Hyundai HL955 Manual page 57

2) 2)
CONVERTER LOCK-UP CLUTCH (5-speed transmission) CONVERTER LOCK-UP CLUTCH
1 2 3 4
1 Converter lock-up clutch
2 Turbine wheel
3 Stator
4 Circuit cover/pump wheel
5 Proportional valve
6 Measuring point "Lock-up clutch"
7 Cover
8 System pressure to lock-up clutch valve
9 System pressure from lock-up clutch valve
to lock-up clutch
With closed converter lock-up clutch the slip between pump and turbine wheel and consequently the
hydraulic loss in the converter is equal to "zero" (see figure A).
According to the turbine speed the converter lock-up clutch is shifted automatically.
Via a proportional valve the pilot pressure is applied to the actuating piston, which compresses the disc
set (see figure B, lock-up clutch valve).
1 2 3 4
Figure A
7
9
3-6
Engine speed
Input speed (turbine speed)
Stator
7609A3PT22
5
6
8
Figure B
7609A3PT23