CITROEN CX Series - Page 375

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B. THERMAL SENSOR
This is
situated in the duct linking
the
air
filter to
the carburettor
(
see
diagram below
).
Depending on
the temperature
of
the
inlet
air,
it
allows
or not vacuum to
reach the
control capsule
for
the
flap and
the closing plate.
It
consists of a number of valves ond bi-metallic strips.
Operating.principle
For
an
inlet air temperature
below
60
0,
the
position of
the
bi-metallic strips
and the
valves is such that vacuum
in
the
inlet manif
old is communicated
to
the
capsule (see para.
A, diagram No.
1
For an
inlet air temperature
above
190
C,
the
bi-rnetallic
strips
change
shape. and the
position of
the valves
stops
the
vacuum
from
reaching the capsule
(
see para
A. diagram No.2
).
For
an
inlet air temperature
between
6 and
190
0,
the
positions of valves and
bi-metallic
strips allow
the
action of
the vacuum
on the
capsule
to
be regulated.
In
this case, the
flap
and the
closing plate are
in an intermediate
position
allowing
simultaneoussupply
of warm
and cold air.
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