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. 10, 2006
Filed:
Feb. 07, 2005
Katsura Okubo, Saitama, JP;
Koichiro Shinozaki, Saitama, JP;
Yuji Yasui, Saitama, JP;
Masahiro Sato, Saitama, JP;
Keiichi Nagashima, Saitama, JP;
Katsura Okubo, Saitama, JP;
Koichiro Shinozaki, Saitama, JP;
Yuji Yasui, Saitama, JP;
Masahiro Sato, Saitama, JP;
Keiichi Nagashima, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An apparatus for detecting an in-cylinder pressure of an engine is provided. The apparatus comprises an in-cylinder pressure sensor for outputting a signal indicating a change rate of an in-cylinder pressure and a control unit. The control unit is configured to correct the signal from the in-cylinder pressure sensor, integrate the corrected signal to determine the in-cylinder pressure, determine a change rate of a drift contained in the determined in-cylinder, and feedback the change rate of the drift so that the correction of the signal is made with the change rate of the drift. Since the output of the in-cylinder pressure sensor from which a drift has been removed is integrated, it is prevented that a drift appears in the in-cylinder pressure obtained by the integral. A resetting operation is not required so as to remove a drift.