公开(公告)号：US08226914B2

公开(公告)日：2012-07-24

申请号：US12527724

申请日：2008-02-20

申请人： Paul Spurk ,  Stèphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

发明人： Paul Spurk ,  Stèphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

IPC分类号： B01D53/62 ,  B01D53/72 ,  B01D53/94 ,  F01N3/10 ,  F01N3/24

CPC分类号： F01N3/0253 ,  F01N3/035 ,  F01N3/101 ,  F01N3/2803 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2340/02 ,  F01N2430/085 ,  F01N2510/0682 ,  F01N2610/03 ,  Y02T10/22

摘要： Soot filters for removing soot from the exhaust gas of lean-burn engines become blocked with progressive operating duration on account of the deposition of soot, and must therefore be regenerated at regular intervals. It has been found that reliable operation of the soot filter is possible only if an active regeneration is carried out from time to time by increasing the exhaust-gas temperature to the soot ignition temperature. For this purpose, an oxidation catalytic converter is usually arranged upstream of the soot filter, and the exhaust-gas temperature is increased by means of the catalytic combustion of additionally injected fuel. Here, the oxidation catalytic converter is subjected to high temperature loading and therefore ages very quickly. It has surprisingly been found that the ageing of the oxidation catalytic converter can be slowed if said oxidation catalytic converter is split into at least two separate catalytic converters and the distance between said separate catalytic converters is 2 to 30 mm.

摘要翻译： 由于烟灰的沉积，用于从贫燃发动机的废气中除去烟灰的烟尘过滤器随着逐渐运行的持续时间而被阻塞，因此必须以规则的间隔再生。 已经发现，仅当通过将废气温度升高到烟灰点火温度来不时地进行主动再生时，烟灰过滤器的可靠操作才是可能的。 为此，氧化催化转化器通常设置在烟尘过滤器的上游，并且通过附加喷射的燃料的催化燃烧来增加废气温度。 这里，氧化催化转化器经受高温负载，因此老化非常快。 令人惊讶地发现，如果所述氧化催化转化器被分成至少两个单独的催化转化器并且所述单独的催化转化器之间的距离为2至30mm，则氧化催化转化器的老化可以减慢。

公开(公告)号：US20100095658A1

公开(公告)日：2010-04-22

申请号：US12527724

申请日：2008-02-20

申请人： Paul Spurk ,  Stéphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

发明人： Paul Spurk ,  Stéphanie Frantz ,  Thomas Le Tallec ,  Olivier Teysset ,  Wilfried Mueller ,  Gerald Jeske

IPC分类号： F01N3/10

CPC分类号： F01N3/0253 ,  F01N3/035 ,  F01N3/101 ,  F01N3/2803 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2340/02 ,  F01N2430/085 ,  F01N2510/0682 ,  F01N2610/03 ,  Y02T10/22

摘要： Soot filters for removing soot from the exhaust gas of lean-burn engines become blocked with progressive operating duration on account of the deposition of soot, and must therefore be regenerated at regular intervals. It has been found that reliable operation of the soot filter is possible only if an active regeneration is carried out from time to time by increasing the exhaust-gas temperature to the soot ignition temperature. For this purpose, an oxidation catalytic converter is usually arranged upstream of the soot filter, and the exhaust-gas temperature is increased by means of the catalytic combustion of additionally injected fuel. Here, the oxidation catalytic converter is subjected to high temperature loading and therefore ages very quickly. It has surprisingly been found that the ageing of the oxidation catalytic converter can be slowed if said oxidation catalytic converter is split into at least two separate catalytic converters and the distance between said separate catalytic converters is 2 to 30 mm.

摘要翻译： 由于烟灰的沉积，用于从贫燃发动机的废气中除去烟灰的烟尘过滤器随着逐渐运行的持续时间而被阻塞，因此必须以规则的间隔再生。 已经发现，仅当通过将废气温度升高到烟灰点火温度来不时地进行主动再生时，烟灰过滤器的可靠操作才是可能的。 为此，氧化催化转化器通常设置在烟尘过滤器的上游，并且通过附加喷射的燃料的催化燃烧来增加废气温度。 这里，氧化催化转化器经受高温负载，因此老化非常快。 令人惊讶地发现，如果所述氧化催化转化器被分成至少两个单独的催化转化器并且所述单独的催化转化器之间的距离为2至30mm，则氧化催化转化器的老化可以减慢。