发明授权
US08327625B2 Method for regenerating soot filters in the exhaust gas system of a lean mix engine, and exhaust gas system therefor
有权
在稀混合发动机的废气系统中再生烟灰过滤器的方法及其废气系统
- 专利标题： Method for regenerating soot filters in the exhaust gas system of a lean mix engine, and exhaust gas system therefor
- 专利标题（中）： 在稀混合发动机的废气系统中再生烟灰过滤器的方法及其废气系统
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申请号： US12525190申请日： 2008-01-31
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公开(公告)号： US08327625B2公开(公告)日： 2012-12-11
- 发明人: Stephan Eckhoff , Ina Grisstede , Wilfried Mueller , Thomas Kreuzer
- 申请人： Stephan Eckhoff , Ina Grisstede , Wilfried Mueller , Thomas Kreuzer
- 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： Kalow & Springut LLP
- 优先权： EP07002040 20070131
- 国际申请： PCT/EP2008/000771 WO 20080131
- 国际公布： WO2008/092691 WO 20080807
- 主分类号： F01N3/023
- IPC分类号： F01N3/023 ; F01N3/10
摘要：
To adhere to legal exhaust-gas regulations, the exhaust gases of a lean-burn engine must be freed from soot particles and nitrogen oxides. It is proposed that the cylinders of the lean-burn engine be divided into two groups which discharge their exhaust gases into two associated exhaust lines which each comprise a soot filter and which are merged at an opening-in point into a common exhaust line. The common exhaust line comprises the catalytic converter for the removal of the nitrogen oxides. By regenerating the two soot filters at different times, the exhaust-gas temperature in the common exhaust line is limited to a mean temperature between the exhaust-gas temperature of normal operation and that of regeneration operation, and the catalytic converter for the removal of the nitrogen oxides is preserved.