1990 MITSUBISHI ECLIPSE fuel

AUTOMATIC TRANSAXLE - Torque Converter
TORQUE CONVERTER
Lock
ring
I
Damper
F
clutch-
B-.Turbine
.AA
/:ront cover
h,Impeller
AStartorWhen damper clutch is
I\When damper
aInput shaftactivated
clutch isactivated
175202The torque-converter is composed of the impeller
(rear cover), turbine,
stator, damper clutch, one-way
clutch, front cover, etc.Furthermore. the torque-converter cannot be dis-
assembled because the outer circumference of the
shell
(front cover and rear cover) is sealed by
welding.
Because the torque-converter is coupled to the
engine’s crankshaft (via the drive plate). the shell
(front cover and impeller) always turns in the same
way when the engine is running.
As a result, the oil pump is also caused to rotate (by
the hub welded to the center part of the rear of the
shell) at the same speed as the engine.
The boss at the front part of the shell is inserted in
the hole at the rear part of the crankshaft. thus
providing support of the torque-converter.
A facing like that attached to the transaxle’s clutch
disc is attached to the damper clutch, and the
damper clutch and the turbine are connected by the
tabs (of the lock ring on the outer circumference of
the turbine shell) that fit into the groove on the outer
circumference of the damper clutch.
The torque-converter actuation hydraulic pressure,at the damper clutch activation area, passes be-
tween the torque-converter’s hub and the reaction
shaft, and enters the torque-converter.
When this happens, the hydraulic pressure acts
upon the A part (between the damper clutch and the
turbine), with the result that the damper clutch is
pressed against the front cover, and the damper
clutch, with a slight slip (as described later) becom-
es connected.
In this manner, the amount of slippage of the
torque-convener is reduced, without a damper
spring, to far below at even the low-speed level,
thus making a practical improvement of fuel con-
sumption.
At the damper clutch non-activation area, because
the torque-converter actuation hydraulic pressure
passes through the input shaft oil passage
-1enters the torque-converter from the
B part &-tween the damper clutch and the front cover). the
damper clutch moves away from the front
cover,thus releasing the damper clutch.
In this condition, operation is as an ordinary torque-
converter.

21-50AUTOMATIC TRANSAXLE - Transaxle Control
Vehicle
sensorspeedTerminal voltage
(VI
1
5
\*Fluidtemperature
02080PCI 1750409VEHICLE-SPEED SENSOR
The vehicle-speed sensor is the transistor open collector type;
it generates pulse signals (four pulse signals for each rotation
of the gear) that are proportional to the rotational speed of the
transaxle’s output gear (and therefore proportional to the
vehicle speed) and sends these signals to the transaxle control
unit. This sensor is installed in the speedometer.
AIR CONDlTlONER RELAY
In order to adjust the improper correspondence between the
engine output and throttle valve opening that is caused by an
air conditioner load, the transaxle control unit corrects the
solenoid drive duty when an on-signal from the air conditioner
relay is detected.
OIL TEMPERATURE SENSOR
The oil temperature sensor is of the thermister type,
an+senses the automatic transaxle fluid temperature.
Using the signal from this sensor, the transaxle control unit
corrects the solenoid drive duty when the transaxle is cold.
The sensor output characteristics areindicated on the graph at
the left.
POWER/ECONOMY SELECT SWITCH
This switch permits the driver to intentionally select either shift
pattern.
The power pattern is designed for use when high power
‘*needed, when driving on mountain roads, or when acceleratirl,
to pass other vehicles at high speed.
The economy pattern is designed for ordinan/ driving.
ltprovides good fuel economy and quiet operating conditions.

/E 7_.___-__----_BODY
- Main Body23-7Material
IhPan name
1Front door beltline reinforcement,
outer
2Front door, outer, rear3Front door, inner, rear4 Front fender bracket
5Cowl top panel, outer6Cowl top panel. inner7Front upper extension, inner
8 Roof drip channel
9Rear wheelhouse front extension
10 Roof drip channel extension
11 Rear pillar. outer
12 Fuel filler neck bracket
13 Fuel filler door panel
14 Quarter outer lower extension
15 Rear lamp housing extension
16 Dash panel
17Front floor side sill. inner, front
18 Dash panel extension
19 Dash panel crossmember
20 Front floor sidemember
21Front floor side sill, inner
22 Front floor sidemember extension
23 Rear seat pan
24 Rear end panel,
outer25 Rear fascia upper bracket
26 Front end upper bar reinforcement
27 Turn lamp bracket
Fender support plate
Sidemember to crossmember brace
30 Headlamp support panel
31 Oil cooler bracket
32 Front end upper bar
33 Shield plate
34 Front upper frame, inner
35 Front upper frame, lower
36 Front upper frame, outer
37 Rear floor side sill reinforcement
SGACCIO.Part name
38 Roof panel (for sun roof)
39 Front door inner panel
10 Hood panel, inner
11 Front fender panel
12 Tailgate panel, outer, upper13 Tailgate panel. inner14 Front floor side sill. outer
15 Rear wheelhouse, inner
16 Quaner panel, outer17 Quarter panel, inner, lower18 Rear lamp housing
19 Front floor pan50 Rear end panel, inner
51 Front fender shield
52 Rear floor side sill
63 Center pillar, outer
64 Spring house panel
65 Backbone rear reinforcement
66 Rear floor
crossmember. lower
67 Rear floor pan
68 Strut house panel
69 Rear floor sidemember reinforcement
70 Rear floor sidemember
71 Front sidemember, rear
72 Bumper bracket
73 Front
sidemember. inner
74 Front sidemember rear reinforcement
75 Lateral rod bracket
76
ITrailing arm bracket
53 Rear seat crossmember
54 Rear floor crossmember reinforcement
55Rear floor seat belt reinforcement56 Jack up reinforcement
57 Radiator bracket
58 Front tie down bracket. inner
59Rear floor sidemember front bulkhead
60Rear floor sidemember rear bulkhead61Rear floor sidemember centerreinforcement77 Front door panel, outer
78 Hood panel, outer
79 Tailgate panel, outer, lower
80 Front pillar, inner, upper(B)
81 Front pillar, outer, upper
82 Front pillar, outer lower
83 Front upper frame extension, outer
84 Lateral rod reinforcement
85 Sidemember seat belt reinforcement
86 Rear floor sidemember extension
SGAHC87 Front pillar, inner, upper (A)
88 Front pillar, inner, lower
89 Spare tire bracket
62 Rear tie down reinforcement
i
l SGACC%;k; 3 Gaivannealed steel plate
;E;;E I SPHC, SPCD or SPCE plated with an electrical zinc-nickel alloy
SPRC: Phosphorus added
SENC35R: SPRC35R with electrogalvanized zink-nickel CoatingSGAC35R:
Phosporus added (also galvannealed)‘he numbers in the material codes indicate the tensile strengthMaterial
SGACE
SENCE
SENHC
SENC35R
SENPH38
SGAC35R
SPRC35

BODY - Main Bodv23-9
No.Part name
1Front door beltline reinforcement,
outer
2Front door, outer, rear3Front door, inner, rear4 Front fender bracket
5 Roof drip channel
6Rear wheelhouse front extension7Roof drip channel extension8 Rear pillar, outer
9Fuel filler neck bracket10 Rear lamp housing extension
11Quarter outer lower extension
12 Fuel filler door panel
13 Front upper frame extension, inner
14 Dash panel crossmember
15 Dash panel extension
16 Front floor side sill, inner, front
17 Dash panel
18 Front floor sidemember
19 Front floor side sill, inner
20 Rear seat crossmember
21 Rear seat pan
22 Rear end crossmember
23 Child restraint reinforcement
24 Rear fascia upper bracket
25 Rear end panel, outer
26 Oil cooler bracket
27 Headlamp support panel
28 Sidemember to crossmember brace
29 Fender support plate
30 Turn lamp bracket
31Front end upper bar32Front end upper bar reinforcement33 Front upper frame, outer
34 Front upper frame, lower
35 Front upper frame, inner
36 Shield plate
37 Rear floor side sill reinforcementMaterial
No.Part name
44 Front door panel, inner
45 Roof panel (for sun roof)
46 Hood panel, inner
47 Front fender panel
48 Tailgate panel, outer. upper
49 Tailgate panel, inner
50 Front floor side sill. outer
51 Quarter panel, inner, lower
52 Rear wheelhouse, inner
53 Quarter panel, outer
54 Rear lamp housing
55 Cowl top panel, outer
56 Cowl top panel, inner
57 Front floor pan
58 Rear end panel, inner
59 Front fender shield
60 Rear floor side sill
SGACC61 Spring house panel
62 Center pillar, outer
63 Backbone rear reinforcement
64 Propeller shaft rear bracket
65 Rear floor crossmember. lower
66 Rear floor pan
67 Strut house panel
68 Rear floor sidemember front
extension
69 Rear floor sidemember
70 Differential mount bulkhead
7 1 Front sidemember. rear
72 Rear floor sidemember reinforcement
38 Radiator bracket
39 Front tie down bracket, inner
40 Rear tie down reinforcement
41
’ Rear floor seat belt reinforcement42Rear floor sidemember front bulkhead43Rear floor sidemember rear bulkhead
F
SGAHC73 Front door panel, outer
74 Hood panel, outer
75 Tailgate panel, outer, lower
76 Front pillar, inner, upper(B)
77 Front pillar, outer, upper
78 Front pillar, outer, lower
79 Front upper frame extension, outer
80 Sidemember seat belt reinforcement81Rear floor sidemember extension82 Bumper bracket
83 Front sidemember. inner
84 Front sidemember rear reinforcement
85 (Front pillar. inner, upper (A)86 Front pillar, inner, lower
87 Spare tire bracket
x::-SGAHC-I-Galvannealed steel plate
E% x--
SPHC. SPCD or SPCE plated with an electrical zinc-nickel alloy
SPRC: Phosphorus added
SENC35R: SPRC35R with electrogalvanized zink-nickel coating
SGAC35R: Phosporus added (also galvanneafed)The numbers in the material codes indicate the tensile strengthMaterial
SGACE
SENCE
SENHC
SENHE
AGSC35R
SENC35R
SPRC35

25-1
EMISSION
CONTROL SYSTEMSCONTENTS
RZSA---AIR-FUEL MIXTURE
RATIOCONTROL SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . .._.................9CATALYTIC CONVERTER
. . . . . . . . . . . . . . . . . .._............9CRANKCASE VENTlLATlON SYSTEM
. . . . . . . . . . . .10EVAPORATIVE EMISSION
CONTROL SYSTEM
: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..-.........11Canister
. . . . . . . . . . . . . . . . . . . . . . . . . . . ..~...................._._...__..12
FuelCheck Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.........14
FuelFiller Cap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..__....._..14Overfill Limiter (Two-way Valve)
_................... 14
Purge Control Solenoid Valve

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Purge Control Solenoid Valve

. . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Purge Control Valve
. . . . . . . . . . . . . . . . . . . . . . . .13EXHAUST GAS RECIRCULATION
(EGR) SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..-......5
EGR Control Solenoid Valve . . . .8EGR Control Valve
..,.........................................7EGR Temperature Sensor
. . . . . . . .8Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Operation . . .._.........................._.._... _.5
Therm0 Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._.7GENERAL INFORMATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

25-2EMISSION CONTROL SYSTEMS - General Information
GENERAL INFORMATION
There are three sources of vehicle exhaust emis-
sions generated: the exhaust gases resulting from
combustion, the blow-by gases generated within
the crankcase, and the evaporative emissions
generated from the fuel tank and other components
of the fuel line.
The emissions-control system, which is designed to
control the discharge of these exhaust gases into
the atmosphere, is composed of the following
system components.
(1) Exhaust emission control system
(2) Crankcase emission control system
(3) Evaporative emission control system
R258A’The exhaust emissions-control system reduces the
amount of carbon monoxide, hydro carbon and
oxides of nitrogen in the exhaust gases by adding
the exhaust gas recirculation device and the cataly-
tic converter to fundamental improvements such as
improvement of the combustion chamber and the
camshaft, as well as other improvements to the
engine such as feedback control of the air/fuel ratio
by the electronically controlled fuel injection sys-
tem.
The crankcase emissions-control system is a closed
type so that blow-by gases are not discharged out to
the atmosphere. The evaporative emissions-control
system is the canister type; vapors that are gener-
ated within the fuel tank are introduced into the
intake manifold and are combusted so that they are
not emitted out to the atmosphere.
Non-Turbo for Federal
Air
cleaner
\solenoid
valve
Catalytic converter
:
0
$2:) Canister:.:

25-1
Eh/llSSlON
CONTROL SYSTEMS
rps*---
AIR-FUEL MIXTURE RATIO
_ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CATALYTIC CONVERTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
._ _.__.____.
EVAPORATIVE EMISSION
: . . . . . . . . . . . . . . .._............. _ _.I.........
Canister . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . . . . . ..-..
Fuel Check Valve . . .._......._....._......__...._.__.............
Fuel Filler CapI.........._........................................
Overfill Limiter (Two-way Valve)_......._._.._._....
Purge Control Solenoid Valve
.._. _...
9
_..._............................................... 5
EGR Control Solenoid Valve . . . . 8
EGR Control Valve . . . . . . . . . . . . . . .._........................... 7
EGR Temperature Sensor . . . . . . . . 8
.._................ 6
Operation . . . . . . . .._._..................._..__.__. 5
Therm0 Valv e. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._. 7
GENERAL INFORMATIO N. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

--.
25-2EMISSION CONTROL SYSTEMS - General Information
GENERAL INFORMATION
There are three sources of vehicle exhaust emis-
sions generated: the exhaust gases resulting from
combustion, the blow-by gases generated within
the crankcase, and the evaporative emissions
generated from the fuel tank and other components
of the fuel line.
The emissions-control system, which is designed to
control the discharge of these exhaust gases into
the atmosphere,is composed of the following
system components.
(1) Exhaust emission control system
(2) Crankcase emission control system
(3) Evaporative emission control system
RZSBAThe exhaust emissions-control system reduces the
amount of carbon monoxide, hydro carbon and
oxides of nitrogen in the exhaust gases by adding
the exhaust gas recirculation device and the cataly-
tic converter to fundamental improvements such as
improvement of the combustion chamber and the
camshaft, as well as other improvements to the
engine such as feedback control of the air/fuel ratio
by the electronically controlled fuel injection sys-
tem.
The crankcase emissions-control system is a closed
type so that blow-by gases are not discharged out to
the atmosphere. The evaporative emissions-control
system is the canister type; vapors that are gener-
ated within the fuel tank are introduced into the
intake manifold and are combusted so that they are
not emitted out to the atmosphere.
Non-Turbo for Federal
.;. :
0
.%??? CanisterAir
cleaner
\valveOxygenFuel tank
-a I”’ ,T
sensr’
Catalytic converter
6EMO?O2