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:
Aug. 16, 1988
Filed:
Dec. 04, 1986
Applicant:
Inventor:
Takuro Morozumi, Mitaka, JP;
Assignee:
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123520 ;
Abstract
An air-fuel ratio control system for an engine has integrating means for integrating an error signal which is the difference between a reference voltage and an output voltage of an O.sub.2 -sensor and for producing an integration signal. In response to the integration signal, the air-fuel ratio is controlled to a desired value. When fuel vapor in a canister of the engine is purged, an integration constant of the integrating means is increased for a predetermined time in order to allow a deviation of the air-fuel ratio to quickly converge.