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DASH
POT
Automatic
transmission models
The dash
pot
is attached
to
the
throttle chamber
The dash
pot
pre
vents
the throttle valve from
closing
abruptly
and thus stalls the
engine
The
throttle valve
will
gradually
reo
turn
to
the
idle
opening
position
during
deceleration
ELECTRICAL SIGNAL
SYSTEM
WATER TEMPERATURE
SENSOR
The
water
temperature
sensor
built
into
the
thermostat housing
monitors
change
in
cooling
water
temperature
and
transmits
a
signal
for
the
fuel
enrichment
to
change
the
pulse
dura
tion
during
the
wann
up
period
I
The
temperature sensing
unit
em
ploys
a
thermistor which
is
very
sensi
tive
in the low
temperature
range
The electrical resistance of the ther
mistor decreases
in response
to
the
water
temperature
rise
AIR
TEMPERATURE SENSOR
The
air
temperature
sensor
buHt
into
the
air
flow
meter
monitors
change
in
the
intake air
temperature
and
transmits
a
signal
for the fuel
enrichment
to
change
the
pulse
dura
tion
The
temperature sensing
unit
em
ploys
a
thermistor which
is very sensi
tive
in the low
temperature
range
The electrical
resistance
of the ther
istor
decreases
in
response
to the air
temperature
rise
THROTTLE VALVE
SWITCH
The throttle valve switch
is
attach
ed
to
the throttle chamber and
ac
tuates in
response
to
accelerator
pedal
movement
This switch has
two
sets
of
contact
points
One
set
monitors
the idle
position
and the other
set
monitors full throttle
position
EN
GIN
E
FU
EL
EFI System Component
Parts
Construction
and
Function
WATER TEMPERATURE
SENSOR
q
AIR
TEMPERATURE
SENSOR
Air
temperature
sensor
SEF101
Idl
contact
The
idle
contact
closes when the
throttle valve
is
positioned
at
idle and
opens
when
it is at any
other
position
The
idle
contact
compensates
for
idle
wann
up
and after idle
en
richment and sends the fuel shut off
signal
Full throttle contact
The full throttle
contact
closes
only
when the throttle valve
is
positioned
at
full throttle
more
than
45
degree
opening
of the throttle valve
The
contact is open
while the throttle valve
is at any
other
position
The full
contact
compensates for
full enrichment
Dash pot
Air
Throttle
passage
lever
Throttle
h
L
valve
J
SEF105
CHARACTERISTICS CURVE
I
I
11
4
kn
at
IOoC
l40F
30
I
20
7 0
10
8
6
4
I
2 1
2 9 Jen
at
200C
c
3
680F
I
J
8
2
0 68
1
00
kn
I
0
I
t
SOOC
1220
1
I
0
6
I
1
0
06
L
30
20
0
20
40
60
80
22
4
32
68
104 140 176
Temperature Oc OF
0
4
0
31
0 2
Full throttle
contact
SEF108
EF
15
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