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:
Aug. 05, 2014
Filed:
Oct. 02, 2009
Takashi Mitsuhara, Uda, JP;
Takashi Mitsuhara, Uda, JP;
JTEKT Corporation, Osaka, JP;
Abstract
An electric power steering system includes: a shaft angle sensor that outputs a signal indicating a rotation angle of a shaft through which a turning operation force is transmitted to a steering mechanism; a motor angle sensor that outputs a signal indicating a rotation angle of a motor; and a control section that determines the number of turns of the steering wheel based on both outputs of the shaft angle sensor and the motor angle sensor, wherein when it is required to determine the number of turns, the control section detects an angle error between the outputs of the shaft angle sensor and the motor angle sensor based on the outputs thereof and when the angle error falls within a predetermined allowable range, the control section determines the number of turns, and when the angle error is out of this range, the control section avoids determining the number of turns.