Group
28
Ignition
systems
Design
and
function
-
Components
A
,
JD
B
c
JI
-
D
Control unit, power stage
and
ignition coil configurations
The
control unit. power
s
tage
and
ignition coil configuration
may take one of
four
different
forms
.
As
a general
rule
,
the
con
tro
l
unit delivers ignition pulses
to the
power stage
(which co
ntrols the
current in
the pri
.
mary w
in
ding
of
the
igni
tion
coil)
in response
to
signals from the various sensors and
pick-ups. A high
·
tension volt-
age is induced in
the
secondary and fed to the distributor,
wh
ich
delivers it
to the
appropriate spark
plug, generating
a
spark across
the
eleClrodes and igniting
the fuel
/
air mixture.
A
.
The
control
unit
,
power stage
and
ignition coil
may all be
separate components.
This app
l
ies to EZ
-
K
sys
t
ems.
B
. The
con
trol unit
and power stage may be
combi
ned
a
single
unit.
with a
separate ignition coil.
This applies to
TZ
·
28H
.
C
.
The
power
stage and ignition
may
be
com
b
ined,
with
the
con
trol
unit separate.
This applies to Rex-I.
O
.
The
control un
i
t
,
power
s
tage
and ignition
coil
may compr
is
e a single unit
.
TZ
-
28H
'control
does
inco
rpo
rate
a number of
Ci
r
CUits
additional
to those
used
i
n
s
lages
,
i
ls pr
i-
mary funct
ion is
closer 10 thaI of
a power
stage. and the term
'con
lr
ol
is
somewhat misleading.
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