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. 15, 2009
Filed:
Jan. 25, 2007
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Masatomo Yoshihara, Toyota, JP;
Koji Aso, Susono, JP;
Kenji Senda, Okazaki, JP;
Yuichi Takemura, Anjo, JP;
Shuhei Oe, Kariya, JP;
Kiyoshi Iwade, Okazaki, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Masatomo Yoshihara, Toyota, JP;
Koji Aso, Susono, JP;
Kenji Senda, Okazaki, JP;
Yuichi Takemura, Anjo, JP;
Shuhei Oe, Kariya, JP;
Kiyoshi Iwade, Okazaki, 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, when an absolute value of a difference between a determination value V(KX) used for determining presence or absence of knocking and a maximum value V(MAX) of magnitude value LOG(V), which is obtained by logarithmically converting a magnitude V detected based on a signal sent from a knock sensor, is greater than the product of a standard deviation σ and a coefficient U(3) in a frequency distribution of magnitude values LOG(V) for N cycle(s), setting a value obtained by adding the product of the standard deviation σ and the coefficient U(3) to the maximum value V(MAX) of the magnitude value LOG(V) as the determination value V(KX).