发明授权
- 专利标题： Device for purifying the exhaust gas of an internal combustion engine
- 专利标题（中）： 用于净化内燃机废气的装置
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申请号： US10829160申请日： 2004-04-22
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公开(公告)号： US07296401B2公开(公告)日： 2007-11-20
- 发明人: Takamitsu Asanuma , Toshiaki Tanaka , Shinya Hirota , Kazuhiro Itoh , Koichiro Nakatani , Koichi Kimura , Kotaro Hayashi , Souichi Matushita , Yukihiro Tsukasaki
- 申请人： Takamitsu Asanuma , Toshiaki Tanaka , Shinya Hirota , Kazuhiro Itoh , Koichiro Nakatani , Koichi Kimura , Kotaro Hayashi , Souichi Matushita , Yukihiro Tsukasaki
- 申请人地址： JP Toyota
- 专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址： JP Toyota
- 代理机构： Oliff & Berridge, PLC
- 优先权： JP2000-226224 20000721; JP2000-318344 20001018
- 主分类号： F01N3/00
- IPC分类号： F01N3/00
摘要：
A device for purifying the exhaust gas of an internal combustion engine is disclosed. The device includes a particulate filter arranged in the exhaust system, which carries a catalyst for absorbing and reducing NOx. The catalyst absorbs NOx when the air-fuel ratio in the surrounding atmosphere thereof is lean and releases the absorbed NOx to purify NOx by reduction when the air-fuel ratio is stoichiometric or rich. The device further includes a catalytic apparatus for purifying NOx arranged in the exhaust system upstream of the particulate filter, which has an oxidation function.