Hydrokinetic torque converter

Details Hydrokinetic torque converter Hydrokinetic torque converter

1994-10-28

1997-03-25

Pitts, Andrea L.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 33, 192103F, F16D 3300

Patent

active

056135823

ABSTRACT:
A hydrokinetic torque converter has a rotary housing which is connectable to the crankshaft or camshaft of a combustion engine in a motor vehicle to drive the input shaft of the transmission. The housing confines a turbine, a pump, a stator (if necessary) and a lockup clutch between a radially extending wall of the housing and the turbine. A piston of the lockup clutch is movable in the axial direction of the housing and defines a first fluid-filled compartment with the turbine as well as a second fluid-filled compartment with the wall of the housing. The force which is required to engage, to partially disengage or to fully disengage the lockup clutch is reduced by the provision of one or more profiles on the piston and/or on a friction disc of the lockup clutch which extends or extend into the adjacent compartment or compartments to influence the speed of circulation of fluids in the respective compartments and/or the fluid pressures acting upon opposite sides of the piston. This enables a control unit to predictably and reliably change the condition of the lockup clutch (from engaged to partially engaged (slipping) to fully disengaged or in the opposite direction) in response to relatively small changes of fluid pressure in the first or in the second compartment.

REFERENCES:
patent: 5456343 (1995-10-01), Murata et al.

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