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:
Sep. 19, 2006
Filed:
Mar. 28, 2003
Hirohisa Suwabe, Fukuoka-ken, JP;
Takashi Takakura, Tokyo, JP;
Satoshi Makita, Tokyo, JP;
Hiroshi Funabashi, Tokyo, JP;
Hirohisa Suwabe, Fukuoka-ken, JP;
Takashi Takakura, Tokyo, JP;
Satoshi Makita, Tokyo, JP;
Hiroshi Funabashi, Tokyo, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Hino Motors, Ltd., Tokyo, JP;
Abstract
A ceramic honeycomb filter comprising a ceramic honeycomb structure having porous partition walls defining a plurality of flow paths, and plugs disposed inside the flow paths such that an exhaust gas passes through pores of the porous partition walls, thereby removing particulates from the exhaust gas; a catalyst being carried at least partially on the partition walls and/or the plugs; and at least one of plugs on the side of exhaust gas inlets being disposed at a position separate from the inlet-side opening ends of the flow paths. Particulates are removed from the exhaust gas by injecting unburned fuel and/or hydrocarbon in a gaseous state upstream of the inlet-side plugs to maintain at least part of the inlet-side plugs and their downstream regions at a temperature substantially equal to or higher than the lowest activation temperature of the catalyst.