Supplement to Manual 818.1 ADD
'"'
,-.
U2.
'-'
(](y
OPERATION
N° MA.IE.
144-00
Characteristics
oj the « L.Jetronic
»
electronic
Op. MA.IE.
144-00
5
joel
injection system
AIR
INLET
SYSTEM
Air drawn
in via
air
filter
(1)
passes
through
the air-flow
sensor
(2'),
via
butterfly (3) and
arrives in
the
inlet
distribution chamber, each
pipe of which
(4) leeds
to
a
cylinder.
Each
cylinder
has an electro-rnagnetic
injector which is located very close to
the
inlet valve
in order to improve
engine
performance.
The
supplementary
air
coritrol (6)
is located in
parallel
with the
butterfly,
and supplies the
supplementary air
required
by
the
engine
to
run smoothly
when
cold,
Once the engine has reached
its
normal running temperature,
the idling
speed
air-flow
is provided
by
a by-pass
valve
(5)
which by-passes the
butterfly
as
welL
It is important that the system be
ir-tight do*nstream from the air-flow sensor,
sa
that
no
«
secondar
»
air can
o
be
drawn
in, which
would
falsify
the nir-volume reading.
0
z
c
0
0.
Q.
'1,
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