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Volvo B 230 FT User Manual

Volvo B 230 FT
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Group
28
Ignition
systems
Design
and
function
-
Overview
Review
of
electronic
ignition
systems
-
II
(Type
EZ-K
and
Rex-I)
A B
C 0 E F G
H
~
~
Ud'"
--
tJJ
EZ-
I
'
\..~
['\l
.
~
~
(3P
G
102K
u-
1m
I
/'~
~
~
'"
~
(jf
EZ-
\'
\
~
~
0
117K
~
l
...
. "
U-"
~
,
($
~
r.v
~
0
~
q
EZ-
~
)
~
118K
~
]I
~
n,
q
EZ-
/'
b
~
a
115K
~
&,
u:.-'
EZ-
[ij
0
~
b
~
CJ
a
d
116K
('
-$
~
iii
QJ
q
REX-
\J
b
I
~
,
')
I
141071
The
illustration
shows
the
main
components
of
type
EZ
-K
and
Aex-I
ignition
systems
.
Common
features
:
An
abbreviation
of
the
German
term
Elektronischer
Zundung
mit K
lo
pfregulung
(roughly,
'
Electronic
ignition
with
knock
sensor
')
the
designat
io
n EZ-K describes a
group
of
systems
manufactured
by
the
Bosch
company.
The
various
systems
in
the
EZ-K
group
are relati
vely
similar
in
terms
of
functions
and
components.
All
feature
microprocessor
control
and
inco
rporate
a
memory
which
is
programmed
with
a
family
of
ideal
timing
curves
for
the
particular
en-
gine. Each
system
also
includes
a
sensor
which
detects
engine
knock
and
retards
the
ignition
in
respon
se
to
a
mem
-
ory
program
which
is
indiv
idu
al
to
each
cylinder.
This
means
that
the
timing
in each
cylinder
may
vary at
any
given
instant.
As
column
E indicates,
systems
in
this
group
are
normally
supplied
w i
th
engine
load
information
by
an
air
mass
meter
located in
the
in
take
system. A
measure
of
the
quantity
of
air
supplied
to
the
engine
,
the
air
mass
meter
signal
is
transmitted
to
the
LH-Jetron
ic
control
un
it (in
which
it is
converted
and used
to
determine
the
quantity
of
fuel
to
be
injected)
and
then
to
the
ignition
system
control
un
it.
Differences
Within
the
EZ
-K
group,
the
individual
systems
are
distinguished
by
t
he
timing
curves
used
for
different
engine
var
-
iants,
by
whether
a Hall
generator
or
inductive
speed/
position
pick-up is used,
and
by
when
the
ignition
compensa-
tion
functions
are activated.
6

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Volvo B 230 FT Specifications

General IconGeneral
Engine TypeInline 4-cylinder
Fuel SystemElectronic Fuel Injection
Cylinder Bore96 mm
Piston Stroke80 mm
TurbochargerYes
Displacement2.3 L (2316 cc)
ValvetrainSOHC, 8-valve

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