Invention Application
- Patent Title: Exhaust gas purifcation apparatus of internal combustion engine and catalyst for purifying exhaust gas of internal combustion engine
- Patent Title (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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Application No.: US10900320Application Date: 2004-07-28
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Publication No.: US20050089456A1Publication Date: 2005-04-28
- Inventor: Hiroshi Hanaoka , Osamu Kuroda , Ryouta Doi , Hidehiro Iizuka , Toshio Ogawa , Hisao Yamashita , Shigeru Azuhata , Yuichi Kitahara , Toshifumi Hiratsuka , Kojiro Okude , Norihiro Shinotsuka , Toshio Manaka
- Applicant: Hiroshi Hanaoka , Osamu Kuroda , Ryouta Doi , Hidehiro Iizuka , Toshio Ogawa , Hisao Yamashita , Shigeru Azuhata , Yuichi Kitahara , Toshifumi Hiratsuka , Kojiro Okude , Norihiro Shinotsuka , Toshio Manaka
- Applicant Address: JP Chiyoda-ku
- Assignee: HITACHI, LTD.
- Current Assignee: HITACHI, LTD.
- Current Assignee Address: JP Chiyoda-ku
- Priority: JP8-146981 19960610; JP8-153718 19960614; JP8-209587 19960808; JP9-13655 19970128
- Main IPC: F01N3/20
- IPC: F01N3/20 ; B01D53/94 ; F01N3/08 ; F02D41/02 ; F02D41/14 ; B01D53/34
Abstract:
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.
Information query
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