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:
Nov. 30, 1999
Filed:
Mar. 30, 1998
Applicant:
Inventors:
Toshikatsu Takanohashi, Wako, JP;
Hiroshi Ohno, Wako, JP;
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60286 ; 60285 ; 60276 ;
Abstract
An air-fuel ratio control system controls the air-fuel ratio of a mixture supplied to an internal combustion engine. An exhaust gas purifying-device arranged in the exhaust system of the engine accommodates a nitrogen oxide absorbent for absorbing nitrogen oxides in exhaust gases emitted from the engine. Nitrogen oxides absorbed by the nitrogen oxide absorbent is reduced by enriching the air-fuel ratio of the mixture supplied to the engine. The degree of the enriching of the air-fuel ratio is set to a larger value as a flow rate or flow velocity of the exhaust gases increases.