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:
Nov. 06, 2012
Filed:
Jul. 28, 2008
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Masatomo Yoshihara, Toyota, JP;
Kenji Senda, Okazaki, JP;
Norihito Hanai, Toyota, JP;
Yasuhiro Yamasako, Toyota, JP;
Yuichi Takemura, Anjo, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Masatomo Yoshihara, Toyota, JP;
Kenji Senda, Okazaki, JP;
Norihito Hanai, Toyota, JP;
Yasuhiro Yamasako, Toyota, JP;
Yuichi Takemura, Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
An engine ECU executes operations including: extracting vibration intensities of a plurality of frequency bands from vibration detected by a knock sensor, multiplying the extracted vibration intensity of each frequency band by a weight coefficient and adding the results in correspondence with crank angles to calculate integrated values of every five degrees; calculating a coefficient of correlation based on a result of comparison between a vibration waveform of a frequency band and a knock waveform model prepared in advance; calculating a knock intensity; determining occurrence of knocking in accordance with the calculated coefficient of correlation and the knock intensity; and determining no occurrence of knocking in accordance with the calculated coefficient of correlation and the knock intensity.