Invention Grant
- Patent Title: Honeycomb filter and method for manufacturing honeycomb filter
- Patent Title (中): 蜂窝过滤器及蜂窝过滤器制造方法
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Application No.: US13292890Application Date: 2011-11-09
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Publication No.: US08420020B2Publication Date: 2013-04-16
- Inventor: Tomoyuki Takagi , Takashi Mizutani
- Applicant: Tomoyuki Takagi , Takashi Mizutani
- Applicant Address: JP Nagoya
- Assignee: NGK Insulators, Ltd.
- Current Assignee: NGK Insulators, Ltd.
- Current Assignee Address: JP Nagoya
- Agency: Burr & Brown
- Priority: JP2010-081903 20100331
- Main IPC: B01D50/00
- IPC: B01D50/00

Abstract:
A honeycomb filter includes a plurality of porous partition portions each forming a cell, which is open at one end and closed at the other end and serves as an exhaust gas flow path, and a trapping layer, for trapping and removing solid components contained in the exhaust gas, formed on each of the partition portions. At least part of each of the partition portions is loaded with a catalyst. The amount of catalyst a (g/L) in an upstream partition portion and the amount of catalyst b (g/L) in a downstream partition portion satisfy 1.05≦a/b≦3.00. A method for limiting a/b to this range includes the entire honeycomb structure, including the partition portions, into contact with a catalyst component to form a catalyst, and subsequently bringing only an upstream region of the honeycomb structure into contact with a catalyst component to form a catalyst.
Public/Granted literature
- US20120058020A1 HONEYCOMB FILTER AND METHOD FOR MANUFACTURING HONEYCOMB FILTER Public/Granted day:2012-03-08
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