Group
28
Ignition
systems
Design
and
funct
ion
-
Speed
and
crankshaft
position
information
Advantages
Ignition
systems
employ
ing
induc
tive
speed/position
pick-ups
(or
pulse
generators
as
they
are
also
known)
provide
more
accurate
speed
and
crankshaft
position
signals
than
th
ose
equipped
w i
th
Hal
l
generators
-
due
to
the
fact
that
t
he
former
have
fewer
mechan
ic
al
components
(
which
are
invariably
subject
to
some
degree
of
play)
and
that
a
crankshaft
position
signal
is
generated
on
each
revolution
of
the
shaft.
~
Inductive
speed/position pick-ups are used
on
Reni)c
-F. EZ-115K.
EZ
-t 16K
and
Rex-I systems.
• When work.ing in the
vicinity
of
the
flywheel. care
must
be
taken
to
avoid striking the pick-up w ith
tools
or
d
isma
ntled
co
mpo
-
nents. The accuracy
and
reliability
of
the
signal is dependent
on
maintaining
the
gap
It :10.5
mmf
between the
tip
and
the
toothed
profile
for
which
the device is designed. In addition. the pick-up
mu
st
be
mounted
at right-angles to the profite.
~
The greatest care
must
be taken
when
replacing the flywheel/carrier plate
if
the
component
has been
dismantled
(e.g. as
part
of
gearbox replacement). On 4-c
ylinder
engines. it is possible
to
replace the
component
in the
wrong
position. thereby altering the
timing
.
• The
tim
i
ng
will
be
altered
by
approx. 3"
if
the
pick·up
leads are reversed.
•
AlthOllgh
the
magn
i
tude
of
the
ind
uced voltage
wilt
increase
with
flywheel
speed, the voltage
regulator
in
the
con
trol
unit
en-
sures
that
the
voltage
supplied
to
the
Ie
circuits remains constant.
23
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