Diagram Showing Recirculation Of Cases From The Engine Crankcase (Blow-By) - Fiat Bravo Service Manual

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DIAGRAM SHOWING RECIRCULATION OF G A S E S COMING FROM T H E ENGINE CRANKCASE ( B L O W - B Y )

The engine crankcase emissions are composed of a mixture of air, diesel fuel and burnt gases w h i c h es-

cape from the piston seals in addition to lubricant oil vapours. They are defined as b l o w - b y or breather

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 w h i c h 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 d r o p -

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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