Fiat 1998 Marea Weekend, Service Manual

Page: 254 / 846

Engine
Fuel system
Marea- Marea Weekend ft
99 range
10.
1
2
Charcoal filter solenoid valve
The function of this valve is to control the
quantity of fuel vapours drawn in by the active
charcoal filtr and directed to the inlet manifold
which is achieved by means of the injec-
tion/ignition electronic control unit.
If this valve is not supplied, it is closed, pre-
venting the fuel vapours from excessively en-
riching the mixture.
1. Inlet connector
2. Single-acting valve
3. Spring
4. Shutter
5. Outlet port
6. Electro-magnet
7. Outlet connector
Connector wiring
6
+30
3 4 B
4F040PJ02
DIAGRAM SHOWING EXCHANGE OF
GASES COMING FROM THE CYLINDER
BLOCK/CRANKCASE (BLOW-BY)
This system controls the emission, from the
cylinder block/crankcase, of breather gases
consisting of air/petrol mixtures and burnt
gases which escape from the piston seals, in
addition to lubricant oil vapours, recirculating
them to the inlet.
With the accelerator butterfly open, the gases
from the upper cover reach the main air inlet
pipe through the pipe (1) which contains a
flame damper (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) directly
through the small pipe (4) and the calibrated
port (3).
40
Print n° 506.763/14