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:
Mar. 02, 2010
Filed:
Jun. 28, 2006
Masatomo Yoshihara, Toyota, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Koji Aso, Susono, JP;
Kenji Senda, Okazaki, JP;
Yuichi Takemura, Anjo, JP;
Kiyoshi Iwade, Okazaki, JP;
Shuhei Oe, Kariya, JP;
Masatomo Yoshihara, Toyota, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Koji Aso, Susono, JP;
Kenji Senda, Okazaki, JP;
Yuichi Takemura, Anjo, JP;
Kiyoshi Iwade, Okazaki, JP;
Shuhei Oe, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Denso Corporation, Kariya-shi, JP;
Nippon Soken, Inc., Nishio-shi, JP;
Abstract
An engine ECU includes a bandpass filter () extracting only vibrations at a first frequency band A, a bandpass filter () extracting only vibrations at a second frequency band B, a bandpass filter () extracting only vibrations at a third frequency band C, and a bandpass filter () extracting only vibrations at a fourth frequency band D including the first to third frequency bands A-C. The engine ECU determines whether knocking occurred or not based on a vibration waveform of the fourth frequency band D and a peak value in magnitude of vibrations in a synthesized waveform of the first to third frequency bands.