14A
-
1
ANTIPOLLUTION
Petrol vapour rebreathing: Operation
K7J or K7M, and 710
14A
I -OPERATING DIAGRAM OF THE CIRCUIT
II - OPERATING PRINCIPLE
The tank is vented by means of the fuel vapour absor-
ber.
Fuel vapour is trapped by the active charcoal contained
in the absorber as it passes through.
Fuel vapour trapped in the absorber is eliminated and
burnt by the engine.
To do this, the fuel vapour absorber and inlet manifold
are connected via the solenoid valve. This solenoid val-
ve is integrated in the fuel vapour absorber.
The principle behind the solenoid valve is to open a
passage of variable size (according to the opening cy-
clic ratio signal sent by the injection computer).
The variation in the passage opened for fuel vapour in
the solenoid valve results from the balance between
the magnetic field created by the supply to the winding
and the return spring force attempting to close the so-
lenoid valve.
97393
(1)
Tank
(2)
Fuel vapour absorber
(3)
Fuel vapour absorber bleed
solenoid valve
(4)
Intake manifold
(5)
Breather
(6)
Recirculation of fuel vapour from
the tank
(7)
Rebreathing of fuel vapours
going to the engine
1
5
4
3
2
6
7
108415
7
6
5
2
3
