Functions
GF01.20>W>0001H
Crankcase ventilation system function
1.7.11
ENGINES
471.9 in MODEL 963
The crankcase ventilation system is responsible for relieving the
pressure in the crankcase. To do this the gases are not led out of
the crankcase (blow
>
by gases) but are led into the air intake pipe
instead.
Since the blow
>
by gases contain engine oil it is led into an oil
separator so that oil does not get into the air intake pipe.
W01.20
>
1047
>
76
Sequence of the blow>by gases and the
engine oil
1
Oil separator (disk separator)
2
Vent line (from crankcase to oil
separator)
3
Vent line (from oil separator to air
intake pipe)
A
Separated out engine oil
B
Engine oil (to drive the centrifuge)
C
Blow>by>gas (with engine oil)
D
Blow>by>gas (clean)
The blow
>
by gas (C) generated by internal leakage at the piston
rings, valve stem seals, turbocharger and compressor passes over
the vent line (2) into the oil separator (1).
The engine oil separator (1). contained in the blow
>
by gas (C) is
separated off with the aid of a centrifuge.
The separated engine oil (A) runs downward along the inner wall
of the oil separator (1) and returns to the oil pan via the engine oil
drain.
The cleaned blow
>
by
>
gas (D) flows over the vent line (3) into the
air intake pipe.
A pressure regulating valve in the oil separator (1) regulates the
pressure in the crankcase.
i
The crankcase ventilation system is maintenance free.
Component description for oil separator
34
– This printout will not be recorded by the update service. Status: 09 / 2011 –
