Mitsubishi Galant (2004+). Manual — part 614
GENERAL DESCRIPTION
TSB Revision
AUTOMATIC TRANSAXLE
23A-7
ELECTRONICALLY-CONTROLLED SYSTEM
.
INVECS-II
• When in drive ("D" range), the new automatic transaxle
employs an innovative shift schedule to provide a high level
of comfort and "easy driving style" that matches all driving
conditions as well as the driver's driving style.
• INVECS-II features "Optimum Shift Control," which pro-
vides shift timing the average driver perceives to be the
optimum timing under any road conditions. "Adaptive Shift
Control" adjusts shift timing to match the driving habits and
preferences of individual drivers.
.
FEATURES
OPTIMUM SHIFT CONTROL
1. The shift patterns found satisfying by the typical driver for all
ranges of driving are stored in the computer's memory. The
computer uses this data to analyze road conditions and the
driver's style of operation, and then outputs the optimal shift
patterns stored in its memory to best match the conditions.
2. We introduce the latest control technologies with an innova-
tive new algorithm called the "neural network" that works to
imitate the decision-making processes of the human brain.
The neural network links a wide variety of input data regard-
ing road and operating conditions, and instantly makes
accurate shift control decisions.
.
AC000841AB
WITH INVECS-II
WITHOUT
INVECS-II
OPTIMUM SELECTION OF GEARS
LEVEL ROAD
ALL DRIVING CONDITIONS
DRIVER'S HABITS AND
PREFERENCE
AC000842
ACCELERATOR
POSITION
VEHICLE SPEED
FOOT BRAKE
OPTIMUM
GEAR
SELECTION
MANUAL SHIFT
OPERATION
DATA OF A
NUMBER
DRIVER'S
DECISION
ROAD
CONDITION
AND DRIVING
OPERATION
COMPUTER
OPTIMUM CONTROL
AB
AC000843
ACCELERATOR
POSITION
VEHICLE SPEED
FOOT BRAKE
OPTIMUM
GEAR
SELECTION
DATA
PROCESSED
INTERRE-
LATED
DECI-
SION
COMPUTER
NEURAL NETWORK
AB
GENERAL DESCRIPTION
TSB Revision
AUTOMATIC TRANSAXLE
23A-8
ADAPTIVE SHIFT CONTROL
1. The computer learns the driving habits and pref-
erences of each individual driver by processing
driving data on engine output, tire load, foot brake
operation, etc. It then uses this data to adjust shift
timing to best suit the driver's style.
2. If the computer determines from the driving pat-
terns that the driver is one who enjoys a relaxed,
unhurried style, it adjusts timing to execute
up-shifts at a lower engine speed to provide a
smooth, quiet ride. On the other hand, if the com-
puter determines the driver to prefer a sporty ride,
it adjusts timing to shift up at a higher engine
speed to provide more powerful response.
3. If the computer determines that the driver tends
to apply the brakes often on a descending road-
way, it adjusts timing to down shift sooner so that
engine braking is more effectively applied. Con-
versely, if the computer determines that the driver
does not brake much while driving downhill, it
delays downshifting to minimize the effect of
engine braking.
.
AC000844
DRIVER WHO PREFERS
RELAXING RIDE
DRIVER WHO PREFERS
SPORTIER RIDE
50 (31)
4TH
3RD
100 (62)
VEHICLE SPEED [km/h (mph)]
ADAPTIVE SHIFT CONTROL DURING ACCELERATION
AB
4TH
3RD
AC000845
DRIVER WHO PRESSES
BRAKE PEDAL OFTEN
AVERAGE DRIVER
4TH
3RD
ADAPTIVE SHIFT CONTROL ON DOWNGRADES
AB
4TH
3RD
4TH
4TH
4TH
4TH
3RD
2ND
DRIVER WHO RARELY
PRESSES THE BRAKE
CONVENTIONAL A/T (NO DOWN SHIFT)
NEW A/T WITH
INVECS-II
GENERAL DESCRIPTION
TSB Revision
AUTOMATIC TRANSAXLE
23A-9
SYSTEM CONSTRUCTION DIAGRAM
Powertrain control module (PCM)
Ignition switch
Input shaft speed sensor
Output shaft speed sensor
Crankshaft position sensor
Throttle position sensor
A/T fluid temperature sensor
Park/Neutral position switch
Dual pressure switch
Stoplight switch
Cruise control unit (OD OFF Signal)
Select switch
<Vehicles with sport mode>
Shift switch (up, down)
<Vehicles with sport mode>
Scan tool (MUT-II)
Serial communication
A/T control relay
Torque converter clutch solenoid valve
Low-reverse solenoid valve
Second solenoid valve
Underdrive solenoid valve
Overdrive solenoid valve
Fail-safe operation
("N" range light flashing)
<Vehicles with sport mode>
SENSE
DECIDE
ACT
AC102750
Transmission fluid temperature sensor
Transmission range switch
AE
Scan tool (MUT-III)
Fail-safe operation
(''N'' range light flashing)
GENERAL DESCRIPTION
TSB Revision
AUTOMATIC TRANSAXLE
23A-10
SHIFT PATTERN CONTROL
.
UPSHIFT PATTERN <F4A4B>
NOTE: Within 2 -to- 3 and 3 -to- 4 movement ranges, the PCM adjusts shift points according to the driving
conditions by memorizing the accelerator pedal stroke and braking timing.
.
DOWNSHIFT PATTERN <F4A4B>
.
AC306491
50
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
100
0.5
1.0
2.0
3.0
4.0
4.5
0 (0)
50 (31)
100 (62)
150 (93)
200 (124)
THROTTLE
OPENING
VOLTAGE (V)
THROTTLE
OPENING (%)
VEHICLE SPEED km/h (mph)
OUTPUT SHAFT SPEED r/min
AC
1
2
2
3
3
4
THICK LINE: STANDARD SHIFT PATTERN
2 3
MOVEMENT
RANGE
3 4
MOVEMENT
RANGE
AC306492
50
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
100
0.5
1.0
2.0
3.0
4.0
4.5
0 (0)
50 (31)
100 (62)
150 (93)
200 (124)
THROTTLE
OPENING
VOLTAGE (V)
THROTTLE
OPENING (%)
VEHICLE SPEED km/h (mph)
OUTPUT SHAFT SPEED r/min
AB
1
2
1
2 (L)
2
3
2
3 (L, 2)
3
4 (L, 2, 3)
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