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.
Patent No.:
Date of Patent:
Dec. 14, 2010
Filed:
Nov. 15, 2006
Yoshinari Kawahara, Fukuoka, JP;
Atsushi Yokoyama, Yamato, JP;
Satoru Kuragaki, Isehara, JP;
Hirotaka Oikawa, Yokohama, JP;
Kenji Hiraku, Kasumigaura, JP;
Yoshinari Kawahara, Fukuoka, JP;
Atsushi Yokoyama, Yamato, JP;
Satoru Kuragaki, Isehara, JP;
Hirotaka Oikawa, Yokohama, JP;
Kenji Hiraku, Kasumigaura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention provides an electro-mechanical brake system which can keep a stop state even if a malfunction is generated in a parking brake, and an electro-mechanical brake apparatus used for the electro-mechanical brake system. An electro-mechanical brake actuator presses a brake pad to a disc rotor so as to independently brake a braking force of each of wheels. A parking brake is constituted by a pawl portion attached to a motor of a motor driving the electro-mechanical actuator and a latch. A main controller detects a failure of the parking brake on the basis of a motor displacement at a time of reducing a motor current, and increases the pressing force in the remaining normal parking brake in the case that the parking brake failure in one wheel or more is detected.