发明名称 |
EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE |
摘要 |
In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged. The concentration of hydrocarbons which flows into the exhaust purification catalyst (13) is made to vibrate by within a predetermined range of amplitude of a 200 ppm or more and within a predetermined range of period of 5 second or less, whereby the NO x which is contained in exhaust gas is reduced at the exhaust purification catalyst (13). At this time, the nitrogen-containing intermediate which is produced in the NO x reduction process is exhausted from the exhaust purification catalyst (13). An intermediate purification catalyst (14) for removal of the exhausted nitrogen-containing intermediate is arranged downstream of the exhaust purification catalyst (13). |
申请公布号 |
EP2460990(A1) |
申请公布日期 |
2012.06.06 |
申请号 |
EP20100848629 |
申请日期 |
2010.08.30 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
BISAIJI, YUKI;YOSHIDA, KOHEI;INOUE, MIKIO |
分类号 |
F01N3/08;B01D53/94;F01N3/20;F01N3/28;F01N3/36;F01N9/00 |
主分类号 |
F01N3/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|