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:
Nov. 27, 2007
Filed:
Nov. 08, 2005
Katsura Okubo, Saitama, JP;
Yuji Yasui, Saitama, JP;
Masahiro Sato, Saitama, JP;
Koichiro Shinozaki, Saitama, JP;
Kosuke Higashitani, Saitama, JP;
Katsura Okubo, Saitama, JP;
Yuji Yasui, Saitama, JP;
Masahiro Sato, Saitama, JP;
Koichiro Shinozaki, Saitama, JP;
Kosuke Higashitani, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An in-cylinder pressure sensor for outputting a signal corresponding to an internal cylinder pressure of an engine is provided. A first signal and a second signal are extracted from the output signal of the in-cylinder pressure sensor. The first signal has a frequency band corresponding to knocking of the engine. The second signal has a frequency band used for detecting a peak of the internal cylinder pressure. A knocking detection period is set based on the second signal. The first signal in the knocking detection period is examined to determine whether or not knocking has occurred.