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:
May. 01, 2012
Filed:
Mar. 05, 2007
Hiroshi Fujimoto, Yokohama, JP;
Kiyoshi Fujii, Yokohama, JP;
Hiroshi Fujimoto, Yokohama, JP;
Kiyoshi Fujii, Yokohama, JP;
Yokohama National University, Yokohama-shi, JP;
Abstract
The present invention provides a slip rate estimating device measuring a slip ratio without the need for a body speed and a slip ratio control device using the slip ratio estimating device. A motor torque measured by a torque measuring instrument is input to each of a vehicle model () and an SRE () that performs calculations including time differentiation of the slip ratio. The vehicle model () derives a wheel rotation speed, a wheel rotation acceleration, and a body speed. The vehicle model () outputs the wheel rotation speed and the wheel rotation acceleration to the SRE (). The SRE () outputs the slip ratio based on the motor torque, the wheel rotation speed, and the wheel rotation acceleration.