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:
Apr. 25, 2006
Filed:
Jun. 03, 2004
Toshihiro Takahashi, Nishio, JP;
Shoji Ogawa, Chiryu, JP;
Hiroshi Kuroyanagi, Nagoya, JP;
Shoji Asai, Nagoya, JP;
Toshihiro Takahashi, Nishio, JP;
Shoji Ogawa, Chiryu, JP;
Hiroshi Kuroyanagi, Nagoya, JP;
Shoji Asai, Nagoya, JP;
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Abstract
A controller of a steer-by-wire steering apparatus determines whether voltage applied to a steering motor in accordance with a current command value has reached a predetermined voltage. Based on the result, the controller selects one of the value of an actual current through the steering motor and a current command value. Based on the selected current value, an axial force applied to a steering rod is estimated. Based on the estimated axial force, a counter torque motor is controlled. Therefore, An error or oscillation occurring in the estimated steering axial force is prevented, and the driver is suppressed from further turning the steering wheel when the voltage applied to the steering motor is saturated.