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. 26, 2010
Filed:
May. 28, 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, Aichi-Ken, JP;
Denso Corporation, Achi-Ken, JP;
Nippon Soken, Inc, Aichi-Ken, JP;
Abstract
An engine ECU executes a program including a step of setting a search range of the crank angle of a peak value P that is the largest integrated value in a vibration waveform of an engine detected by calculating integrated values that are integrals of output voltage values of a knock sensor for every five degrees of a crank angle such that the search range may include the crank angle increasing with increase in engine speed NE, and a step of detecting the crank angle of the largest integrated value in the search range, and setting the detected crank angle as the crank angle of peak value P in the vibration waveform. At the crank angle based on the crank angle of peak value P, the vibration waveform is compared with a knock waveform model.