CITROEN CX Series - Page 360

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OPERATION N° MA.
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IV. DISTRIBUTION FLAP
(Vi)
CONTROL
Flap V 1
is controlled
by
C
1.
It
is controlled
pneumotically
by
vocuurr
The vacuum
intake
is at the carburettor
The
flap
is controlled
by
a
pneumatic
piston subjected
to
vocuum
via
a
switch.
When
control C
1
is
positioned
between the
small
blue
square and the
red
square the
piston in
the
switch is 1ff
ted
(
fiq. A
)
)
vacuum
intake
is
cut
off: the supply
pipe
to the pneumatic
piston is ot atmospheric
pressure
flop V 1 blanks
off intake E
2,
ond
air drawn
into the
intake
on
the
bonnet
comes from
outside
With
the engine
runninu
ond control
C 1 positioned
between
both blue
squares
(
fiq.
(
8
) )
the
piston
in
the
switch
comes down under the action
of its spring. supply
pipe to
the
pneurnatic
piston is no
lonqer
under
atmospheric pressure.
but
under the
action
of
the
vacuum,, and
flap
V
1
via
the
pneumatic
piston blonks
off
intake E
1 the
air drawn
in comes
from
the passenger
campartment,
recycling
position
).
NOTE
Identification
mark
for fittinq the
one woy valve the
outer
diameter
is reduced
on
the
side of
the
3way union.
V.
FAST IDLING SPEED
CONTROL
This cantrol
allows
for a faster
idling speed when
the
compressor is
operatinq
A vacuum
capsule
incorporated
in
the
carburettor
slightly opens the
first
choke
butterfly
by
means
of
a small
rod.
The
amount
of
opening is adjustable
by
ineans
of a screw
on
top of
the vacuum
capsule.
An
electro-valve
fitted
to the
RH.
side
of
the
front subfrarne
ond
supplied at the
same time
as
the electromaqnetic
clutch for the
compressor. controls the
supply
of vacuum
to the
capsule.
FRONT
Vacuum
intake
-
Towards flap V
1
1
Action of
vacuum
Ju
I
in
position
rr
Carburettor
Elect
valve
Vacuunl
capsule
va1ve
1
Pneumcitic
pi
Vacuum
switch
Red
Blue
u
Blue
cl
- - -
-
Atmospheric pressure
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