Invention Grant
- Patent Title: Exhaust gas purification apparatus for an internal combustion engine and a catalyst for purifying exhaust gas
- Patent Title (中): 用于内燃机的废气净化装置和用于净化废气的催化剂
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Application No.: US11634241Application Date: 2006-12-06
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Publication No.: US07772149B2Publication Date: 2010-08-10
- Inventor: Masato Kaneeda , Hidehiro Iizuka , Norihiro Shinotsuka , Masahiro Sakanushi , Kimihiro Tokushima , Hiroki Hosoe , Masayuki Kasuya , Toshio Iwasaki , Shogo Konya
- Applicant: Masato Kaneeda , Hidehiro Iizuka , Norihiro Shinotsuka , Masahiro Sakanushi , Kimihiro Tokushima , Hiroki Hosoe , Masayuki Kasuya , Toshio Iwasaki , Shogo Konya
- Applicant Address: JP Tokyo JP Tokyo JP Tokyo
- Assignee: Hitachi, Ltd.,Honda Motor Co., Ltd.,Nippon Steel Materials Co., Ltd.
- Current Assignee: Hitachi, Ltd.,Honda Motor Co., Ltd.,Nippon Steel Materials Co., Ltd.
- Current Assignee Address: JP Tokyo JP Tokyo JP Tokyo
- Agency: Crowell & Moring LLP
- Priority: JP2005-353146 20051207
- Main IPC: B01J23/02
- IPC: B01J23/02 ; B01J23/50 ; B01J21/10 ; B01J23/04 ; F01N3/10
Abstract:
A Cr trapping agent is disposed so that it contacts with constituting components of the substrate containing Cr. As the Cr trapping agent, an element or Ag is used, wherein the element is stronger in basicity than alkali metals or alkaline earth metals. Since the Cr trapping agent prevents transfer of Cr towards the alkali metals or alkaline earth metals, the reaction between Cr and alkali metals or alkaline earth metals is prevented.
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