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:
Sep. 20, 2011
Filed:
Jun. 27, 2007
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;
Yuuichi Takemura, Anjo, JP;
Shuhei Oe, Kariya, 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;
Yuuichi Takemura, Anjo, 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 executes a program including calculating a correlation coefficient by dividing the sum of respective absolute values, which are each a difference between a magnitude in an engine vibration waveform and a magnitude in a knock waveform model for every crank angle, by an area corresponding to magnitudes equal to or larger than a positive reference value in the knock waveform model, and determining whether or not knocking has occurred based on the correlation coefficient.