CRANKCASE VAPOUR/GAS RECIRCULATION SYSTEM

Description 1080D

1.2 8v, 1.4 8v

SPECIFICATIONS

The system controls the emission from the crankcase of lubricant oil vapours which rise to the cylinder head. There is a special pipe from the tappet cover that directs the lubricant oil vapours immediately downstream of the air filter so that they can be drawn in and burnt in the combustion chamber.

1. Oil vapour inlet hose

2. Throttle body

1.9 Multijet

CONSTRUCTION SPECIFICATIONS

The oil vapour emission control is achieved by means of a separator (1) (a function performed by the tappet cover) which collects the vapours released by the crankcase through the pipe (2).

The temperature difference between the separator and the oil vapours causes partial condensation.

The vapours that are not condensed are sent, via the pipe (3), to the turbocharger air intake hose.

The regulation valve in the tappet cover that consists of a spring (1) and a diaphragm (2) allows the phenomenon of intake to be prevented.

When the vacuum values inside the tappet cover exceed a recommended limit, the diaphragm moves downwards sealing the duct from the crankcase.

1.3 Multijet

SPECIFICATIONS

Function

The oil vapour emissions are controlled by means of an oil separator (1) which collects the vapours coming from the crankcase and from the timing cover via the pipe (2). The condensed vapours return to the sump, via a pipe (3), whilst the uncondensed vapours are sent, via a pipe (4) to the turbocharger air inlet hose.

1 - Oil separator

2 - Oil vapour outlet from the cover

3 - Condensed vapour sump return

4 - Inlet vapour delivery pipe