Volvo 819 E Service Manual page 7

of
electronic ignition
TSZ: An electronic ignition
tems is carried out by an
Transistor Spolen lundung - means
'control unit' which regulates
baltast resistor. Designated
1982 to 1986.
TZ·28H:
As the designation
used
by the 'control unit'
varies the timing with engine load
was almost completely superseded by other systems in
like other systems discussed
group transistorized systems.)
of
The name is a
a
coil comprise single unit.
.
•
usually denote the verSion and/or variant desig nation
systems - I
system in which the
inductive pulse generator.
'Transisto
the coil charging
TSl-4, the variant for 6-cylinder
indicates, this is a transistorized
to control the pri mary current
. Although the
in this con text, TZ-28H is not fully electronic; indeed. it is usually regarded
trademark of the Bendix
Since '985, Renix-F has been used on 7405
the var ious sy
function performed by
(Roughly translated, the abbreviation TSZ
rized coil ignition'.) The pulse generator signals are
period. Th e system also
engines (B28A1EiF)
system employing
i n the ignition coil.
system was used on some
1985 as the new
company. In this system
stems are usually derived
.
28
Group
Design and function
contact breaker points in
inco rporate s a cen t rifugal
was used on 700
a Hall generator
vacuum advance un
A
700 series models
family of engines entered
, the control unit. power
equi pped with the B 200 K engine and Salex
fro m the maker's native
Ignition systems
conventional sys-
- which stands for
transmitted to a
generator and a
series cars from
to supply the signals
it on the distributor
produced in 1984, it
production. (Un-
as one of the
stage and ignition
language. wh ile the fig -
5