Group 28 Ignition systems
Design and
fun
c
t
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
revolution
of
the
shaft.
speed/position pick-ups are
used
on
EZ-115K. EZ
-
t
16K and Rex-I
systems
.
When
in
the
vicinity of the
flywheel.
must
to
avoid striking
the p
ick-u
p w
i
th tools
or
d
isma
ntled
co
mpo
-
nents
.
The accuracy and
of the
signal is
dependent
on maintaining
the
gap
I
t
between
the tip
and
t
he
toothed
profile for which
the
devi
c
e is
designed. In addition.
the
mu
s
t
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 eng
ines.
it is possible to replace the component in the
wrong
thereby
alter
i
ng the
timing
.
The tim
i
ng will
be
altered
approx.
3"
if
the pick·up
leads
are
reversed
.
•
the
magn
i
tude
of the
ind
uced
voltage
increase with flywheel speed
,
the
voltage
regulator in
the
con
trol
unit en-
sures
that
the voltage supplied
to the
Ie ci
rcu
its
remains
cons
ta
n
t
.
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