All-wheel drive automotive vehicle traction control system

Details All-wheel drive automotive vehicle traction control system All-wheel drive automotive vehicle traction control system

1984-06-14

1986-05-20

Weakley, Harold W.

Motor vehicles

With means for detecting wheel slip during vehicle...

180244, B60K 17356

Patent

active

045895112

ABSTRACT:
To prevent spinning of wheels in all-wheel vehicles, a traction control system is used which, in its simplest form, may use existing wheel speed sensors. If any one, or more, or all of the wheel speed sensors provide output signals representative of spinning of a wheel, for example by providing output signals representative of a substantially higher speed than other wheels, or higher than a reference--indicating that all wheels are spinning--an output signal is generated by the electronic control unit (6) which, in turn, controls application of the wheel brake to the respective wheel, thus preventing its spinning. Spinning of any one wheel, of course, causes loss of traction at another one due to the effect of the normally interposed differentials (4, 5, 3a). Thus, the system provides a simple, electronically controlled "differential lock-up", responsive only to speed of spinning wheels, without modification of the differentials as such, by applying the external wheel brakes, selectively, to those wheel or wheels which are spinning.

REFERENCES:
patent: 3819004 (1974-06-01), Adde
patent: 3893535 (1975-07-01), Borckhardt
patent: 3967862 (1976-07-01), Hunter
patent: 4164872 (1979-08-01), Weigl
patent: 4344139 (1982-08-01), Miller
patent: 4410947 (1983-10-01), Strong
patent: 4416347 (1983-11-01), Bertling
patent: 4432430 (1984-02-01), Lind

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