B 10 01 1
General Description
1605544-1.5
Page 4 (5)
L28/32H
The lubricating oil pipes for the gear wheels are
equipped with nozzles which are adjusted to apply
the oil at the points where the gear wheels are in
mesh.
Governor
The engine speed is controlled by a hydraulic or
electric governor.
Monitoring and Control System
All media systems are equipped with thermometers
and manometers for local reading and for the most
essential pressures the manometers are together
with tachometers centralized in an engine-mounted
instrument panel.
The number of and type of parameters to have alarm
function are chosen in accordance with the re-
quirements from the classification societies.
The engine has as standard shut-down functions for
lubricating oil pressure low, cooling water tempera-
ture high and for overspeed.
Turbocharger System
The turbocharger system of the engine, which is a
constant pressure system, consists of an exhaust
gas receiver, a turbocharger, a charging air cooler
and a charging air receiver, the latter being inter-
grated in the engine frame.
The turbine wheel of the turbocharger is driven by
the engine exhaust gas, and the turbine wheel drives
the turbocharger compressor, which is mounted on
the one shaft. The compressor sucks air from the
engine room, through the air filters.
The turbocharger pumps the air through the char-
ging air cooler to the charging air receiver. From the
charging air receiver, the air flows to each cylinder,
through the inlet valves.
The charging air cooler is a compact tube-type
cooler with a large cooling surface. The cooling
96.12
water is passed twice through the cooler, the end
covers being designed with partitions which cause
the cooling water to turn.
The cooling water tubes are fixed to the tube plates
by expansion.
From the exhaust valves, the exhaust is led through
a water cooled intermediate piece to the exhaust gas
receiver where the pulsatory pressure from the indi-
vidual exhaust valves is equalized and passed to the
turbocharger as a constant pressure, and further to
the exhaust outlet and silencer arrangement.
The exhaust gas receiver is made of pipe sections,
one for each cylinder, connected to each other, by
means of compensators, to prevent excessive
stress in the pipes due to heat expansion.
In the cooled intermediate piece a thermometer for
reading the exhaust gas temperature is fitted and
there is also possibility of fitting a sensor for remote
reading.
To avoid excessive thermal loss and to ensure a
reasonably low surface temperature the exhaust
gas receiver is insulated.
Compressed Air System
The engine is started by means of a built-on air
starter.
The compressed air system comprises a main star-
ting valve, an air strainer, a remote controlled start-
ing valve and an emergency starting valve which will
make it possible to start the engine in case of a power
failure.
Fuel Oil System
The built-on fuel oil system consists of the fuel oil
filter and the fuel injection system. An engine-driven
fuel oil feed pump can be mounted as optional.
The fuel oil feed pump, which is of the gear pump
type, is mounted to the front end of the engine frame
and driven by the camshaft through a splined shaft
Содержание L28/32H
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