Bi-directional multi-mode clutch for change-speed transmission u

Details Bi-directional multi-mode clutch for change-speed transmission u Bi-directional multi-mode clutch for change-speed transmission u

1991-05-08

1992-04-21

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

475146, 192 54, 192 85AA, F16H 344

Patent

active

051063484

ABSTRACT:
This bi-directional clutch combines the functions of two separate opposite acting clutching systems, each consisting of a one-way roller or sprag clutch and an in-series coupled multi-plate friction unit. The clutch is operative regardless of direction of torque to provide fully synchronized upshifts and downshifts of gear ratios in automatic transmissions. This clutch incorporates a torque responsive reaction plate which regulates the apply pressure in accordance to the torque carried by the clutch. Consequently, when the torque acting in selected direction descends to zero at the start of torque reversal, the clutch is automatically released. Direction of one-way action is selected by switching clutch feed and exhaust oils by controls.

REFERENCES:
patent: 3057225 (1962-10-01), Snyder
patent: 4261213 (1981-04-01), Rattunde
patent: 4817772 (1989-04-01), Sacher
patent: 5031746 (1991-07-01), Koivunen

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