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:
Aug. 19, 2008
Filed:
Apr. 26, 2006
Shuhei Oe, Kariya-shi, JP;
Kiyoshi Iwade, Okazaki-shi, JP;
Nobuyuki Murate, Okazaki-shi, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Yuichi Takemura, Anjo-shi, JP;
Shigeru Kamio, Nagoya-shi, JP;
Shuhei Oe, Kariya-shi, JP;
Kiyoshi Iwade, Okazaki-shi, JP;
Nobuyuki Murate, Okazaki-shi, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Yuichi Takemura, Anjo-shi, JP;
Shigeru Kamio, Nagoya-shi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Denso Corporation, Kariya-shi, JP;
Nippon Soken, Inc., Nishio-shi, JP;
Abstract
An engine ECU executes a program including the steps of: detecting a vibration corresponding to a first radial resonance mode by using a band-pass filter, from vibrations sensed by an in-cylinder pressure sensor provided at an upper central portion of the cylinder; calculating knock intensity N based on a result of comparison between the detected waveform and a knock waveform model prepared in advance as a vibration waveform when knocking occurs; determining that knocking occurred when the knock intensity N is larger than a predetermined reference value; and determining that knocking has not occurred when the knock intensity N is not larger than the predetermined reference value.