The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jun. 30, 1992

Filed:

Nov. 12, 1991
Applicant:
Inventors:

Masashi Kitagawa, Tochigi, JP;

Yasuhiko Fujita, Tochigi, JP;

Toshiaki Arai, Tochigi, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T / ; B60L / ;
U.S. Cl.
CPC ...
188158 ; 188-111 ; 188 721 ; 1881 / ; 303 20 ; 303 93 ;
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.


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