公开(公告)号：US20020194841A1

公开(公告)日：2002-12-26

申请号：US10134063

申请日：2002-04-26

申请人： Engelhard Corporation

发明人： Mathijs Van Genderen

IPC分类号： F01N003/00 ,  F01N003/10

CPC分类号： F01N3/208 ,  B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/103 ,  F01N5/02 ,  F01N9/005 ,  F01N13/009 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/08 ,  F01N2610/12 ,  F01N2900/0404 ,  F01N2900/14 ,  F01N2900/1402 ,  F01N2900/1622 ,  F01N2900/1808 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

摘要： A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.

摘要翻译： 柴油动力车辆设置有SCR系统，其使用外部还原剂来以考虑到NOx瞬态排放对还原催化剂的影响的方式转换NOx排放。 由发动机产生的实际NOx排放物使用可变的NOx时间常数进行过滤，这又与还原催化剂在其当前温度下的还原剂/ NOx存储容量相关，以考虑归因于NOx瞬态排放的SCR系统的变化。 使用对应于废气的当前空间速度的可变催化剂时间常数来过滤催化剂温度，以解释归因于NOx瞬态排放的催化剂温度的变化。 基于经过过滤校正的还原催化剂温度的以NSR比施加的经过滤的经校正的NOx浓度，计量还原剂。

公开(公告)号：US20020152745A1

公开(公告)日：2002-10-24

申请号：US10133769

申请日：2002-04-26

申请人： Engelhard Corporation

发明人： Joseph A. Patchett ,  Rudolfus Petrus Verbeek ,  Karl Richard Grimston ,  Gary Wayne Rice ,  John Lawrence Calabrese ,  Mathijs Van Genderen

IPC分类号： F01N003/00

CPC分类号： F01N3/208 ,  B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/103 ,  F01N5/02 ,  F01N9/005 ,  F01N13/009 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/08 ,  F01N2610/12 ,  F01N2900/0404 ,  F01N2900/14 ,  F01N2900/1402 ,  F01N2900/1622 ,  F01N2900/1808 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

摘要： A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.

公开(公告)号：US20020148220A1

公开(公告)日：2002-10-17

申请号：US10133716

申请日：2002-04-26

申请人： Engelhard Corporation

发明人： Joseph A. Patchett ,  Rudolfus Petrus Verbeek ,  Karl Richard Grimston ,  Gary Wayne Rice ,  John Lawrence Calabrese ,  Mathijs Van Genderen

IPC分类号： F01N003/00

CPC分类号： F01N3/208 ,  B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  F01N3/103 ,  F01N5/02 ,  F01N9/005 ,  F01N13/009 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/08 ,  F01N2610/12 ,  F01N2900/0404 ,  F01N2900/14 ,  F01N2900/1402 ,  F01N2900/1622 ,  F01N2900/1808 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

摘要： A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.

摘要翻译： 柴油动力车辆设置有SCR系统，其使用外部还原剂来以考虑到NOx瞬态排放对还原催化剂的影响的方式转换NOx排放。 由发动机产生的实际NOx排放物使用可变的NOx时间常数进行过滤，这又与还原催化剂在其当前温度下的还原剂/ NOx存储容量相关，以考虑归因于NOx瞬态排放的SCR系统的变化。 使用对应于废气的当前空间速度的可变催化剂时间常数来过滤催化剂温度，以解释归因于NOx瞬态排放的催化剂温度的变化。 基于经过过滤校正的还原催化剂温度的以NSR比施加的经过滤的经校正的NOx浓度，计量还原剂。