公开(公告)号：US20070240406A1

公开(公告)日：2007-10-18

申请号：US11725578

申请日：2007-03-19

申请人： Wenzhong Zhang ,  Todd Taubert ,  Timothy Ricke ,  Julian Imes

发明人： Wenzhong Zhang ,  Todd Taubert ,  Timothy Ricke ,  Julian Imes

IPC分类号： F01N3/00 ,  F01N3/02

CPC分类号： B01D53/9431 ,  B01D46/2451 ,  B01D46/247 ,  B01D46/527 ,  B01D2046/2492 ,  B01D2267/40 ,  B01D2279/30 ,  F01N3/0222 ,  F01N3/0226 ,  F01N3/0231 ,  F01N3/035 ,  F01N3/2821 ,  F01N13/009 ,  F01N13/0093 ,  F01N2330/02 ,  F01N2330/06 ,  F01N2330/10 ,  F01N2330/38 ,  F01N2330/44 ,  F01N2330/60 ,  F01N2430/00 ,  F01N2510/06 ,  F01N2510/0682

摘要： A system for treating diesel exhaust is disclosed. The system includes a first filter including layers of filtration material positioned between layers of corrugated metallic foil. The metallic foil defines a honeycomb arrangement of longitudinal passageways from an upstream end to a downstream end and also openings for allowing exhaust to pass between adjacent longitudinal passageways of the metallic foil. The filtration material is positioned such that exhaust between the adjacent longitudinal passageways passes through the filtration material. The metallic foil also includes flow diverting structures to divert flow within the longitudinal passageways through the openings. A second filter is positioned downstream from the first filter. The second filter defines a honeycomb arrangement of longitudinal passageways. The longitudinal passages are selectively plugged adjacent upstream and downstream ends to force flow radially through walls between the longitudinal passages of the second filter.

摘要翻译： 公开了一种用于处理柴油机排气的系统。 该系统包括第一过滤器，其包括位于波纹状金属箔层之间的过滤材料层。 金属箔限定了从上游端到下游端的纵向通道的蜂窝结构，还包括允许排气在金属箔的相邻纵向通道之间通过的开口。 过滤材料定位成使得相邻纵向通道之间的排气通过过滤材料。 金属箔还包括流动分流结构，以使纵向通道内的流动流过开口。 第二过滤器位于第一过滤器的下游。 第二过滤器限定了纵向通道的蜂窝结构。 纵向通道在上游端和下游端被选择性地堵塞，以迫使径向通过第二过滤器的纵向通道之间的壁流动。

公开(公告)号：US20060236684A1

公开(公告)日：2006-10-26

申请号：US11373497

申请日：2006-03-10

申请人： Wenzhong Zhang ,  Julian Imes ,  Todd Taubert ,  Timothy Ricke ,  Theodore Angelo

发明人： Wenzhong Zhang ,  Julian Imes ,  Todd Taubert ,  Timothy Ricke ,  Theodore Angelo

IPC分类号： F01N3/00 ,  F01N3/10

CPC分类号： F01N3/0231 ,  B01D53/9459 ,  B01D2255/102 ,  B01D2255/50 ,  B01D2255/915 ,  B01D2258/012 ,  F01N3/035 ,  F01N13/009 ,  F01N13/0093 ,  F01N2250/02 ,  F01N2330/02 ,  F01N2330/12 ,  F01N2330/325 ,  F01N2330/38 ,  F01N2330/42

摘要： A diesel exhaust treatment system is disclosed that includes first and second diesel particulate reduction devices. The first diesel particulate reduction device is located upstream in the exhaust flow and contains an oxidation catalyst coating. The second particulate reduction device is located downstream from the first particulate reduction device and is generally non-catalyzed or lightly catalyzed. Each particulate reduction device comprises a flow-through fabric-type filtration media with substantial internal turbulence. As exhaust gas passes through the catalyzed upstream particulate reduction device, nitric oxide (NO) is oxidized to form nitrogen dioxide (NO2), a portion of which interacts with the particulate trapped within the upstream diesel particulate reduction device to regenerate the upstream device. A remaining portion of exhaust gas containing NO2 enters the downstream diesel particulate reduction device, where an additional portion interacts with the trapped particulate to regenerate the device. The relative volume weighted efficiency of the upstream particulate reduction device and of the downstream particulate reduction device are selected to optimize the overall system particle capture efficiency and backpressure, as well as to balance the amount of NO2 made with the amount of NO2 consumed so as to minimize NO2 emissions.

摘要翻译： 公开了一种包括第一和第二柴油颗粒减少装置的柴油机排气处理系统。 第一柴油颗粒减少装置位于废气流的上游并且包含氧化催化剂涂层。 第二颗粒减少装置位于第一颗粒还原装置的下游，并且通常是非催化的或轻微的催化的。 每个颗粒还原装置包括具有实质内部湍流的流通织物型过滤介质。 当废气通过催化的上游颗粒还原装置时，一氧化氮（NO）被氧化以形成二氧化氮（NO 2 H 2），其一部分与捕获在上游柴油颗粒还原物内的颗粒相互作用 设备重新生成上游设备。 含有NO 2 N 2的排气的剩余部分进入下游柴油颗粒还原装置，其中附加部分与捕获的颗粒相互作用以再生装置。 选择上游颗粒还原装置和下游颗粒还原装置的相对体积加权效率以优化整个系统颗粒捕获效率和背压，以及平衡由下列颗粒还原装置制备的NO 2 2 / 消耗的NO 2量的量以使NO 2排放最小化。