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Method for reducing nitrous oxide emissions from an internal combustion engine and exhaust aftertreatment system
Method for reducing nitrous oxide emissions from an internal combustion engine and exhaust aftertreatment system
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机译：减少内燃机和排气后处理系统中氧化亚氮排放的方法
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摘要
The invention relates to a method for reducing nitrous oxide emissions in an exhaust system (20) of an internal combustion engine (10). The exhaust (18) of the internal combustion engine (10) is connected to the exhaust system (20). In the exhaust system (20), a nitrogen oxide storage component (28, 30, 32) is present in the direction of flow of an exhaust stream of the internal combustion engine (10),Downstream of the nitrogen oxide storage component (28, 30, 32) an electric heating device (34) and downstream of the electric heating device (34) an oxidation catalyst (38) is arranged. It is provided that the temperatures (TNS, TOX) of the nitrogen oxide storage component (28, 30, 32) and the oxidation catalyst (38) are determined, an operating state of the internal combustion engine (10) is determined, and the electric heating device (34) is activated, when the temperatures (TNS, TOX) and the operating condition of the internal combustion engine (10) indicate the formation of nitrous oxide at least one of the exhaust aftertreatment components (28, 30, 32, 38).The invention further relates to an exhaust aftertreatment system for carrying out such a method.
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