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    Diesel particulate matter reduction system
    1.
    发明申请
    Diesel particulate matter reduction system 有权
    柴油颗粒物减少系统

    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。

    Method for regenerating a diesel particulate filter
    4.
    发明申请
    Method for regenerating a diesel particulate filter 审中-公开
    再生柴油微粒过滤器的方法

    公开(公告)号：US20060236680A1

    公开(公告)日：2006-10-26

    申请号：US11284143

    申请日：2005-11-21

    申请人： Wenzhong Zhang ,  Theodore Angelo

    发明人： Wenzhong Zhang ,  Theodore Angelo

    IPC分类号： F01N3/10 ,  F01N3/00

    CPC分类号： F01N3/035 ,  F01N3/0231 ,  F01N3/0253 ,  F01N2250/02

    摘要： A method is disclosed for regenerating a diesel particulate filter without excessively increasing NO2 emissions. The system includes a fuel delivery device, an oxidation catalyst, and a diesel particulate filter. During a first operational mode, the fuel injection device injects a relatively smaller amount of fuel into the exhaust stream to reduce the capacity of the oxidation catalyst to oxidize NO in the exhaust stream to NO2. At a determined time, a second operational mode is initiated where a relatively larger amount of fuel is injected into the exhaust stream and is oxidized within the oxidation catalyst, thereby raising the exhaust temperature sufficiently to combust substantially all of the soot trapped on the diesel particulate filter.

    摘要翻译： 公开了一种用于再生柴油微粒过滤器的方法，而不会过度增加NO 2排放。 该系统包括燃料输送装置，氧化催化剂和柴油微粒过滤器。 在第一操作模式期间，燃料喷射装置将相对较少量的燃料喷射到排气流中以降低氧化催化剂将排气流中的NO氧化为NO 2的能力。 在确定的时间，开始第二操作模式，其中相对较大量的燃料被注入排气流中并在氧化催化剂内被氧化，从而足够地提高废气温度以燃烧基本上所有被捕获在柴油颗粒上的烟灰 过滤。