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:
May. 01, 2007
Filed:
Nov. 08, 2005
Katsura Okubo, Saitama, JP;
Yuji Yasui, Saitama, JP;
Masahiro Sato, Saitama, JP;
Koichiro Shinozaki, Saitama, JP;
Katsura Okubo, Saitama, JP;
Yuji Yasui, Saitama, JP;
Masahiro Sato, Saitama, JP;
Koichiro Shinozaki, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An in-cylinder pressure sensor outputs a signal corresponding to a change rate of an internal cylinder pressure of an engine. The output signal of the in-cylinder pressure sensor is filtered so that frequency components lower than frequencies that substantially compose an internal cylinder pressure required for controlling the engine are cut. The filtered output signal is integrated to determine the internal cylinder pressure. Thus, an internal cylinder pressure having no drift can be determined.