发明申请
- 专利标题： Exhaust purification device and exhaust purification method of internal combustion engine
- 专利标题（中）： 内燃机排气净化装置及排气净化方法
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申请号： US11989867申请日： 2007-06-22
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公开(公告)号： US20090255233A1公开(公告)日： 2009-10-15
- 发明人: Kohei Yoshida , Kotaro Hayashi , Shinya Hirota , Takamitsu Asanuma , Hiromasa Nishioka , Hiroshi Otsuki
- 申请人： Kohei Yoshida , Kotaro Hayashi , Shinya Hirota , Takamitsu Asanuma , Hiromasa Nishioka , Hiroshi Otsuki
- 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： JP2006-184616 20060704
- 国际申请： PCT/JP2007/063056 WO 20070622
- 主分类号： F01N9/00
- IPC分类号： F01N9/00 ; F01N3/10 ; F01N3/023 ; F01N3/035
摘要：
An SOX trap catalyst (11) in which at least one of an alkali metal and alkali earth metal is carried diffused is arranged in an exhaust passage of an internal combustion engine. By holding the temperature of the SOX trap catalyst (11) during engine operation at the temperature where a nitrate of the at least one of the alkali metal and alkali earth metal becomes the melted state, a nitrate movement and coagulation action where the nitrate in the SOX trap catalyst (11) moves to and coagulates at the surface of the SOX trap catalyst (11) is promoted. Due to this nitrate movement and coagulation action, SOX is removed while restoring the SOX trap rate.
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