Differential unit with means for mixing air into the hydraulic a

Details Differential unit with means for mixing air into the hydraulic a Differential unit with means for mixing air into the hydraulic a

1996-03-27

1998-01-20

Ta, Khoi Q.

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Control of differential planetary gearing

475 88, 477 35, 184 623, F16H 4830, F01M 1118

Patent

active

057096279

ABSTRACT:
A differential unit having a speed-sensitive-type differential limiting function is capable of moderating the differential limiting force to maintain the controllability and stability of a vehicle. The differential unit according to the present invention includes a differential case to be rotated by drive force of an engine, a differential mechanism for distributing rotations of the differential case to a pair of output shafts, a frictional clutch for limiting the differential of the differential mechanism, a hydraulic actuator for clutching the frictional clutch, an oil pump which receives differential torque of the differential mechanism so as to be driven to operate the hydraulic actuator, control valves for introducing air to the oil suction portion of the oil pump, and a controller for opening or closing the control valve to correspond to a condition under which a vehicle is driven.

REFERENCES:
patent: 4715248 (1987-12-01), Gant
patent: 4727966 (1988-03-01), Hiramatsu et al.
patent: 5186278 (1993-02-01), Ives et al.
patent: 5301766 (1994-04-01), Momiyama et al.
patent: 5595214 (1997-01-01), Shaffer et al.

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