发明申请
- 专利标题： Exhaust gas purifcation apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine
- 专利标题（中）： 内燃机废气净化装置和内燃机废气净化催化剂
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申请号： US10900320申请日： 2004-07-28
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公开(公告)号： US20050089456A1公开(公告)日： 2005-04-28
- 发明人: Hiroshi Hanaoka , Osamu Kuroda , Ryouta Doi , Hidehiro Iizuka , Toshio Ogawa , Hisao Yamashita , Shigeru Azuhata , Yuichi Kitahara , Toshifumi Hiratsuka , Kojiro Okude , Norihiro Shinotsuka , Toshio Manaka
- 申请人： Hiroshi Hanaoka , Osamu Kuroda , Ryouta Doi , Hidehiro Iizuka , Toshio Ogawa , Hisao Yamashita , Shigeru Azuhata , Yuichi Kitahara , Toshifumi Hiratsuka , Kojiro Okude , Norihiro Shinotsuka , Toshio Manaka
- 申请人地址： JP Chiyoda-ku
- 专利权人： HITACHI, LTD.
- 当前专利权人： HITACHI, LTD.
- 当前专利权人地址： JP Chiyoda-ku
- 优先权： JP8-146981 19960610; JP8-153718 19960614; JP8-209587 19960808; JP9-13655 19970128
- 主分类号： F01N3/20
- IPC分类号： F01N3/20 ; B01D53/94 ; F01N3/08 ; F02D41/02 ; F02D41/14 ; B01D53/34
摘要：
An exhaust gas purification apparatus for use in an internal combustion engine comprises an exhaust gas duct connected to the engine through which exhaust gas containing NOx gas passes, and a catalyst disposed in the exhaust gas duct such that it contacts the exhaust gas. The catalyst chemically adsorbs NOx when a stoichiometric amount of a gaseous oxidizing agent present in the exhaust gas is larger than that of a gaseous reducing agent present in the exhaust gas for reducing NOx, adsorbed NOx is catalytically reduced in the presence of a reducing agent when the stoichiometric amount of the oxidizing agent is not larger that of the reducing agent.
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