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. 15, 1993
Filed:
Apr. 14, 1992
Applicant:
Inventor:
Hideo Urata, Saitama, JP;
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
60274 ; 60299 ; 60301 ; 422172 ; 422180 ;
Abstract
A catalyst body having carried in a carrier a three way conversion catalyst is disposed inside an exhaust pipe near an exit to the atmosphere. An internal combustion engine is operated in a rich range of air/fuel ratio. Reducing reaction of the exhaust gas takes place in a front portion of the catalyst body. Oxidizing reaction takes place in a rear portion of the catalyst body by intermittently introducing atmospheric air into the catalyst body through pulsations of the exhaust gas.