>on</strong>g>is</str<strong>on</strong>g>, as standard,<br />
located in the Engine C<strong>on</strong>trol Room. Fig.<br />
9.02.05 shows the wiring diagram for the <strong>MAN</strong><br />
B&W Alpha Cylinder Lubricati<strong>on</strong> System.<br />
The yard supply should be according to the items<br />
shown in Fig. 9.02.02 within the broken line.<br />
198 56 32-4.2