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:
Apr. 19, 2011
Filed:
Aug. 12, 2009
Kenneth L. Oblizajek, Troy, MI (US);
John D. Sopoci, Commerce Township, MI (US);
Carl T. Wright, Highland, MI (US);
Kenneth L. Oblizajek, Troy, MI (US);
John D. Sopoci, Commerce Township, MI (US);
Carl T. Wright, Highland, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A raw runout signal of a tire is bandpass filtered utilizing appropriate, empirically determined, low and high tire order corners to determine the bandpass of the bandpass filter. A band-limited runout signal is then obtained and is examined for characteristic signal patterns of local runout which are known to exhibit periodically modulated cabin interior sound during vehicle movement, usually driving conditions involving highway speeds and smooth roads, which is audibly detectable by passengers based upon, for example, empirical analysis wherein the maximum gain of the bandpass filter is, preferably, unity.