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. 08, 2013
Filed:
Oct. 26, 2010
Hajime Fujita, Nishinomiya, JP;
Mitsuhiro Wada, Kobe, JP;
Hajime Fujita, Nishinomiya, JP;
Mitsuhiro Wada, Kobe, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
An apparatus, method and program for estimating the mass of a vehicle uses periodically detected tire rotation speed information of the vehicle wheels, calculated tire rotation acceleration information, calculated driving force of the vehicle, and estimated mass of the vehicle as a regression coefficient when the rotation acceleration information and the driving force information are subjected to linear regression. With regard to an error in calculated driving force information, a ratio is calculated between the dispersion of the error obtained one time before and an error at the current moment, and an update adjustment parameter is calculated by adding a stabilization parameter to thus obtained ratio. The calculated update adjustment parameter is used to calculate a Kalman gain so that the mass is sequentially estimated so as to reduce an update width of the regression coefficient when the error ratio is higher.
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