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. 10, 2015
Filed:
Jul. 13, 2011
Masaya Endo, Tokyo, JP;
Takashi Iwasaki, Tokyo, JP;
Masahiko Kurishige, Tokyo, JP;
Takayuki Kifuku, Tokyo, JP;
Yoshihiko Kinpara, Tokyo, JP;
Masaya Endo, Tokyo, JP;
Takashi Iwasaki, Tokyo, JP;
Masahiko Kurishige, Tokyo, JP;
Takayuki Kifuku, Tokyo, JP;
Yoshihiko Kinpara, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An electric power steering system includes steering a torque detector that detects steering torque, and a motor that provides assist torque based on the detected steering torque, wherein for the purpose of estimating, without detecting motor rotation angular information and rotation angular velocity information, the road reaction torque in which the influence of the motor inertia torque is eliminated, a value corresponding to rotation velocity of a steering shaft is calculated based on the steering torque and the assist torque, to calculate road reaction torque based on the value corresponding to the rotation velocity of the steering shaft.