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. 02, 2001
Filed:
Mar. 31, 2000
Satoru Ohsaku, Toyota, JP;
Toyoto Jidosha Kabushiki Kaisha, Tokyo, JP;
Abstract
A speed (Zw′−Zb′) and an amount (Zw−Zb) of displacement of a wheel relative to a vehicle body are estimated with the aid of an observer, based on a vertical acceleration Zb″ of the vehicle body detected by a sensor. In this observer, a non-linear component fnl(Zw′−Zb′, P) of a damping force of a damper is derived from an estimated relative speed y1ob and an opening position P of the damper, and the component fnl(Zw′−Zb′, P) is used as a control input. The non-linear component fnl(Zw′−Zb′, P) is compensated for by means of a spring force fs of a stabilizer which is generated by roll movements of the vehicle body resulting from a convex-concave road surface, a change &Dgr;Mr in road holding load which is calculated based on a lateral acceleration Gy and generated by roll movements of the vehicle body when the vehicle turns, and a change &Dgr;Mp in road holding load which is calculated based on a longitudinal acceleration Gx and generated by pitch movements of the vehicle body when the vehicle is accelerated or decelerated.