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:
Jul. 31, 2007
Filed:
Dec. 21, 2005
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Kenji Senda, Okazaki, JP;
Shigeru Kamio, Nagoya, JP;
Masaomi Inoue, Kariya, JP;
Yuichi Takemura, Anjo, JP;
Rihito Kaneko, Nishikamo-gun, JP;
Kenji Kasashima, Nishikamo-gun, JP;
Kenji Senda, Okazaki, JP;
Shigeru Kamio, Nagoya, JP;
Masaomi Inoue, Kariya, JP;
Yuichi Takemura, Anjo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
DENSO Corporation, Kariya-shi, JP;
Abstract
An engine ECU executes a program including a step of calculating coefficient of correlation K that is a value related to a deviation between a vibration waveform and a knock waveform model by comparing the engine's vibration waveform with the knock waveform model stored in advance at a plurality of timings, a step of calculating a knock intensity N as based on a largest coefficient of correlation K among the calculated coefficient of correlation Ks, a step of determining that the engine knocks if knock intensity N is larger than a predetermined reference value (YES at S), and a step of determining that the engine does not knock if knock intensity N is not larger than a predetermined reference value (NO at S).