发明授权
- 专利标题: Method of manufacturing an exhaust gas purifying filter
- 专利标题(中): 废气净化过滤器的制造方法
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申请号: US11727438申请日: 2007-03-27
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公开(公告)号: US07553442B2公开(公告)日: 2009-06-30
- 发明人: Mamoru Nishimura , Mikio Ishihara , Hirofumi Yamashita , Hiromi Sano
- 申请人: Mamoru Nishimura , Mikio Ishihara , Hirofumi Yamashita , Hiromi Sano
- 申请人地址: JP Kariya
- 专利权人: Denso Corporation
- 当前专利权人: Denso Corporation
- 当前专利权人地址: JP Kariya
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2001-093412 20010328; JP2002-032780 20020208
- 主分类号: B28B3/20
- IPC分类号: B28B3/20
摘要:
An exhaust gas purifying filter is made of a ceramic material in a honeycomb structure having introduction passages for introducing exhaust gas that includes particulate matter emitted from an internal combustion engine, porous walls that collect the particulate matter and exhaust passages for exhausting the exhaust gas after the particulate matter has been removed therefrom, with the porous walls supporting a catalyst for oxidizing and removing the particulate matter. The porosity of the porous wall is in a range from 55 to 80%, the mean pore size is in-a range from 30 to 50 μm, and the total volume X of the pores included in the exhaust gas purifying filter and the volume Y of the pores that are not smaller than 100 μm satisfy the relation of inequality Y/X≦0.05.
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