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公开(公告)号:US09719446B2
公开(公告)日:2017-08-01
申请号:US14917860
申请日:2014-08-20
发明人: Frank Adam , Stephan Eckhoff , Sebastian Mueller
CPC分类号: F02D41/1446 , F01N3/0807 , F01N3/0814 , F01N3/0842 , F01N3/0871 , F01N3/101 , F01N2260/04 , F01N2570/14 , F01N2570/145 , F02D41/0275 , Y02A50/2344 , Y02C20/10 , Y02T10/22
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.