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. 08, 2008
Filed:
Aug. 02, 2005
Koichiro Shinozaki, Saitama-ken, JP;
Katsura Okubo, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Masahiro Sato, Saitama-ken, JP;
Koichiro Shinozaki, Saitama-ken, JP;
Katsura Okubo, Saitama-ken, JP;
Yuji Yasui, Saitama-ken, JP;
Masahiro Sato, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A method of calculating the amount of work done by an internal combustion engine, which is capable of calculating a work amount parameter indicative of the amount of work done with accuracy while compensating for a phase delay in in-cylinder pressure data caused e.g. by a filtering process performed thereon. The method calculates the work amount parameter Pindicative of the amount of work done by the engineincluding a combustion chamber, as follows: Pressure in the combustion chamberis detected to obtain in-cylinder pressure data P indicative of the detected pressure. Volume data V indicative of a state of change in volume of the combustion chamberis obtained. The obtained volume data V is subjected to a first predetermined filtering process. The work amount parameter Pis calculated based on the detected in-cylinder pressure data P, and the volume data filtered value VF obtained by subjecting the volume data V to the first filtering process.