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:
Oct. 28, 2008
Filed:
Jun. 13, 2007
Masatomo Yoshihara, Toyota, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Senda, Okazaki, JP;
Yuuichi Takemura, Anjo, JP;
Shuhei Oe, Kariya, JP;
Masatomo Yoshihara, Toyota, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Senda, Okazaki, 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 a step of calculating a correlation coefficient K representing a degree of agreement between a vibration waveform and a knock waveform model, a step of calculating a knock magnitude N by dividing a peak value P of magnitude in the vibration waveform by BGL, a step of determining whether knocking has occurred based on a combination of the correlation coefficient K and the knock magnitude N, in such a manner as to determine that knocking has not occurred in at least one of the case where the correlation coefficient K is smaller than a threshold value K() and the case where the knock magnitude N is smaller than a threshold value N(), and a step of retarding ignition timing by a retarding amount corresponding to the combination of the correlation coefficient K and the knock magnitude N, if knocking has occurred.