Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Control of differential planetary gearing
Patent
1998-02-25
1999-12-14
Estremsky, Sherry L.
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Control of differential planetary gearing
475 86, 475231, 475240, F16H 4822
Patent
active
060010401
ABSTRACT:
A hydraulically actuated limited slip differential which can be configured to be either speed and torque sensitive or speed sensitive. The differential includes a hydraulic pump mechanism comprising a plurality of fluid supply passages disposed in a side gear and in fluid communication with a cavity defined by the side gear and a piston. The hydraulic pump mechanism transfers fluid into the cavity in response to meshing rotation between the pinion gears and the side gears. Sufficiently high differentiation between the output shafts increases the pressure in the cavity to increase frictional pressure between a frictional clutch mechanism and the differential casing to provide braking action between the side gears and the differential casing. The angular relationship between the clutch surfaces of the clutch mechanism and the differential casing may be configured such that the side gear separating forces and hydraulic pressure act in either a reinforcing or opposing manner. The side gear may be indirectly engaged with the differential casing to provide a speed and torque sensitive differential or directly contact the differential casing to provide a speed sensitive differential.
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Auburn Gear, Inc.
Estremsky Sherry L.
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