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. 16, 2008
Filed:
Mar. 11, 2003
Masaaki Ashida, Yokohama, JP;
Kouichi Mori, Ayase, JP;
Shunichi Mitsuishi, Isehara, JP;
Kimiyoshi Nishizawa, Yokohama, JP;
Yoshinao Ugomori, Isehara, JP;
Masaaki Ashida, Yokohama, JP;
Kouichi Mori, Ayase, JP;
Shunichi Mitsuishi, Isehara, JP;
Kimiyoshi Nishizawa, Yokohama, JP;
Yoshinao Ugomori, Isehara, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A hydrocarbon trapping layer () is formed by coating a hydrocarbon trapping material onto a carrier (A). A number of exhaust gas passages () are formed in the carrier (A) and a plurality of slits () are formed on the carrier (A) to cross the passages () in a transverse orientation. The slits () delay temperature increases in the downstream hydrocarbon trapping layer () and delay the release of trapped hydrocarbons therefrom. This is due to blocking the transmission of heat to the downstream hydrocarbon trapping layer () from the upstream hydrocarbon trapping layer (). The slits () further produce a turbulent flow in the flow of exhaust gas and promote diffusion of exhaust gas over the entire surface of the carrier (A).