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:
Nov. 29, 2011
Filed:
Apr. 30, 2008
Kazuya Yoshioka, Kashiwara, JP;
Yasuyuki Yoshii, Souraku-gun, JP;
Kenji Higashi, Tenri, JP;
Shimon Jimbo, Kashiwara, JP;
Masami Naka, Yamatokoriyama, JP;
Shiro Nakano, Minamikawachi-gun, JP;
Kazuya Yoshioka, Kashiwara, JP;
Yasuyuki Yoshii, Souraku-gun, JP;
Kenji Higashi, Tenri, JP;
Shimon Jimbo, Kashiwara, JP;
Masami Naka, Yamatokoriyama, JP;
Shiro Nakano, Minamikawachi-gun, JP;
JTEKT Corporation, Osaka-shi, JP;
Abstract
A steering shaft is composed of an upper shaft, a lower shaft, an input shaft, and an output shaft. The upper shaft, the lower shaft, and the input shaft can rotate together, and the input shaft and the output shaft are relatively rotatably coupled to each other via a torsion bar. The rotational position of a rotor coupled to the output shaft is calculated based on the detected rotational position of the lower shaft and a steering torque detected based on the amount of relative rotational displacement of the input shaft and the output shaft. Thus, it is not necessary to include a rotor rotational position detecting unit for detecting the rotational position of the rotor within the electric motor, which reduces the size of the electric motor.