Patent ID: 6991079
Filing Date: 2006-01-31
Classification: B60K,F16D

Abstract:
1. A power transmission device comprising: a first rotary member; a second rotary member; a torque transfer mechanism operable for transferring drive torque between said first and second members, said torque transfer mechanism having a transfer clutch disposed between said first and second rotary members and a rotary operator for applying a clutch engagement force to said transfer clutch, said rotary operator including a first component rotatably driven by one of said first and second rotary members and a second component coaxially aligned with said first component so as to define a plurality of actuation chambers therebetween, said second component is adapted to rotate relative to said first component in response to fluid pressure in said actuation chambers for generating said clutch engagement force; and a hydraulic control system for regulating the fluid pressure supplied to said actuation chambers.