Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Control of differential planetary gearing
Patent
1998-02-25
1999-08-17
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Control of differential planetary gearing
F16H 4822
Patent
active
059385553
ABSTRACT:
A speed sensitive limited slip differential having a sealed, self contained clutch actuator which expands and retracts as required to frictionally seat a clutch element against a surface of the differential casing. The clutch actuator comprises a housing portion and a piston portion which define two fluid chambers and a gerotor pump assembly contained therein for transferring fluid between the two fluid chambers. The gerotor pump assembly is splined to an output element to transfer fluid between the two chambers when sufficient differential rotation between the output element and the casing exists. The transfer of fluid between the two chambers results in the axial expansion of the actuator housing and the actuator piston to provide an axial force on a side gear to thereby frictionally seat the clutch element against a surface of the differential casing. The sealed, self contained feature allows the present limited slip differential to operate in a simple, reliable manner.
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Auburn Gear, Inc.
Wright Dirk
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