- 专利标题： Reduction of N2O in the exhaust gas of lean-burn petrol engines
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申请号： US14917860申请日： 2014-08-20
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公开(公告)号： US09719446B2公开(公告)日： 2017-08-01
- 发明人: Frank Adam , Stephan Eckhoff , Sebastian Mueller
- 申请人： UMICORE AG AND CO. KG
- 申请人地址： DE Hanau-Wolfgang
- 专利权人： UMICORE AG & CO. KG
- 当前专利权人： UMICORE AG & CO. KG
- 当前专利权人地址： DE Hanau-Wolfgang
- 代理机构： Smith, Gambrell & Russell, LLP
- 优先权： DE102013218234 20130911
- 国际申请： PCT/EP2014/067705 WO 20140820
- 国际公布： WO2015/036208 WO 20150319
- 主分类号： F01N3/00
- IPC分类号： F01N3/00 ; F02D41/14 ; F01N3/08 ; F01N3/10 ; F02D41/02
摘要：
The present invention relates to the use of different regeneration strategies for nitrogen oxide storage catalysts (NOx storage catalyst, LNT or NSC), depending on the exhaust gas temperatures, to reduce in the total exhaust gas the greenhouse gas N2O (nitrous oxide) that is produced as a secondary emission during the regeneration of the storage catalyst. If the exhaust gas temperature is below 275° C.-290° C., regeneration takes place using a strategy with short pulses of around 2 seconds and λ Lambda 0.95 rich.
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