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:
Jun. 10, 1997
Filed:
Nov. 15, 1995
Applicant:
Inventor:
Yasunari Seki, Wako, JP;
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60277 ;
Abstract
A catalyst deterioration-detecting system for an internal combustion engine detects deterioration of a catalyst arranged in an exhaust passage of the engine based on the output from an oxygen concentration sensor arranged in the exhaust passage at a location downstream of the catalyst, during execution of air-fuel ratio control. The detection of deterioration of the catalyst is effected based on a value of a catalyst deterioration parameter indicative of a degree of deterioration of the catalyst, and an amount of variation in an air-fuel ratio control amount used in the air-fuel ratio control.