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:
Aug. 21, 2007
Filed:
Mar. 30, 2006
Akihiro Miyoshi, Kobe, JP;
Keita Nakano, Kariya, JP;
Akihiro Miyoshi, Kobe, JP;
Keita Nakano, Kariya, JP;
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo-ken, JP;
Advics Co., Ltd., Kariya-shi, Aichi-ken, JP;
Abstract
An apparatus for detecting a longitudinal force of a tire is provided with at least one mark () provided in on one circumferential line (j) in a tire (), a first sensor () disposed in a vehicle body side () and capable of detecting a passage of the mark (), a second sensor () capable of detecting a rotation angle (θ) of an axle (), and a computing device () for computing a longitudinal force (Fr) of the tire () on the basis of an information of the first and second sensors (). The computing device () sequentially stores a rotation angle (θr) of the axle () when the mark () passes through the first sensor (). Further, the computing device () computes a tire warp angle (αr) corresponding to a difference (θo−θr) between a no-load rotation angle θo (a rotation angle of the axle () in a no-load state) stored in advance and the rotation angle θr, and sequentially computes a tire longitudinal force (Fr) of a tire applied during the running from the warp angle (αr), using a previously determined relational equation F=f(α) between the warp angle (α) and the tire longitudinal force (F).