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:
Jun. 06, 2017
Filed:
Dec. 11, 2012
Fumito Kurata, Gotenba, JP;
Takashi Suzuki, Susono, JP;
Fumito Kurata, Gotenba, JP;
Takashi Suzuki, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi, JP;
Abstract
An unsprung state detection part () calculates a variation amount X (=|φ−φ'|), which is a magnitude of a difference between a detected angle φ output from a resolver rotational angle sensor () for detecting a rotational angle of an in-wheel motor () and an estimated angle φ′ of a motor rotational angle (Sto S). The estimated angle φ′ can be calculated by adding an estimated angle of the rotation of the motor () in one calculation cycle to a detected angle φn−1 of the previous calculation cycle. When the variation amount X is more than a road surface determination threshold Xref, the unsprung state detection part () determines that the travel road on which a vehicle () is traveling is a rough road (S, S). As a result, the road surface determination can be made by using the rotational angle sensor ().