Mitsubishi Evolution X. Manual — part 149
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
TSB Revision
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22B-9
WHEN DRIVING IN 1ST GEAR
During driving with the 1st gear, the even number
gear clutch is kept released, and the 2nd gear is
engaged in advance. (During driving with even num-
ber gears, the odd number gears are engaged in
advance.)
.
AC705588AC
Shift fork (For 2nd speed
gear-4th speed gear)
Clutch (For odd number gear)
Input shaft (for even number gear)
Shift fork (For 1st speed
gear-reverse speed gear)
Center differential
Output shaft
Transfer gear
2nd speed gear
1st speed gear
Input shaft (For odd number gear)
Even number gear axle
Odd number gear axle
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
TSB Revision
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22B-10
WHEN DRIVING IN 2ND GEAR
The clutch (for odd number gears) is released at the
shifting timing in accordance with the shift map, and
the clutch (for even number gears) is engaged to
perform driving with the 2nd gear.
Because the shifting is performed only by the alter-
nation of two clutches, the shifting time is short, and
the clutch does not become completely released dur-
ing driving.
AC705589 AC
2nd speed gear
Center differential
Clutch (for even number gear)
Input shaft (for even number gear)
To center differential
Shift fork (For 2nd speed
gear-4th speed gear)
Even number gear axle
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
TSB Revision
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22B-11
HYDRAULIC MECHANISM
M2224000500019
By the operation of solenoid valve, the valve body
feeds the hydraulic pressure needed for the opera-
tion of clutch and each shifting section. The solenoid
valve is controlled by TC-SST-ECU, and the hydrau-
lic pump generates the hydraulic pressure by using
the engine power.
Also, to prevent the oil performance drop, the oil
cooler and oil filter are equipped.
AC705353
Clutch
(For odd
number gear)
Hydraulic pressure valve body
Hydraulic pressure pump
TC-SST-ECU
2nd, 4th, 6th
shifting section
R,1st, 3rd, 5th
shifting section
AD
Engine
Clutch
(for even number gear)
AC705842AC
Oil cooler
Oil filter
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
TSB Revision
TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22B-12
CONTROL MECHANISM
M2224000600016
TC-SST-ECU communicates with various systems
(engine control module, shift lever, twin clutch SST
control mode switch, and others) to recognize the
driver operation, driving condition, malfunction of
systems, and others, and performs the correspond-
ing control of TC-SST assembly.
AC705196
Other ECUs (ASC,
ACD, AYC, etc.)
ETACS-ECU
ENGINE-ECU
TC-SST-ECU
AC
Sensor
Shift
actuator
Clutch
actuator
Engine
Clutch
TC-SST-assembly
Combination meter
Brake
pedal
Accelerator
pedal
Shift lever
Vehicle
speed, etc.
· Current gear
· Clutch temperature
· Fluid temperature
Gear shift
signal
Brake
ON, OFF
Current
gear
· Engine torque request
· Engine speed request
· Engine torque
· Engine Turning
· Clutch engagement
force
· Clutch engagement
speed
· Shift position
· Drive mode
CAN-C
CAN-B
Harness
Mechanical link
LIN
· Current gear
Sensor
Parking lock
mechanism
Current
gear
Name
Function content
TC-SST-ECU
• Incorporated into the TC-SST assembly. Controls the solenoid valve of valve
body based on the driver operations and signals from sensors and ECUs, and
performs the engagement and releasing of clutch as well as the gear shifting.
• By sending and receiving the information on engine torque, engine speed,
shifted gear, and others with the engine control module, performs the
integrated control of engine and TC-SST assembly.
Engine control module
By sending and receiving the information on engine torque, engine speed,
shifted gear, and others with TC-SST-ECU, performs the integrated control of
engine and TC-SST assembly.
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