Anti-lock braking system for all-wheel drive vehicles

Details Anti-lock braking system for all-wheel drive vehicles Anti-lock braking system for all-wheel drive vehicles

1991-11-26

1992-12-22

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

180233, 180248, 180244, 303 92, 303111, B60T 832, B60T 860, B60T 892, B60T 888

Patent

active

051729598

ABSTRACT:
An anti-lock braking system for a two-axle all-wheel drive vehicle having two intra-axle differentials and an engageable central inter-axle differential comprises a wheel sensor associated with each of the wheels for determining the rotational behavior of each of the wheels, and a four-channel electronic control circuit for providing individual wheel regulation. The electronic control circuit also detects whether the central differential is engaged or not and whether a malfunction has occurred in one of the channels. If one of the regulating channels has a malfunction and the central differential is not engaged, the electronic control circuit switches off regulation only in the malfunctioning channel. If, however, the central differential is engaged when a malfunction in one of the regulating channels has occurred, then the electronic control circuit switches off both the malfunctioning channel as well as an intact channel associated with a diagonally opposite wheel.

REFERENCES:
patent: 4059312 (1977-11-01), Jonner
patent: 4345796 (1982-08-01), Reinecke
patent: 4648662 (1987-03-01), Fennel et al.
patent: 4895217 (1990-01-01), Hueckler et al.
patent: 4947325 (1990-08-01), Iwata et al.
patent: 4962970 (1990-10-01), Jonner et al.
patent: 4991679 (1991-02-01), Fujii et al.
patent: 5032995 (1991-07-01), Matsuda et al.

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