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. 18, 2014
Filed:
Mar. 23, 2011
Hiroki Takeda, Yokohama, JP;
Hirotaka Oikawa, Yokohama, JP;
Junichi Ikeda, Tokyo, JP;
Daisuke Goto, Yokohama, JP;
Hiroki Takeda, Yokohama, JP;
Hirotaka Oikawa, Yokohama, JP;
Junichi Ikeda, Tokyo, JP;
Daisuke Goto, Yokohama, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Abstract
Even when a rigidity table stored in a RAM at the time of a start of a brake operation does not coincide with an actual rigidity characteristic of an electric caliper which changes according to brake conditions including how often and how long a brake operation is applied, it is possible to reduce a deviation between a pressing force instruction value and a generated pressing force by updating the characteristic of the relation between a pressing force instruction value and rotational position each time an estimated thrust force value is calculated during one brake operation. It is possible to steadily keep followability to a pressing force instruction according to an actual state of the rigidity characteristic of the electric caliper, thereby ensuring generation of an appropriate brake force.