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:
Oct. 28, 2025
Filed:
Mar. 15, 2022
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Jtekt Corporation, Kariya, JP;
Amane Yajima, Kanagawa-ken, JP;
Yoshio Kudo, Machida, JP;
Koji Anraku, Okazaki, JP;
Isao Namikawa, Okazaki, JP;
Kenji Yoshida, Nagoya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
JTEKT CORPORATION, Kariya, JP;
Abstract
In a reaction torque calculation process, an electronic control unit included in a steer-by-wire steering device is configured to calculate a distributed axial force obtained by distributing an angle axial force and an electric current axial force based on a final distribution ratio. The reaction torque calculation process includes at least one of a first abnormal-time process and a second abnormal-time process. The first abnormal-time process is executed to hold, for calculation of the angle axial force, a vehicle speed signal value immediately before the vehicle speed signal becomes abnormal. The second abnormal-time process is executed to hold, for calculation of a normal-time distribution ratio, a vehicle speed signal value immediately before the vehicle speed signal becomes abnormal or hold a value of the normal-time distribution ratio immediately before the vehicle speed signal becomes abnormal, and then gradually change the final distribution ratio to an abnormal-time distribution ratio.