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. 07, 2005
Filed:
Apr. 08, 2003
Atsushi Mori, Kanuma, JP;
Atsushi Mori, Kanuma, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method is provided capable of improving the accuracy of estimations of quantities that represent the state of a vehicle, such as vehicle speed, wheel slip ratio, wheel speed along the ground, longitudinal wheel force and the vehicle body sideslip angle, or values related to the quantities that represent the vehicle state, using a simple and inexpensive method. A tire longitudinal force computing unitcalculates longitudinal forces Fto Fof each of the wheels by substituting a coefficient of friction μ, which is adjusted such that a deviation between a detected value of a longitudinal acceleration Gand an estimated longitudinal acceleration Gis zero, an estimated vehicle speed V, slip ratios Sto Sof each of the wheels calculated based on detected values of sensorsand, loads Wto Wof each of the wheels, calculated based on detected values of sensorsand, and lateral forces Yto Y, into an equation related to a predetermined tire dynamics model. A longitudinal acceleration estimating unitcalculates an estimated longitudinal acceleration Gbased on the longitudinal forces Fto Fand a predetermined movement equation. An integratorintegrates with respect to time the estimated longitudinal acceleration G, and calculates an estimated vehicle speed V.