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. 09, 2010
Filed:
Oct. 01, 2007
Shuhei Oe, Kariya, JP;
Kouzi Ohara, Aichi-ken, JP;
Satoshi Masuda, Kariya, JP;
Yuuichi Takemura, Anjo, JP;
Rihito Kaneko, Aichi-ken, JP;
Kenji Kasashima, Aichi-ken, JP;
Masatomo Yoshihara, Toyota, JP;
Kenji Senda, Okazaki, JP;
Norihito Hanai, Toyota, JP;
Yasuhiro Yamasako, Toyota, JP;
Shuhei Oe, Kariya, JP;
Kouzi Ohara, Aichi-ken, JP;
Satoshi Masuda, Kariya, JP;
Yuuichi Takemura, Anjo, JP;
Rihito Kaneko, Aichi-ken, JP;
Kenji Kasashima, Aichi-ken, JP;
Masatomo Yoshihara, Toyota, JP;
Kenji Senda, Okazaki, JP;
Norihito Hanai, Toyota, JP;
Yasuhiro Yamasako, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Denso Corporation, Kariya-shi, JP;
Nippon Soken, Inc., Nishio-shi, JP;
Abstract
An engine ECU executes: calculating 15-degrees integrated value integrating vibration intensity for each of six crank angle ranges; detecting an amount of change in the 15-degrees integrated value between ignition cycles; specifying two ranges having larger amounts of change; specifying a crank angle having intensity larger than that of a neighboring crank angle in a search range determined to be the same as the specified ranges; calculating a coefficient of correlation K corresponding to a difference between a vibration waveform and a knock waveform model while the specified crank angle is matched with a timing at which intensity peaks in the knock waveform model; and, if the coefficient of correlation K is larger than a threshold value K(), determining that knock has occurred.