发明申请
- 专利标题： Exhaust emission purification apparatus of compression ignition type internal combustion engine
- 专利标题（中）： 压燃式内燃机排气净化装置
-
申请号： US10542595申请日： 2004-11-29
-
公开(公告)号： US20060053778A1公开(公告)日： 2006-03-16
- 发明人: Takamitsu Asanuma , Shinya Hirota , Tomihisa Oda
- 申请人： Takamitsu Asanuma , Shinya Hirota , Tomihisa Oda
- 申请人地址： JP Toyota-shi
- 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-shi
- 优先权： JP2003-401597 20031201
- 国际申请： PCT/JP04/18087 WO 20041129
- 主分类号： F01N3/00
- IPC分类号： F01N3/00 ; F01N3/10
摘要：
A fuel adding valve (14), an HC adsorbing and oxidation catalyst (11), and a NOx storing catalyst (12) are successively arranged in an exhaust passage of an internal combustion engine toward the downstream side. When the NOx storing catalyst (12) should release NOx, particulate fuel is added from the fuel adding valve (14). This fuel is adsorbed once at the HC adsorbing and oxidation catalyst (11), then gradually evaporates to make the air-fuel ratio of the exhaust gas flowing into the NOx storing catalyst (12) rich. Due to this, NOx is released from the NOx storing catalyst (12).