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. 12, 2005
Filed:
Oct. 12, 2001
Katsuhiro Asano, Aichi-gun, JP;
Eiichi Ono, Aichi-gun, JP;
Takaji Umeno, Aichi-gun, JP;
Hideki Ohashi, Toyota, JP;
{umlaut Over (K)}azuhiro Kamiya, Anjo, JP;
Yukio Mori, Nagoya, JP;
Toshiharu Naito, Kariya, JP;
Katsuhiro Asano, Aichi-gun, JP;
Eiichi Ono, Aichi-gun, JP;
Takaji Umeno, Aichi-gun, JP;
Hideki Ohashi, Toyota, JP;
{umlaut over (K)}azuhiro Kamiya, Anjo, JP;
Yukio Mori, Nagoya, JP;
Toshiharu Naito, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A tire burst predicting device which can predict occurrence of bursting of a tire and gives an alarm properly is provided. A break point frequency is estimated on the basis of time series data of wheel speed detected at a wheel speed sensor from frequency response of a first order model to which a transmission characteristic from a road surface disturbance to a wheel speed is approximated. A braking force gradient corresponding to the estimated break point frequency is estimated, on the basis of a map, which is prestored, representing a relationship between break point frequencies and braking force gradients. Extra high frequency components are eliminated from the estimated braking force gradient by a low pass filter to reduce estimation dispersion. Differentiators detect changing speed of the braking force gradient. An alarm is given when there is a possibility of bursting of tire when the detected changing speed reaches or exceeds a predetermined threshold value.