Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Control of differential planetary gearing
Patent
1998-02-25
1999-09-14
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Control of differential planetary gearing
475230, 475236, 475231, F16H 4806
Patent
active
059514264
ABSTRACT:
A hydraulically actuated limited slip differential which transfers a predetermined amount of clutch torque each time the clutch mechanism is triggered. 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 the clutch mechanism. 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 trigger the frictional clutch mechanism with the differential casing to provide braking action between the side gears and the differential casing. The clutch mechanism includes a cone clutch element having a frusto-conical engagement surface which frictionally engages an insert having a complementary frusto-conical engagement surface. The hydraulic trigger and cam separation produce a predetermined amount of axial movement by the cone clutch element and the insert to provide a predetermined amount of clutch torque.
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Auburn Gear, Inc.
Kwon Peter T.
Wright Dirk
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