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Torque-converter-having-a-continuous-slip-bypass-clutch-with-multiple-friction-plates

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Torque converter having a continuous slip bypass clutch with multiple friction plates

Details

Inventors: Kirkwood, Malcolm E.;
Assignee: Borg-Warner Automotive, Inc. (Sterling Heights, MI)
Primary Examiner: Bonck; Rodney H.
Assistant Examiner: Pitts; Andrea
Attorney, Agent or Firm: Reising, Ethington

A torque converter has a continuous slip bypass clutch with multiple friction plates one of which is directly coupled to the inside diameter of the front cover of the torque converter and another of which is directly coupled to a hub connected to the output shaft of the converter and wherein the bypass clutch is activated when there is excessive torque converter slip so as to engage plural friction surfaces on the multiple friction plates for providing a heat resistant slip connection between the front cover and the output shaft.

DETAILED DESCRIPTION What is claimed is: 1.
In a torque converter having a front cover and an interconnected pump casing having a pump impeller connected thereto and a turbine runner with an outer casing drivingly connected to an output hub and a clutch actuating piston rotatably mounted on said hub, the improvement comprising: a continuously operative slip clutch assembly for coupling said front cover to said output hub for reducing the slip therebetween; said slip clutch assembly including a splined ring on an inside diameter of the front cover and a first friction plate connected to said splined ring against rotation relative thereto; and a second friction plate and an inner plate radially aligned with said second friction plate for connecting said second friction plate to said hub for rotation therewith; said piston operatively connected to said inner plate and responsive to operation of said torque converter to apply a pressure on said first and second friction plates whereby said front cover is connected to said hub through said second friction plate through a continuous slipping connection for increasing the efficiency of said torque converter and for partially damping engine disturbances inputed to said front cover; said first friction plate having a friction liner on only one side thereof wherein this liner is adapted to be engaged with said second friction plate; said second friction plate having a friction liner on only one side thereof wherein this liner is adapted to be engaged with said front cover; said piston having a friction liner thereon adapted to be engaged with said first friction plate.

Description:
BACKGROUND OF THE INVENTION 1.
Field of the Invention This invention relates to torque converters and more particularly to torque converters with an associated clutch to control slip between the input and output components of a torque converter.
2.
Description of the Related Art Torque converters used in association with automatic transmissions for vehicles, under certain operating conditions, are subject to a substantial degree of slip resulting in reduced powertrain fuel efficiency

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