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:
Jan. 10, 1995
Filed:
Aug. 04, 1993
Applicant:
Inventor:
Katsuhiko Toyoda, Shizuoka, JP;
Assignee:
Suzuki Motor Corporation, Shizuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60276 ; 60277 ; 60285 ;
Abstract
A catalyst deterioration judging apparatus for an internal combustion engine wherein first and second exhaust sensors are provided on the exhaust passage respectively upstream and downstream of a catalyst material provided in the exhaust passage. A control arrangement determines deterioration of the catalyst by sensing the exhaust gas upstream and downstream of the catalyst, and provides a feedback control for controlling the air-fuel ratio.