Fluid-pressure and analogous brake systems – Speed-controlled – With failure responsive means
Reexamination Certificate
2006-11-15
2010-12-14
Nguyen, Xuan Lan (Department: 3657)
Fluid-pressure and analogous brake systems
Speed-controlled
With failure responsive means
C303S124000, C303S162000
Reexamination Certificate
active
07850255
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.
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patent: 2003/0066719 (2003-04-01), Watanabe et al.
patent: 2005/0258683 (2005-11-01), Yamaguchi
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European Search Report dated Mar. 20, 2007 (Six (6) pages).
Hiraku Kenji
Kawahara Yoshinari
Kuragaki Satoru
Oikawa Hirotaka
Yokoyama Atsushi
Crowell & Moring LLP
Hitachi , Ltd.
Nguyen Xuan Lan
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