Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Control of differential planetary gearing
Reexamination Certificate
2006-05-16
2006-05-16
Estremsky, Sherry (Department: 3681)
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Control of differential planetary gearing
Reexamination Certificate
active
07044878
ABSTRACT:
A differential rotation control apparatus for a vehicle having a differential, left and right output shafts of the differential, and left and right axle shafts, comprises variable displacement type left and right hydraulic pumps driveably provided between the left and right output shafts and the left and right axle shafts, a first hydraulic passage interposed between a discharge port of the left hydraulic pump and a suction port of the right hydraulic pump, a second hydraulic passage interposed between a discharge port of the right hydraulic pump and a suction port of the left hydraulic pump, and a controller for calculating a displacement ratio between the left and right hydraulic pumps based on a target turning radius and for controlling a rotation speed ratio between the left and right axle shafts so as to coincide with the calculated displacement ratio.
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Estremsky Sherry
Fuji Jukogyo Kabushiki Kaisha
McGinn IP Law Group PLLC
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