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:
Sep. 16, 2014
Filed:
Jan. 30, 2012
Applicants:
Daisuke Goto, Yokohama, JP;
Hirotaka Oikawa, Yokohama, JP;
Takuya Usui, Yokohama, JP;
Inventors:
Assignee:
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 66/02 (2006.01); F16D 65/18 (2006.01); F16D 65/56 (2006.01); B60T 13/74 (2006.01); B60T 17/22 (2006.01); F16D 66/00 (2006.01); F16D 125/36 (2012.01); F16D 121/24 (2012.01); F16D 125/50 (2012.01);
U.S. Cl.
CPC ...
B60T 13/741 (2013.01); F16D 65/18 (2013.01); F16D 65/567 (2013.01); F16D 2066/005 (2013.01); F16D 2066/003 (2013.01); F16D 2125/36 (2013.01); F16D 2066/006 (2013.01); F16D 2121/24 (2013.01); F16D 2125/50 (2013.01); B60T 17/221 (2013.01);
Abstract
An electric brake apparatus compares an estimated thrust force corresponding to a predetermined rotational position of an electric motor, which is calculated from an electric current/thrust force conversion function, with a reference thrust force based on a rotational position/thrust force table indicating a relationship between the rotational position of the electric motor and a thrust force of a piston to correct and update the electric current/thrust force conversion function, thereby maintaining a predetermined control accuracy despite wear of a brake pad and other changes over time.