Differential device

Details Differential device Differential device

2001-07-18

2003-04-08

Wright, Dirk (Department: 3681)

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Control of differential planetary gearing

Reexamination Certificate

active

06544137

ABSTRACT:

TECHNICAL FIELD OF THE INVENTION
This invention relates generally to differential devices in the automotive industry and, more specifically, to limited slip differential devices for coupling an input shaft, a first output shaft, and a second output shaft.
BACKGROUND OF THE INVENTION
In front or rear wheel drive vehicles, a front or rear differential is typically used to transfer the torque and motion from the engine and transmission to the left and right half shafts, and to allow the two half shafts to rotate at different speeds, which is fundamental to the vehicle for efficient turns. For all-wheel-drive vehicles, a central differential is typically installed to allow the front and rear shafts to rotate at different speeds, which, again, is fundamental to the vehicle for efficient turns and for stress avoidance. In a vehicle using a conventional differential, however, if one wheel loses traction, the other wheel loses traction also. The limited slip differential was created to overcome this problem. In a vehicle using a conventional limited slip differential, if one wheel lost traction and begun to rotate much faster than the other wheel, the conventional limited slip differential sensed the situation and restricted the rotation of the wheel. Because increased traction is very important in a vehicle, especially in off-road conditions, there is a need in the automotive industry for continuous improvement of the limited slip differential.


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M. Okcuoglu, “A Descriptive Analysis of Gerodisc Type Limited Slip Differentials and All Wheel Drive Couplings”, Society of Automotive Engineers, Inc., Copyright 1995, pp. 15-20.

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