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公开(公告)号：US20080282670A1
公开(公告)日：2008-11-20
申请号：US11803204
申请日：2007-05-14
IPC分类号： F01N3/20
CPC分类号： F01N3/0871 , F01N3/2073 , F01N9/00 , F01N13/0097 , F01N2240/30 , Y02T10/20 , Y02T10/47
摘要： In an exhaust aftertreatment system, two LNTs having differing compositions are configured in series downstream from an inline fuel reformer. The downstream LNT is adapted for desulfation at higher temperatures than the upstream LNT. During desulfation, the system develops temperature gradients with the temperatures increasing in the direction of exhaust flow. The ordering of the LNTs is designed utilize these gradients. In a preferred embodiment, the system also includes two SCR catalysts having different compositions. The SCR catalyst with a composition adapted to tolerate higher temperatures is located nearer the downstream end of the system.
摘要翻译： 在废气后处理系统中，具有不同组成的两个LNT被配置为串联燃料重整器的下游串联。 下游LNT适于在比上游LNT更高的温度下脱硫。 在脱硫期间，系统发展温度梯度，其温度随排气方向增加。 设计LNTs的排序利用这些梯度。 在优选的实施方案中，该系统还包括具有不同组成的两种SCR催化剂。 具有适于耐受较高温度的组合物的SCR催化剂位于更接近系统的下游端。
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公开(公告)号：US20100132635A1
公开(公告)日：2010-06-03
申请号：US12697797
申请日：2010-02-01
CPC分类号： F01N3/0814 , F01N3/0842 , F01N3/0885 , F01N3/2066 , F01N9/00 , F01N13/0097 , F01N2240/30 , F01N2560/026 , F01N2560/06 , F01N2560/14 , F01N2610/03 , F01N2610/146 , F01N2900/0422 , F02D41/0245 , F02D41/028 , F02D2200/0802 , F02D2200/0804 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要： Desulfation methods for an exhaust treatment system having a fuel reformer configured upstream of a LNT. Reductant is injected upstream of the fuel reformer. The reductant reacts within the reformer to generate heat, but the system is configured for some reductant to breakthrough and react in the LNT to generate further heat. This configuration allows the LNT to operate at temperatures higher the than first device and facilitates independent control of the LNT and first device temperatures.
摘要翻译： 具有配置在LNT上游的燃料重整器的废气处理系统的脱硫方法。 在燃料重整器的上游注入还原剂。 还原剂在重整器内反应产生热量，但是该系统被配置为使一些还原剂在LNT中穿透并反应以产生进一步的热量。 该配置允许LNT在高于第一器件的温度下操作，并且促进对LNT和第一器件温度的独立控制。
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公开(公告)号：US20110185708A1
公开(公告)日：2011-08-04
申请号：US12696685
申请日：2010-01-29
CPC分类号： F01N3/0871 , F01N3/0814 , F01N3/0842 , F01N11/002 , F01N13/0097 , F01N2240/30 , F01N2250/02 , F01N2250/12 , F01N2560/026 , F01N2560/06 , F01N2570/04 , F01N2570/14 , F01N2610/03 , Y02A50/2344 , Y02T10/24 , Y02T10/47
摘要： The exhaust from a diesel-fueled internal combustion engine is treated by a lean NOX trap. The maximum temperature used for desulfating the lean NOX trap is kept relatively lower during early life and progressively increased as the trap ages. Designing for adequate late life performance entails excess capacity during early life. The method utilizes the excess capacity available during early life to slow aging of the trap and thereby extend the trap lifetime. The method facilitates meeting durability requirements for diesel-powered vehicles with exhaust aftertreatment.
摘要翻译： 来自柴油燃料的内燃机的排气由贫NOx排气管理。 用于脱硫贫NOX捕集器的最高温度在早期生活中保持相对较低，并随着捕集器的老化而逐渐增加。 设计足够的晚年生活表现在早期生活中需要过多的能力。 该方法利用早期可用的过剩容量来减缓陷阱的老化，从而延长陷阱寿命。 该方法有助于满足具有排气后处理的柴油动力车辆的耐久性要求。
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公开(公告)号：US20090025367A1
公开(公告)日：2009-01-29
申请号：US11880950
申请日：2007-07-25
IPC分类号： F01N3/20
CPC分类号： F01N3/0885 , B01D53/9409 , B01D53/9495 , B01D2251/208 , B01D2258/012 , F01N3/0814 , F01N3/0871 , F01N3/2073 , F01N3/208 , F01N13/0097 , F01N2240/30 , F01N2560/026 , F01N2610/03 , F01N2610/146 , F01N2900/1621 , Y02T10/24
摘要： A lean NOX trap is a diesel exhaust aftertreatment system is selectively denitrated in a manner that addresses unreliability of NOX sensor data. According to one concept, data from a NOX is ignored or given decreased weight in a period immediately following a denitration. According to another concept, denitration is made contingent on both a first and a second criteria being met. The first criteria relates to the amount of NOX stored in the LNT or remaining NOX storage capacity of the LNT. The second criteria relates to the current performance of the exhaust treatment system, or a portion thereof, as determined from one or more measurements of NOX concentration in the exhaust. This reduces premature denitrations and associated unnecessary fuel expenditures resulting from inaccurate NOX concentration data and transient events
摘要翻译： 精益NOX捕集器是以解决NOX传感器数据的不可靠性的方式选择性地脱硝柴油机排气后处理系统。 根据一个概念，来自NOX的数据被忽略，或者在脱氮之后的时间段内减轻重量。 根据另一个概念，脱硝是根据符合第一和第二标准而进行的。 第一个标准涉及储存在LNT中的NOX量或LNT的剩余NOX储存容量。 第二标准涉及排气处理系统的当前性能，或其一部分，其根据排气中的一氧化氮浓度的一个或多个测量结果确定。 这可以减少由于不准确的NOX浓度数据和瞬态事件导致的过早脱硝和相关的不必要的燃料费用
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公开(公告)号：US20110011060A1
公开(公告)日：2011-01-20
申请号：US12762157
申请日：2010-04-16
CPC分类号： F01N3/0814 , F01N3/2033 , F01N3/2073 , F01N13/009 , F01N13/082 , F01N2240/30 , F01N2570/14 , F01N2610/03 , Y02A50/2325 , Y02A50/2344 , Y02T10/24 , Y02T10/26
摘要： An exhaust aftertreatment system having a NOX absorber-catalyst and an ammonia-SCR reactor. During regenerations, the NOX absorber-catalyst generates ammonia. The ammonia-SCR reactor captures this ammonia and later uses it to reduce NOX. A Venturi is provided in an exhaust conduit connecting the NOX absorber-catalyst to the ammonia-SCR reactor. The Venturi draws sufficient air to keep the ammonia-SCR reactor under lean conditions throughout the NOX absorber-catalyst regenerations. Maintaining lean conditions for the ammonia-SCR reactor in this manner mitigates poisoning of the ammonia-SCR reactor by hydrocarbons slipping from the NOX absorber-catalyst during the regenerations. Mitigating this poisoning improves the performance of the exhaust aftertreatment system and reduce the loss of useful ammonia to oxidation.
摘要翻译： 具有NO x吸收剂 - 催化剂和氨-SCR反应器的排气后处理系统。 在再生过程中，NO x吸收剂 - 催化剂产生氨。 氨 - SCR反应器捕获这种氨，后来用它来还原NOX。 在连接NOX吸收剂 - 催化剂与氨-SCR反应器的排气导管中设置文丘里管。 文丘里管在NOX吸收器 - 催化剂再生过程中吸入足够的空气以将氨SCR反应器保持在贫态条件下。 以这种方式维持氨-SCR反应器的贫乏条件通过在再生期间从NOX吸收剂 - 催化剂中滑落的烃来减轻氨-SCR反应器的中毒。 减轻这种中毒提高了排气后处理系统的性能，并减少了有用氨的氧化损失。
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公开(公告)号：US20100077734A1
公开(公告)日：2010-04-01
申请号：US12632581
申请日：2009-12-07
CPC分类号： F01N3/0253 , F01N3/0842 , F01N3/0885 , F01N3/106 , F01N3/36 , F01N9/002 , F01N13/0097 , F01N2240/30 , F01N2410/00 , F01N2560/06 , F01N2560/14 , F01N2610/03 , F01N2610/14 , F01N2610/1453 , F02B37/00 , Y02A50/2325 , Y02T10/47
摘要： A diesel exhaust aftertreatment system comprises an LNT within an exhaust line. A low thermal mass DPF and a low thermal mass fuel reformer are configured within the exhaust line upstream from the LNT. A thermal mass is configured downstream from the fuel reformer and the DPF, but upstream from the LNT. For LNT denitration, the fuel reformer is rapidly heated and then used to catalyze steam reforming. The DPF is also rapidly heat each time the fuel reformer is heated and the LNT denitrated. The system operates to regenerate the DPF each time the LNT is denitrated. Preferably, a second DPF is provided to augment the performance of the first DPF. Preferably, the first DPF is small and of the flow through type whereas the second DPF is much larger and of the wall flow filter type. The second DPF can be used as the thermal mass.
摘要翻译： 柴油机废气后处理系统包括在排气管线内的LNT。 低热量DPF和低热质量燃料重整器配置在LNT上游的排气管线内。 热质量被配置在燃料重整器和DPF的下游，但是在LNT的上游。 对于LNT脱硝，燃料重整器被快速加热，然后用于催化蒸汽重整。 每当燃料重整器被加热并且LNT脱硝时，DPF也快速加热。 每次LNT脱硝时，系统都会对DPF进行再生。 优选地，提供第二DPF以增强第一DPF的性能。 优选地，第一DPF小且流通型，而第二DPF远大于壁流式过滤器类型。 第二个DPF可以用作热质量。
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7.发明申请公开(公告)号：US20080314031A1
公开(公告)日：2008-12-25
申请号：US11820315
申请日：2007-06-19
申请人： Dmitry Arie Shamis , James Edward McCarthy, JR. , Johannes Walter Reuter , Karen Evelyn Bevan , Christian Thomas Chimner
发明人： Dmitry Arie Shamis , James Edward McCarthy, JR. , Johannes Walter Reuter , Karen Evelyn Bevan , Christian Thomas Chimner
IPC分类号： F01N3/18
CPC分类号： F01N3/2066 , F01N3/0842 , F01N3/0871 , F01N13/0097 , F01N2240/30 , F01N2560/026 , F01N2610/03 , F01N2900/08 , F02D41/0275 , F02D2200/1012 , F02D2250/36 , Y02T10/24
摘要： A lean NOX trap is a diesel exhaust aftertreatment system is selectively denitrated based on a measure relating to the state and/or the performance of the exhaust aftertreatment system, or a portion thereof comprising the lean NOX trap, reaching a critical value. The critical value is varied according to the demands currently being place on the exhaust aftertreatment system. In one embodiment, the critical value is set based on engine speed-load information. The method regenerates more frequently when exhaust aftertreatment demands are high and less frequently when demands are low. The method improves aftertreatment performance while reducing aftertreatment fuel penalty.
摘要翻译： 贫NOX捕集器是基于与排气后处理系统的状态和/或性能相关的措施或其包含贫NOX捕集器的部分达到临界值的柴油排气后处理系统进行选择性脱硝。 临界值根据排气后处理系统当前的要求而有所不同。 在一个实施例中，临界值基于发动机转速负载信息来设定。 当废气后处理需求高时，该方法更频繁地再生，当需求低时，该方法不太频繁。 该方法提高后处理性能，同时降低后处理燃料处罚。
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