Motor vehicle brake system with fail-safe mechanism

Details Motor vehicle brake system with fail-safe mechanism Motor vehicle brake system with fail-safe mechanism

1991-11-12

1992-06-30

Butler, Douglas C.

Brakes

Operators

Electric

188 111, 188 721, 188106P, 303 20, 303 93, B60T 1366, B60L 700

Patent

active

051254832

ABSTRACT:
An electric brake system for a motor vehicle has a plurality of braking force generating mechanisms associated with respective road wheels and including electronic actuators mechanically separate from a brake pedal. In the event of a failure of at least one of the braking force generating mechanisms, the electric brake system selects and operates normal braking force generating mechanism or mechanisms for braking the motor vehicle stably with boosted braking forces. The braking force generating mechanisms are mechanically separate from the brake pedal and operable independently of each other. Failure detecting circuits are associated respectively with the braking force generating mechanisms, for detecting a failure of the braking force generating mechanisms and producing a failure signal representing the failure. The electric brake system includes a controller for controlling the braking force generating mechanisms in response to the signal from the brake pedal. The controller selects at least one of the braking force generating mechanisms to be operated based on the failure signal from the failure detecting circuit according to a predetermined rule.

REFERENCES:
patent: 4327414 (1982-04-01), Kleih
patent: 4658939 (1987-04-01), Kircher et al.
patent: 4854424 (1989-08-01), Yamatoh et al.
patent: 4995483 (1991-02-01), Moseley et al.

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