Anti-skid brake control system for four-wheel drive vehicles

Details Anti-skid brake control system for four-wheel drive vehicles Anti-skid brake control system for four-wheel drive vehicles

1995-08-23

1997-02-04

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

And traction control

303190, 303169, B60K 17348

Patent

active

055990754

ABSTRACT:
An anti-skid brake control system for a four-wheel drive vehicle employs a transfer which distributes a driving torque to front and rear differentials, a front-wheel mean revolution-speed sensor, a rear-wheel mean revolution-speed sensor, and a four-wheel-drive control section. The four-wheel-drive control section controls a driving-torque distribution ratio of the transfer based on the two mean revolution-speeds detected by the sensors. The system comprises an anti-skid brake control section intercommunicated with the four-wheel-drive control section. The anti-skid brake control section controls a wheel-brake cylinder pressure of each road wheel based on at least a revolution-speed of one of the front road wheels, a revolution-speed of the other wheel of the front road wheels, and the mean revolution-speed detected by the rear-wheel mean revolution-speed sensor. An additional sensor is provided at the one front wheel. An arithmetic processor is provided for calculating the revolution-speed of the other front wheel, based on the revolution-speed detected by the additional sensor, the mean revolution-speed detected by the front-wheel mean revolution-speed sensor, and a final drive ratio in the front differential.

REFERENCES:
patent: 4832145 (1989-05-01), Fujii et al.
patent: 4866625 (1989-09-01), Kawamoto et al.

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