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.:

US 8326489 B1

PDF
Full Text
Expired
Date of Patent:
Dec. 04, 2012

Filed:

Nov. 12, 2009
Applicants:

Yoshihiro Oniwa, Saitama, JP;

Yasuo Shimizu, Saitama, JP;

Shigeru Yamawaki, Saitama, JP;

Kazushige Sugamata, Saitama, JP;

Inventors:

Yoshihiro Oniwa, Saitama, JP;

Yasuo Shimizu, Saitama, JP;

Shigeru Yamawaki, Saitama, JP;

Kazushige Sugamata, Saitama, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D 5/04 (2006.01); B62D 6/10 (2006.01);
U.S. Cl.
CPC ...
Abstract

The present invention discloses a controller of an electric power-assist steering system including a torque detector for detecting a torque applied with a steering wheel that steers a steering system; a steering status determining section for determining a steering status of either 'turn' or 'return' of a steering wheel; and a motor controlling unit for driving a motor in accordance with a target current value calculated based on at least a torque value from the torque detector and the steering status of either “turn” or “return” of the steering wheel from the steering status determining section, wherein the motor controlling unit sets a target current value right after a time when the steering status is switched between “turn” and “return” to be substantially equal to an actual current value right before a time when the steering status is switched between “turn” and “return”.


Find Patent Forward Citations

Oniwa, Yoshihiro. (2012). Controller of electric power-assist steering system (U.S. Patent No. 8326489). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8326489

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