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:
Apr. 15, 1997
Filed:
Jul. 07, 1995
Applicant:
Inventor:
Akira Uchikawa, Atsugi, JP;
Assignee:
Unisia Jecs Corporation, Atsugi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60276 ; 60285 ; 123696 ;
Abstract
In an air/fuel ratio control system for an internal combustion engine, having a second air/fuel ratio sensor disposed downstream of a catalytic converter, a computing type used for computing a second air/fuel ratio correction quantity in accordance with an output of the second air/fuel ratio sensor is switched in such a manner that the second air/fuel ratio quantity is set larger when the output of the second air/fuel ratio sensor is outside a reference level range than when the output of the second air/fuel ratio sensor is within the reference level range.