Control device for differential limiting mechanisms of four-whee

Details Control device for differential limiting mechanisms of four-whee Control device for differential limiting mechanisms of four-whee

1988-06-01

1989-10-17

Marmor, Charles A.

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

180197, 3644241, B60R 1734

Patent

active

048740594

ABSTRACT:
A control device for controlling differential limiting mechanisms of a four-wheel drive car provided with a central differential gear having a first differential limiting mechanism, a differential gear having a second differential limiting mechanism incorporated in a rear drive shaft and a differential gear incorporated in a front drive shaft includes sensors for detecting the rotational frequencies of the wheels, actuators for operating the respective differential limiting mechanisms and a controller. The controller controls the actuators such that the differential is greatly limited by the first differential limiting mechanism when a difference between the rotational frequencies of the front and rear wheels is larger than a predetermined value and the differential is greatly limited by the second differential limiting mechanism when a difference between the rotational frequencies of the left and right wheels is larger than a predetermined value.

REFERENCES:
patent: 4671373 (1987-06-01), Sigl
patent: 4771850 (1988-09-01), Matsuda
patent: 4776424 (1988-10-01), Naito
patent: 4790404 (1988-12-01), Naito
"Autocar", Feb. 26, 1986, pp. 22-23.

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