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。

公开(公告)号：US20020023433A1

公开(公告)日：2002-02-28

申请号：US09924461

申请日：2001-08-09

发明人： Christian Goerigk ,  Michael Illek ,  Stefan Wessels

IPC分类号： F01N003/00

CPC分类号： F01N3/2066 ,  B01D53/9431 ,  B01D53/9495 ,  F01N2610/02 ,  F01N2610/12 ,  Y02T10/24

摘要： The present invention concerns a method and a system for feeding a reducing agent into a catalyst device. A first reservoir is provided and has a solid reducing agent, a second reservoir is provided and has a solvent for the solid reducing agent, and a reducing agent solution is produced from the solid reducing agent and the solvent. The reducing agent solution is intermittently stored in a third reservoir, and the reducing agent solution is fed from the third reservoir into the catalyst device.

摘要翻译： 本发明涉及将还原剂进料到催化剂装置中的方法和系统。 提供第一储存器并具有固体还原剂，提供第二储存器并具有固体还原剂的溶剂，并且由固相还原剂和溶剂产生还原剂溶液。 将还原剂溶液间歇地储存在第三储存器中，还原剂溶液从第三储存器进料到催化剂装置中。