Invention Grant
- Patent Title: Reduction of N2O in the exhaust gas of lean-burn petrol engines
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Application No.: US14917860Application Date: 2014-08-20
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Publication No.: US09719446B2Publication Date: 2017-08-01
- Inventor: Frank Adam , Stephan Eckhoff , Sebastian Mueller
- Applicant: UMICORE AG AND CO. KG
- Applicant Address: DE Hanau-Wolfgang
- Assignee: UMICORE AG & CO. KG
- Current Assignee: UMICORE AG & CO. KG
- Current Assignee Address: DE Hanau-Wolfgang
- Agency: Smith, Gambrell & Russell, LLP
- Priority: DE102013218234 20130911
- International Application: PCT/EP2014/067705 WO 20140820
- International Announcement: WO2015/036208 WO 20150319
- Main IPC: F01N3/00
- IPC: F01N3/00 ; F02D41/14 ; F01N3/08 ; F01N3/10 ; F02D41/02
Abstract:
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.
Public/Granted literature
- US20160222901A1 REDUCTION OF N2O IN THE EXHAUST GAS OF LEAN-BURN PETROL ENGINES Public/Granted day:2016-08-04
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