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Volvo B 230 FT User Manual

Volvo B 230 FT
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Group
28
fgnition
systems
Design
and
function
-
System
descriptions
EZ-115K
EZ-115K
B280EIF
The
co
ntrol
unit
(1)
computes
the
optimum
timing
on
the
basis
of
information
from
the
various
sensors
and
delivers
an
ignition
pulse at
exactly
the
cor
rect ins
tant
to
the
power
stage (26).
which
responds
by
making
and
breaking
the
current
in
the
primary
winding
of
the
ignition
coil
(25). The
high-tension
cu
rrent
induced
in
the
secondary
winding
by
interruption
of
the
primary
current
is
fed
to th
e
distribut
or
(28)
for
delivery
to
the
appropriate
spark
plug
(29).
The
con
trol
unit
computes
the
timing
on
the
basis
of
the
following
information:
-
Engine
speed
and
crankshaft
position
signals
are
supplied
by
the
speed/
positi
on
pick-up
(2).
-
Engine
knock is
detected
by
the
knock
sensors
(7).
-
Ignition
in
NO
. 1
cylinder
is
indicated
by
the
No.1
cylinder
detector
(15).
-
Engine
load
signals
are
supplied
by
the
fuel
injection
system
control
unit
(19).
- Engine
temperature
is
indicated
by
th
e t
empera
ture
sensor
(23).
- Closure
of
the
throttle
is
ind
icated
by
the
throttle
switch
(2
4).
•
The
ignition pulse is interrupted by the control unit at a
speed
of approx.
6300
r/min.
•
Th
e control unit
can
vary the timing from approx.
60
° before
TDC
to approx. " . after
TD
C.
55

Table of Contents

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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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