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:
Jun. 21, 2011
Filed:
Oct. 31, 2008
Rihito Kaneko, Nishikamo-gun, JP;
Hiroto Tanaka, Toyota, JP;
Satoshi Watanabe, Okazaki, JP;
Norihito Hanai, Toyota, JP;
Yasuhiro Yamasako, Toyota, JP;
Kenji Senda, Okazaki, JP;
Satoshi Masuda, Kariya, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Hiroto Tanaka, Toyota, JP;
Satoshi Watanabe, Okazaki, JP;
Norihito Hanai, Toyota, JP;
Yasuhiro Yamasako, Toyota, JP;
Kenji Senda, Okazaki, JP;
Satoshi Masuda, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Denso Corporation, Kariya-shi, JP;
Abstract
A 90° integrated value calculating unit of an engine ECU calculates a 90° integrated value obtained by integrating a magnitude. A calculating unit calculates a knock magnitude by dividing 90° integrated value by a BGL. A value obtained by subtracting a standard deviation σ from a median value of 90° integrated value is determined as the BGL. An ignition timing control unit controls the ignition timing depending on whether knock magnitude is equal to or larger than a determination value. A median value calculating unit calculates median value of 90° integrated value. A standard deviation calculating unit calculates standard deviation of 90° integrated value. A first stop unit stops updating of median value and standard deviation when 90° integrated value is smaller than a first threshold value or is equal to or larger than a second threshold value.