Measuring and testing – Tire – tread or roadway
Reexamination Certificate
2011-06-21
2011-06-21
Caputo, Lisa M (Department: 2855)
Measuring and testing
Tire, tread or roadway
C340S442000, C702S138000
Reexamination Certificate
active
07963157
ABSTRACT:
An apparatus for detecting a decrease in a tire air pressure includes: a rotation velocity information detection means for periodically detecting tire rotation velocity information for the respective wheels of a vehicle; a frequency characteristic estimate means for estimating, based on this rotation velocity information, a frequency characteristic of the rotation velocity information; and a judgment means for judging, based on the estimated frequency characteristic, a decrease in the air pressure of the tire. The frequency characteristic estimate means includes, with regard to a time-series signal including the rotation velocity information, a parameter estimate means for subjecting parameters of a three-order or more linear model to a time-series estimate; an input signal estimate means for estimating, based on the estimated linear model and the rotation velocity information that is an output signal of the linear model, an input signal to the linear model; a parameter identification means for identifying, based on the estimated input signal and the rotation velocity information, parameters of a linear model caused to have a lower order of a second order; and a resonant frequency estimate means for estimating, based on the parameters identified based on the model caused to have a lower order of the second order, a resonant frequency of the tire in a torsional direction.
REFERENCES:
patent: 5301130 (1994-04-01), Alcone et al.
patent: 5557552 (1996-09-01), Naito et al.
patent: 6264292 (2001-07-01), Umeno et al.
patent: 6584427 (2003-06-01), Kamiya et al.
patent: 6789038 (2004-09-01), Nakashima et al.
patent: 7676345 (2010-03-01), Gustavsson et al.
patent: 2002/0095264 (2002-07-01), Kamiya et al.
patent: 2003/0200051 (2003-10-01), Nakashima et al.
patent: 2006/0015288 (2006-01-01), Ai et al.
patent: 10349625 (2004-07-01), None
patent: 578826 (1994-01-01), None
patent: 1350642 (2003-10-01), None
patent: 1674303 (2006-06-01), None
patent: 3152151 (2001-01-01), None
patent: 2005-14664 (2005-01-01), None
Adachi Shuichi
Kawasaki Hiroaki
Birch & Stewart Kolasch & Birch, LLP
Caputo Lisa M
Jenkins Jermaine
Sumitomo Rubber Industries Ltd.
LandOfFree
Apparatus and method for detecting decrease in tire air... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for detecting decrease in tire air..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for detecting decrease in tire air... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2650387