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:
Feb. 17, 2015
Filed:
Sep. 23, 2011
Hiroaki Kawasaki, Ashiya, JP;
Hiroaki Kawasaki, Ashiya, JP;
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Abstract
A vehicle mass estimation apparatus includes a wheel rotation speed information detection device configured to detect rotation speed information regarding the respective wheels of the vehicle; a frequency characteristic estimation device configured to calculate wheel acceleration information based on the rotation speed information of the wheels to estimate a frequency characteristic of the wheel acceleration information; and a vehicle mass estimation device configured to estimate a vehicle mass based on the estimated frequency characteristic. The frequency characteristic estimation device calculates an integrated value of frequency gain magnitudes of the respective frequency domains of front wheels and rear wheels of the vehicle, and the vehicle mass estimation device estimates the vehicle mass based on the ratio among the respective integrated values of the front wheels and rear wheels and a relation calculated in advance between the ratio and the vehicle mass.