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:
Mar. 24, 2015
Filed:
Feb. 24, 2011
Yusuke Oshio, Kariya, JP;
Takahisa Yokoyama, Anjo, JP;
Akira Sakai, Toyota, JP;
Naoki Yabusaki, Toyota, JP;
Shinsuke Yamamoto, Anjo, JP;
Yusuke Oshio, Kariya, JP;
Takahisa Yokoyama, Anjo, JP;
Akira Sakai, Toyota, JP;
Naoki Yabusaki, Toyota, JP;
Shinsuke Yamamoto, Anjo, JP;
Advics Co., Ltd., Kariya-Shi, Aichi, JP;
Toyoto Jidosha Kabushiki Kaisha, Toyota-Shi, Aichi, JP;
Abstract
A vehicle brake apparatus capable of preventing abnormal vibration due to thickness variations in a disc rotor includes a motor drive unit configured to control the motor which presses the brake pad against the disc rotor, a brake pressure detection unit for detecting a braking pressure for pressing the brake pad, and a wheel speed sensor for detecting a rotation speed of the disc rotor. If an amount of variation in the detection values detected by the brake pressure detection unit during one rotation of the disc rotor exceeds a variation amount determination threshold value and a detection value variation frequency has a correlation with the rotation speed of the disc rotor and the detection value variation frequency exceeds a variation frequency determination threshold value, the motor drive unit controls the motor in inverted phase to the variation in the detection values.