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:
Dec. 27, 2005
Filed:
Feb. 04, 2004
Applicant:
Hajime Hosoya, Atsugi, JP;
Inventor:
Hajime Hosoya, Atsugi, JP;
Assignee:
Hitachi, Ltd., Tokyo-to, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M015/00 ;
U.S. Cl.
CPC ...
Abstract
Detection signals from an airflow meter, which outputs different detection signals for the forward flow and reverse flow of the intake air of an engine, are converted into intake air amount data of the same sign. An offset amount is subtracted from the intake air amount data obtained by the conversion process, thereby obtaining intake air amount data in which the forward flow and the reverse flow are distinguished from each other by positive and negative signs.