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:
Mar. 03, 2009
Filed:
May. 22, 2007
Akira Kobayakawa, Tokyo, JP;
Akira Kobayakawa, Tokyo, JP;
Kabushiki Kaisha Bridgestone, Tokyo, JP;
Abstract
A method for estimating accurately and stably the change of forces exerted on the tire or change of contact condition with the ground of the tire and an apparatus for putting it in operation. Prepare a tire with sensors disposed therein such that the first and the second deformation amount measurement meansA andB positioned on the vehicle body side and on outside, respectively, each of which comprises a lengthy detection portionmade of a conductive rubber member buried in the tire treadand placed in a circumferential direction of the tire and comprises of detection electrodesat both ends of the detection portion; and upon computing contact length with the ground of the tire vehicle body side and on the outside, from detected resistance value of the detection portionincluded in the means ofA and the wheel speed and from the resistance value ofincluded in the means ofA and the wheel speed and from the resistance value ofincluded in the meansB and the wheel speed, respectively, the load exerted on the tire and the lateral force exerted on the tire can be estimated form the average value and the difference value, respectively of the contact length on the vehicle body side and on the outside, respectively.