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    Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction
    2.
    发明授权
    Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction 失效
    多级还原剂注射策略为无Slip，高效选择性催化还原

    公开(公告)号：US06996975B2

    公开(公告)日：2006-02-14

    申请号：US10877598

    申请日：2004-06-25

    Applicant: Subbaraya Radhamohan ,  Michael Eugene Crane

    Inventor： Subbaraya Radhamohan ,  Michael Eugene Crane

    IPC: F01N3/00

    CPC classification number: F01N3/2066 ,  F01N3/0814 ,  F01N13/0097 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

    Abstract: One aspect of the invention relates to an exhaust treatment apparatus having an NOx reduction system comprising first and second catalyst beds in series with associated first and second ammonia injectors. The first catalyst bed with its associated ammonia injector preferably targets removing only about 80 to about 95% percent of the NOx in the vehicle exhaust. The second catalyst bed with its associated injector preferably target removing about 70 to about 100% of the remaining NOx. Staging the reduction system in this manner improves control over NOx reduction and reduces the risk of ammonia slip. Other aspects of the invention relate to methods of treating vehicle exhaust to remove NOx and an SCR reactor comprising a housing having an entrance port, an exit port, and an ammonia injection port, wherein the injection port is configured to inject ammonia in between SCR catalyst beds contained in the housing.

    Abstract translation: 本发明的一个方面涉及一种排气处理装置，其具有包括与相关联的第一和第二氨喷射器串联的第一和第二催化剂床的NO x x还原系统。 具有其相关联的氨喷射器的第一催化剂床优选地仅去除车辆尾气中的约80％至约95％的NO x。 具有其相关联的喷射器的第二催化剂床优选地目标是去除剩余的NO x的大约70％至大约100％。 以这种方式进行还原系统的分级改进了对减少NOx排放的控制，并降低了氨的滑移风险。 本发明的其它方面涉及处理车辆排气以除去NO x和SCR反应器的方法，SCR反应器包括具有入口，出口和氨注入口的壳体，其中注入口为 构造成在包含在壳​​体中的SCR催化剂床之间注入氨。

    MULTISTAGE REDUCTANT INJECTION STRATEGY FOR SLIPLESS, HIGH EFFICIENCY SELECTIVE CATALYTIC REDUCTION
    4.
    发明申请
    MULTISTAGE REDUCTANT INJECTION STRATEGY FOR SLIPLESS, HIGH EFFICIENCY SELECTIVE CATALYTIC REDUCTION 失效
    多级减少注射策略，无效，高效选择性催化还原

    公开(公告)号：US20050284134A1

    公开(公告)日：2005-12-29

    申请号：US10877598

    申请日：2004-06-25

    Applicant: Subbaraya Radhamohan ,  Michael Crane

    Inventor： Subbaraya Radhamohan ,  Michael Crane

    IPC: F01N3/00 ,  F01N3/08 ,  F01N3/10 ,  F01N3/20 ,  F01N13/02

    CPC classification number: F01N3/2066 ,  F01N3/0814 ,  F01N13/0097 ,  F01N2610/02 ,  Y02A50/2325 ,  Y02T10/24

    Abstract: One aspect of the invention relates to an exhaust treatment apparatus having an NOx reduction system comprising first and second catalyst beds in series with associated first and second ammonia injectors. The first catalyst bed with its associated ammonia injector preferably targets removing only about 80 to about 95% percent of the NOx in the vehicle exhaust. The second catalyst bed with its associated injector preferably target removing about 70 to about 100% of the remaining NOx. Staging the reduction system in this manner improves control over NOx reduction and reduces the risk of ammonia slip. Other aspects of the invention relate to methods of treating vehicle exhaust to remove NOx and an SCR reactor comprising a housing having an entrance port, an exit port, and an ammonia injection port, wherein the injection port is configured to inject ammonia in between SCR catalyst beds contained in the housing.

    Abstract translation: 本发明的一个方面涉及一种具有NOx还原系统的排气处理装置，其包括与相关联的第一和第二氨喷射器串联的第一和第二催化剂床。 具有其相关联的氨喷射器的第一催化剂床优选地仅去除车辆排气中的约80至约95％的NOx。 具有其相关联的喷射器的第二催化剂床优选地目标是去除剩余NOx的约70至约100％。 以这种方式分级还原系统可以改善对NOx还原的控制，并降低氨的滑移风险。 本发明的其它方面涉及处理车辆废气以除去NOx的方法以及包括具有入口，出口和氨注入口的壳体的SCR反应器，其中所述注入口构造成在SCR催化剂之间注入氨 房屋中包含的床。

    Optimal fuel profiles
    5.
    发明申请
    Optimal fuel profiles 失效
    最佳燃油曲线

    公开(公告)号：US20080022664A1

    公开(公告)日：2008-01-31

    申请号：US11494372

    申请日：2006-07-27

    Applicant: Johannes Walter Reuter ,  Subbaraya Radhamohan ,  Dmitry Arie Shamis ,  Christian Thomas Chimner

    Inventor： Johannes Walter Reuter ,  Subbaraya Radhamohan ,  Dmitry Arie Shamis ,  Christian Thomas Chimner

    IPC: F01N3/00 ,  F01N3/10

    CPC classification number: F01N3/0842 ,  B01D53/90 ,  B01D53/9409 ,  B01D53/9495 ,  B01D2251/2062 ,  B01D2251/208 ,  B01D2258/012 ,  F01N3/0821 ,  F01N3/0871 ,  F01N13/0097 ,  F01N13/02 ,  F01N2250/12 ,  F01N2570/14 ,  F01N2610/04 ,  F02D41/0275 ,  Y02A50/2325 ,  Y02T10/24

    Abstract: A method is provided for regenerating a LNT in a diesel engine exhaust aftertreatment system. Typically, the aftertreatment system comprises a fuel reformer, a LNT, and a SCR catalyst in that order. Over the course of the regeneration, the concentration or flow rate of syn gas is increased, peaked, and then reduced. Preferably, the syn gas concentration or flow rate and the fuel reformer temperature are simultaneously controlled using at least a fuel injector and an engine intake air throttle. The pattern of increasing the syn gas concentration or flow rate during a first part of the regeneration and decreasing the syn gas concentration of flow rate in a latter part of the regeneration reduces the fuel penalty for the regeneration and improves the ammonia production rate as compared to a system in which the syn gas concentration or flow rate is essentially constant throughout the regeneration.

    Abstract translation: 提供了一种用于在柴油发动机排气后处理系统中再生LNT的方法。 通常，后处理系统依次包括燃料重整器，LNT和SCR催化剂。 在再生过程中，合成气的浓度或流量增加，峰值，然后降低。 优选地，使用至少燃料喷射器和发动机进气节流阀同时控制合成气浓度或流量和燃料重整器温度。 在再生的第一部分中增加合成气体浓度或流量的模式，并且在再生后期部分降低合成气体流速浓度降低了再生的燃料损失，并且提高了氨生产率，与 其中合成气浓度或流速在整个再生过程中基本上恒定的系统。

    Solenoid driver circuit
    8.
    发明申请
    Solenoid driver circuit 审中-公开
    电磁线圈驱动电路

    公开(公告)号：US20070188967A1

    公开(公告)日：2007-08-16

    申请号：US11351508

    申请日：2006-02-10

    Applicant: Stephen Smith ,  Subbaraya Radhamohan ,  Thomas Stoltz

    Inventor： Stephen Smith ,  Subbaraya Radhamohan ,  Thomas Stoltz

    IPC: H01H47/32 ,  H01H47/00

    CPC classification number: H01F7/1816 ,  H01F7/1811 ,  H01F2007/1822 ,  H01F2007/1888

    Abstract: A solenoid drive circuit includes a boost energy storage device, such as a capacitor, that captures energy from and discharges energy to a solenoid. Switches control the connection between the boost device, the solenoid, and a power source. This allows the solenoid response time to be variable based on the characteristics of the boost device as well as the solenoid. By providing two different solenoid current rise and decay rates and by capturing and re-using energy stored in the solenoid, the inventive drive circuit enhances solenoid response and increases efficiency.

    Abstract translation: 螺线管驱动电路包括诸如电容器的升压能量存储装置，其捕获能量并将能量释放到螺线管。 开关控制升压装置，螺线管和电源之间的连接。 这允许基于升压装置以及螺线管的特性来改变电磁铁响应时间。 通过提供两种不同的电磁升高和衰减速率以及通过捕获和重新使用存储在螺线管中的能量，本发明的驱动电路增强了电磁线圈响应并提高了效率。

    Strategy for controlling NOx emissions and ammonia slip in an SCR system using a nonselective NOx/NH3
    9.
    发明申请
    Strategy for controlling NOx emissions and ammonia slip in an SCR system using a nonselective NOx/NH3 审中-公开
    使用非选择性NOx / NH3控制SCR系统中NOx排放和氨滑移的策略

    公开(公告)号：US20050282285A1

    公开(公告)日：2005-12-22

    申请号：US10872659

    申请日：2004-06-21

    Applicant: Subbaraya Radhamohan ,  Michael Crane

    Inventor： Subbaraya Radhamohan ,  Michael Crane

    IPC: B01D53/90 ,  B01D53/94 ,  F01N3/20 ,  F01N3/28 ,  G01N35/08

    CPC classification number: F01N3/2066 ,  B01D53/90 ,  B01D53/9431 ,  B01D2251/2062 ,  F01N3/208 ,  F01N3/281 ,  F01N3/2828 ,  F01N3/2832 ,  F01N9/00 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2900/0402 ,  F01N2900/0408 ,  F01N2900/0411 ,  F01N2900/14 ,  F01N2900/1616 ,  F01N2900/1622 ,  Y02A50/2325 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/47 ,  Y10T436/12

    Abstract: One aspect of the invention relates to controlling the ammonia feed rate to an SCR reactor using a NOx sensor cross-sensitive to ammonia. The sensor, positioned downstream of the reactor, is interrogated by introducing a pulse in the ammonia feed rate. A positive response to a positive pulse indicates ammonia slip. A negative response to a positive pulse indicates NOx breakthrough. Another aspect of the invention related to a combination of feed-back and feed-forward control. Upon detecting ammonia slip, the controller enters into an ammonia slip recovery mode in which the ammonia feed rate is reduced for a period to restore the reactor's ammonia or NOx buffering capacity. After the recovery period, feed-forward control is restored, optionally with an updated control objective. A further aspect of the invention relates to a learning probabilistic model for feed-forward control trained according to the occurrence or non-occurrence of NOx breakthrough and ammonia slip.

    Abstract translation: 本发明的一个方面涉及使用与氨交叉敏感的NOx传感器来控制向SCR反应器的氨进料速率。 通过引入氨进料速率的脉冲来询问位于反应器下游的传感器。 对正脉冲的正响应表示氨滑移。 对正脉冲的负响应表示NOx突破。 本发明的另一方面涉及反馈和前馈控制的组合。 在检测到氨滑移时，控制器进入氨滑移恢复模式，其中氨进料速率减少一段时间以恢复反应器的氨或NOx缓冲能力。 在恢复期之后，前馈控制被恢复，可选地具有更新的控制目标。 本发明的另一方面涉及根据NOx突破和氨滑脱的发生或不发生而训练的前馈控制的学习概率模型。

    EGR system with improved control logic
    10.
    发明授权
    EGR system with improved control logic 失效
    EGR系统具有改进的控制逻辑

    公开(公告)号：US6012437A

    公开(公告)日：2000-01-11

    申请号：US110165

    申请日：1998-07-06

    Applicant: Subbaraya Radhamohan ,  Mark Leonard ,  David Turner

    Inventor： Subbaraya Radhamohan ,  Mark Leonard ,  David Turner

    IPC: F02D21/08 ,  F02D35/00 ,  F01N9/00 ,  F02M25/07

    CPC classification number: F02D41/0077 ,  F02D21/08 ,  F02D35/0007 ,  Y02T10/47

    Abstract: A control (60) for an EGR valve (24) including an actuator (16) for moving the EGR valve (24) between a closed position and an open position, and a position sensor (48) for detecting the position of the EGR valve (24) and generating a position output signal. A processing circuit (70,72) receives the position output signal and transmits electrical control signals to energize the actuator (16) and move the EGR valve (24). Control logic is implemented whereby, when the EGR valve (24) is moving towards the closed position, the processing circuit (70,72) transmits first electrical control signals for energizing the actuator (16) in a first predetermined manner when the position output signal indicates that the EGR valve (24) is at least a predetermined distance away from the closed position. When the position output signal indicates that the EGR valve (24) is less than the predetermined distance away from the closed position, the processing circuit (70,72) transmits second electrical control signals for energizing the actuator (16) in a second predetermined manner.

    Abstract translation: 一种用于EGR阀（24）的控制装置（60），包括用于在关闭位置和打开位置之间移动EGR阀（24）的致动器（16）和用于检测EGR阀（24）的位置的位置传感器 （24）并产生位置输出信号。 处理电路（70,72）接收位置输出信号并传送电气控制信号以激励致动器（16）并移动EGR阀（24）。 执行控制逻辑，由此当EGR阀（24）朝向关闭位置运动时，处理电路（70,72）在位置输出信号（70,72）处以第一预定方式传送用于激励致动器（16）的第一电气控制信号 表示EGR阀（24）距离关闭位置至少预定的距离。 当所述位置输出信号指示所述EGR阀（24）距离所述关闭位置小于所述预定距离时，所述处理电路（70,72）以第二预定方式传送用于激励所述致动器（16）的第二电气控制信号 。

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