公开(公告)号：US08806851B2

公开(公告)日：2014-08-19

申请号：US12680338

申请日：2008-09-09

申请人： Cyrill Kammer ,  Berthold Keppeler ,  Jochen Lahr ,  Markus Paule ,  Anke Traebert ,  Nicole Werquet ,  Axel Zuschlag

发明人： Cyrill Kammer ,  Berthold Keppeler ,  Jochen Lahr ,  Markus Paule ,  Anke Traebert ,  Nicole Werquet ,  Axel Zuschlag

IPC分类号： F01N3/00

CPC分类号： F01N3/208 ,  F01N3/0814 ,  F01N3/0842 ,  F01N9/00 ,  F01N2250/12 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

摘要： In a method for reducing the emission of nitrogen dioxide in a motor vehicle having an exhaust gas purification system having an SCR catalytic converter with adsorption centers for nitrogen oxides, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter above an operating temperature. Below the operating temperature, the exhaust gas supplied to the SCR catalytic converter is enriched with a material such that an adsorption of nitrogen oxides is inhibited at corresponding adsorption centers of the SCR catalytic converter. In order to reduce the overall NOx emissions below a first, predeterminable amount, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter and the NO2 portion of the total NOx emissions is reduced below a second, predeterminable amount in that NO2 is converted with hydrocarbons stored in the SCR catalytic converter.

摘要翻译： 在具有具有SCR催化转化器的排气净化系统的具有氮氧化物吸附中心的机动车辆的二氧化氮排放的方法中，将富含氨的废气在工作温度以上供给SCR催化剂。 低于工作温度，供应给SCR催化转化器的废气富含一种材料，使得在SCR催化转化器的相应吸附中心抑制氮氧化物的吸附。 为了将总体NOx排放量降低到低于第一可预定量的条件下，向SCR催化转化器供给富含氨的废气，并且将总NO x排放的NO 2部分降低到可转换的NO2以下的可预定量 碳氢化合物储存在SCR催化转化器中。

公开(公告)号：US20110005199A1

公开(公告)日：2011-01-13

申请号：US12680338

申请日：2008-09-09

申请人： Cyrill Kammer ,  Berthold Keppeler ,  Jochen Lahr ,  Markus Paule ,  Anke Traebert ,  Nicole Werquet ,  Axel Zuschlag

发明人： Cyrill Kammer ,  Berthold Keppeler ,  Jochen Lahr ,  Markus Paule ,  Anke Traebert ,  Nicole Werquet ,  Axel Zuschlag

IPC分类号： F01N3/00

CPC分类号： F01N3/208 ,  F01N3/0814 ,  F01N3/0842 ,  F01N9/00 ,  F01N2250/12 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

摘要： In a method for reducing the emission of nitrogen dioxide in a motor vehicle having an exhaust gas purification system having an SCR catalytic converter with adsorption centers for nitrogen oxides, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter above an operating temperature. Below the operating temperature, the exhaust gas supplied to the SCR catalytic converter is enriched with a material such that an adsorption of nitrogen oxides is inhibited at corresponding adsorption centers of the SCR catalytic converter. In order to reduce the overall NOx emissions below a first, predeterminable amount, an exhaust gas enriched with ammonia is supplied to the SCR catalytic converter and the NO2 portion of the total NOx emissions is reduced below a second, predeterminable amount in that NO2 is converted with hydrocarbons stored in the SCR catalytic converter.

摘要翻译： 在具有具有SCR催化转化器的排气净化系统的具有氮氧化物吸附中心的机动车辆的二氧化氮排放的方法中，将富含氨的废气在工作温度以上供给SCR催化剂。 低于工作温度，供应给SCR催化转化器的废气富含一种材料，使得在SCR催化转化器的相应吸附中心抑制氮氧化物的吸附。 为了将总体NOx排放量降低到低于第一可预定量的条件下，向SCR催化转化器供给富含氨的废气，并且将总NO x排放的NO 2部分降低到可转换的NO2以下的可预定量 碳氢化合物储存在SCR催化转化器中。