公开(公告)号：US07351677B2

公开(公告)日：2008-04-01

申请号：US10630303

申请日：2003-07-29

申请人： Friedemann Rohr ,  Peter Kattwinkel ,  Stefan D. Peter ,  Thomas Kreuzer ,  Egbert Lox

发明人： Friedemann Rohr ,  Peter Kattwinkel ,  Stefan D. Peter ,  Thomas Kreuzer ,  Egbert Lox

IPC分类号： B01J20/34

CPC分类号： F02D41/0275 ,  B01D53/9495 ,  B01D53/96 ,  F01N3/0885 ,  F01N2430/06 ,  F01N2560/026 ,  Y02T10/20

摘要： The present invention provides a process and a device for regeneration of a nitrogen oxide storage catalyst in the exhaust system of a diesel engine. The process comprises a first and a second regeneration strategy. The first regeneration strategy is applied when the exhaust gas temperature is above a threshold value and comprises changing the air/fuel-ratio from a lean to a rich value during a first regeneration period. The second regeneration strategy is applied when the exhaust gas temperature is below a threshold value and comprises switching the air/fuel-ratio back and forth between lean and rich air/fuel-ratios, forming a sequence of between 2 and 10 rich pulses and between 2 and 10 lean pulses during a second regeneration period.

摘要翻译： 本发明提供一种用于在柴油发动机的排气系统中再生氮氧化物存储催化剂的方法和装置。 该方法包括第一和第二再生策略。 当废气温度高于阈值时，应用第一再生策略，并且包括在第一再生期间将空气/燃料比从贫值改变为浓值。 当废气温度低于阈值时，应用第二再生策略，并且包括在稀空燃比之间来回切换空燃比，形成富二脉冲之间的序列，介于 在第二再生期间的2和10个贫脉冲。

公开(公告)号：US20060270548A1

公开(公告)日：2006-11-30

申请号：US11498014

申请日：2006-08-02

申请人： Marcus Pfeifer ,  Barry van Stetten ,  Christian Kuhn ,  Roger Staab ,  Lutz Ruwisch ,  Peter Kattwinkel ,  Jurgen Gieshoff ,  Egbert Lox ,  Thomas Kreuzer

发明人： Marcus Pfeifer ,  Barry van Stetten ,  Christian Kuhn ,  Roger Staab ,  Lutz Ruwisch ,  Peter Kattwinkel ,  Jurgen Gieshoff ,  Egbert Lox ,  Thomas Kreuzer

IPC分类号： B01J23/00

CPC分类号： B01D53/944 ,  B01D53/96 ,  B01J23/58 ,  F01N3/0231 ,  F01N3/035 ,  F01N2430/085 ,  F02D41/029 ,  F02D41/405 ,  Y02T10/44 ,  Y10S502/524

摘要： The present invention is directed to a particle filter to remove soot from the exhaust gas of a diesel engine. The particle filter contains a catalytically active coating on a filter body to accelerate burn-off during a regeneration phase of the soot particles collected on the filter. The particle filter comprises a catalytic coating containing compounds of barium, compounds of magnesium, and at least one element of the platinum group metals. The invention is further directed to a process for accelerated combustion of soot particles collected on the filter from lean exhaust gas of a diesel engine in which the soot particles have a soot ignition temperature and the particle filter is actively regenerated from time to time by raising the temperature of the particle filter above the soot ignition temperature and burning off the soot particles.

摘要翻译： 本发明涉及一种用于从柴油发动机的废气中除去烟灰的颗粒过滤器。 颗粒过滤器在过滤器主体上包含催化活性涂层，以在收集在过滤器上的烟灰颗粒的再生阶段期间加速燃烧。 颗粒过滤器包括含有钡化合物，镁化合物和至少一种铂族金属元素的催化涂层。 本发明进一步涉及一种用于从柴油发动机的稀薄排气中收集在过滤器上的烟灰颗粒加速燃烧的方法，其中烟灰颗粒具有烟灰点火温度，并且颗粒过滤器不时地通过升高 颗粒过滤器的温度高于烟灰点燃温度并燃烧掉烟灰颗粒。

公开(公告)号：US07351382B2

公开(公告)日：2008-04-01

申请号：US10397984

申请日：2003-03-26

申请人： Marcus Pfeifer ,  Barry van Stetten ,  Christian Kühn ,  Roger Staab ,  Lutz Marc Ruwisch ,  Peter Kattwinkel ,  Jürgen Geishoff ,  Egbert Lox ,  Thomas Kreuzer

发明人： Marcus Pfeifer ,  Barry van Stetten ,  Christian Kühn ,  Roger Staab ,  Lutz Marc Ruwisch ,  Peter Kattwinkel ,  Jürgen Geishoff ,  Egbert Lox ,  Thomas Kreuzer

IPC分类号： B01D50/00 ,  B01J23/58 ,  B01J23/00 ,  B01J21/00 ,  B01J20/00

CPC分类号： B01D53/944 ,  B01D53/96 ,  B01J23/58 ,  F01N3/0231 ,  F01N3/035 ,  F01N2430/085 ,  F02D41/029 ,  F02D41/405 ,  Y02T10/44 ,  Y10S502/524

摘要： The present invention is directed to a particle filter to remove soot from the exhaust gas of a diesel engine. The particle filter contains a catalytically active coating on a filter body to accelerate bum-off during a regeneration phase of the soot particles collected on the filter. The particle filter comprises a catalytic coating containing compounds of barium, compounds of magnesium, and at least one element of the platinum group metals. The invention is further directed to a process for accelerated combustion of soot particles collected on the filter from lean exhaust gas of a diesel engine in which the soot particles have a soot ignition temperature and the particle filter is actively regenerated from time to time by raising the temperature of the particle filter above the soot ignition temperature and burning off the soot particles.

摘要翻译： 本发明涉及一种用于从柴油发动机的废气中除去烟灰的颗粒过滤器。 颗粒过滤器在过滤器主体上包含催化活性涂层，以在收集在过滤器上的烟灰颗粒的再生阶段加速碰撞。 颗粒过滤器包括含有钡化合物，镁化合物和至少一种铂族金属元素的催化涂层。 本发明进一步涉及一种用于从柴油发动机的稀薄排气中收集在过滤器上的烟灰颗粒加速燃烧的方法，其中烟灰颗粒具有烟灰点火温度，并且颗粒过滤器不时地通过升高 颗粒过滤器的温度高于烟灰点燃温度并燃烧掉烟灰颗粒。