Clutch ball ramp actuator to maintain state upon loss of power

Details Clutch ball ramp actuator to maintain state upon loss of power Clutch ball ramp actuator to maintain state upon loss of power

1996-04-17

1997-07-29

Pitts, Andrea L.

192 clutches and power-stop control

Clutches

Automatic

192 40, 192 5452, 192 847, 192 93A, F16D 1304, F16D 4320

Patent

active

056514379

ABSTRACT:
A ball ramp actuator having a control ring axially separated from a pressure plate by rolling members engaging matching opposed grooves having a variable depth acting to supply an axial clamping force against a clutch disc in a clutch assembly and a releasable one-way clutch having a first race attached to the control ring and a second race attached to the pressure plate acting to only allow relative rotation between the control ring and the pressure plate in a direction to increase the clamping force on the clutch disc until a release coil is energized to release the one-way clutch thereby allowing the control ring to rotate relative to the pressure plate in a direction to decrease the clamping force on the clutch disc. A control coil is used to apply an electromagnetic force on the control ring to activate the ball ramp actuator.

REFERENCES:
patent: 2937729 (1960-05-01), Sperr et al.
patent: 4805486 (1989-02-01), Hagiwara et al.
patent: 5078249 (1992-01-01), Botterill
patent: 5092825 (1992-03-01), Goscenski, Jr. et al.
patent: 5469948 (1995-11-01), Organek et al.
patent: 5485904 (1996-01-01), Organek et al.
patent: 5505285 (1996-04-01), Organek

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