Vehicle brake apparatus
US8985283B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 24, 2011 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Dec 6, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2121/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.