发明授权
- 专利标题： Exhaust gas purification apparatus of internal combustion engine and catalyst for purifying exhaust gas internal combustion engine
- 专利标题（中）： 内燃机废气净化装置及净化废气内燃机催化剂
-
申请号： US202243申请日： 1998-12-10
-
公开(公告)号： US6161378A公开(公告)日： 2000-12-19
- 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： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-146981 19960610; JPX8-153718 19960614; JPX8-209587 19960808; JPX9-013655 19970128
- 主分类号： F01N3/20
- IPC分类号： F01N3/20 ; B01D53/94 ; F01N3/08 ; F02D41/02 ; F02D41/14 ; F01N3/00
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 NO.sub.x gas passes, and a catalyst disposed in the exhaust gas duct such that it contacts the exhaust gas. The catalyst chemically adsorbs NO.sub.x 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 NO.sub.x, adsorbed NO.sub.x 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.