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. 19, 2009
Filed:
Mar. 21, 2007
Akira Kiyomura, Isesaki, JP;
Hisanori Ozaki, Tokyo, JP;
Akira Kiyomura, Isesaki, JP;
Hisanori Ozaki, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Fuji Heavy Industries Ltd., Tokyo, JP;
Abstract
A technique of controlling an air-fuel ration for an engine, in which an air-fuel ratio feedback correction coefficient α to correct an amount of fuel injection into the engine is computed based on an output from an air-fuel ratio sensor disposed on an upstream side of a catalytic converter. A gain of the air-fuel ratio feedback correction coefficient α in respect to a detection result of the air-fuel ratio sensor is decreased as a delay in a transient response of the air-fuel ratio sensor occurs. Thus, an excessive increase in the amount of fuel injection immediately after fuel cuts is prevented.