Fiat 1996 Brava Service Manual page 291

Engine
Fuel system
10.
Bravo-Brava I0i 16v
9 8 range
Charcoal filter solenoid valve
The function of this valve is to control the
quantity of fuel vapours drawn in by the ac­
tive charcoal filter and directed to the inlet
manifold by means of the injection/ignition
electronic control unit.
If this valve has no supply, it is closed, pre­
venting the fuel vapours from excessively en­
riching the mixture.
T. Inlet connector
2. One-way valve
3. Spring
4. Shutter
5. Outlet opening
6. Solenoid valve
7. Outlet connector
Wiring connector
DIAGRAM SHOWING RECIRCULATION
OF GASES COMING FROM THE ENGINE
CRANKCASE (BLOW-BY)
This system controls the emission, from the
cylinder block/crankcase, of the breather
gases made up of air/petrol mixtures and
burnt gases which escape through the piston
ring seals, in addition to the lubricant oil
vapours, recirculating them to the inlet.
With the accelerator butterfly open, the gases
from the upper cover reach the main air intake
pipe through the pipe (1) which contains a
spark-out (5) to prevent combustion due to
flame returns from the butterfly casing (2).
With the accelerator butterfly closed (engine
idling), the vacuum in the inlet manifold
draws in the gases (in limited quantities) di­
rectly through the small pipe (4) and the cali­
brated port (3).
40
Print no. 506.670/76