CONVERTER LOCK-UP CLUTCH CONVERTER LOCK-UP CLUTCH (5-speed transmission) 2) 2) 1 2 3 4 1 2 3 4 Engine speed Input speed (turbine speed) Stator Figure A 7609A3PT22 5 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 clutc h 7 6 9 8 Figure B 7609A3PT23 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). 3-6