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:
Dec. 25, 2012
Filed:
Jan. 21, 2010
Yoshinobu Ito, Anjo, JP;
Tomohiro Aritake, Anjo, JP;
Yoshinobu Ito, Anjo, JP;
Tomohiro Aritake, Anjo, JP;
Aisin AW Co., Ltd., Anjo-shi, Aichi-ken, JP;
Abstract
A shift-by-wire system, connected to a manual shaft in a vehicle, includes: an electric motor having a rotary shaft which rotates the manual shaft; an angle-of-rotation sensor that detects angle position of the rotary shaft for control of the electric motor; a shaft position sensor that detects angular position of the manual shaft; and a control unit that, when the angle-of-rotation sensor functions normally, controls the electric motor according to the sensed angular position of the rotary shaft, so that the sensed angular position of the shaft comes within a predetermined range, and when the angle-of-rotation sensor does not function normally, initiates sensor-less control of the electric motor while estimating the direction of rotation of the rotation shaft, based on the sensed angular position of the shaft, and ceases sensor-less control when the sensed angular position is within the predetermined range.