Fiat 1996 Brava Service Manual page 404

Bravo-Brava ty
TD100
Engine
Fuel system
10.
DIAGRAM SHOWING RECIRCULATION OF GASES COMING FROM THE ENGINE CRANKCASE (BLOW-BY)
The engine crankcase emissions are composed of a mixture of air, diesel fuel and burnt gases which es­
cape from the piston seals in addition to lubricant oil vapours. They are defined as blow-by or breather
gases.
The breather gases coming from both the cylinder block/crankcase and the cylinder head through the
pipe (3), reach the separator (2) where, following the vortex action to which they are subjected, they
lose part of the oil dissolved in them which returns to the sump through the pipe (4) in the form of drop­
lets.
The remaining gases, on the other hand, are directed, via the pipe (5), to the inlet circuit.
There is a spark-out (6) fitted inside the gas outlet pipe (1) on the cylinder head to prevent combustion
due to flame returns.
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