公开(公告)号：US20050178110A1

公开(公告)日：2005-08-18

申请号：US10778651

申请日：2004-02-12

申请人： Rahul Mital ,  Bradlee Stroia ,  S. Huang ,  Robert Yu

发明人： Rahul Mital ,  Bradlee Stroia ,  S. Huang ,  Robert Yu

IPC分类号： F01N3/00 ,  F01N3/023 ,  F01N3/035 ,  F01N3/08 ,  F01N3/10 ,  F01N3/36 ,  F01N3/38 ,  F01N9/00 ,  F01N13/02 ,  F01N13/04

CPC分类号： F01N9/00 ,  F01N3/023 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/0871 ,  F01N3/0878 ,  F01N3/36 ,  F01N3/38 ,  F01N13/009 ,  F01N13/011 ,  F01N2410/04 ,  F01N2510/065 ,  F01N2560/026 ,  F01N2570/04 ,  F01N2570/12 ,  F01N2570/14 ,  F01N2610/03 ,  F01N2610/14 ,  Y02A50/2344 ,  Y02T10/47

摘要： The invention provides a NOx adsorber aftertreatment system for internal combustion engines which utilizes at least one precat operatively coupled to at least one NOx adsorber to aid in the regeneration of the NOx adsorber. Fuel is injected into a precat located upstream of a NOx absorber producing heat, H2O, and reductants such as CO, HC, and volatile hydrocarbons, which are input into the NOx absorber. The combination of heat, water, and reductants help to efficiently regenerate the NOx Adsorber which in turn releases exhausts products such as CO2 and N2. Regeneration of a NOx adsorber can be performed during periods of reduced exhaust gas flow lowering the fuel penalty associated with NOx adsorber regeneration. The pre-cat, NOx adsorber regenerating aftertreatment system of the present invention may be used with any suitable control system.

摘要翻译： 本发明提供了一种用于内燃机的NOx吸附器后处理系统，其利用至少一个与至少一个NOx吸附器可操作地耦合的预冷器来辅助NOx吸附器的再生。 将燃料注入到产生热的NO x吸收剂上游的预热器，H 2 O和输入到NOx吸收器中的诸如CO，HC和挥发性烃的还原剂。 热，水和还原剂的组合有助于有效地再生NOx吸附器，NOx吸附器又排放诸如CO 2和N 2的排气产物。 NOx吸收器的再生可以在降低与NOx吸附器再生相关的燃料处罚的废气流量减少期间进行。 本发明的预猫，NOx吸附器再生后处理系统可以与任何合适的控制系统一起使用。

公开(公告)号：US20050178107A1

公开(公告)日：2005-08-18

申请号：US10778275

申请日：2004-02-13

申请人： Rahul Mital ,  Bradlee Stroia ,  Robert Yu

发明人： Rahul Mital ,  Bradlee Stroia ,  Robert Yu

IPC分类号： F01N3/00 ,  F01N3/08 ,  F01N3/10

CPC分类号： F01N3/085 ,  F01N3/0842 ,  F01N3/0871 ,  F01N2240/28

摘要： The invention provides a NOx adsorber aftertreatment system for internal combustion engines which utilizes a plasma fuel converter operatively coupled to at least one NOx adsorber to aid in the regeneration of the NOx adsorber. Fuel and engine exhaust is injected into a plasma fuel converter upstream of a NOx absorber producing reductant such as H2, and CO, which are inlet into the NOx absorber. Reductants such as H2 and CO acting along and together help to efficiently regenerate the NOx Adsorber which in turn releases exhausts products such as CO2 and N2. Using the reductants generated by the plasma fuel converter NOx adsorbers, catalytic soot filter, and the like can be regenerated at exhaust temperatures less than 250° C. The plasma fuel converter, NOx adsorber regenerating aftertreatment system of the present invention may be used with any suitable control system.

摘要翻译： 本发明提供一种用于内燃机的NOx吸附器后处理系统，其利用可操作地耦合至少一个NOx吸附器的等离子体燃料转化器来辅助NOx吸附器的再生。 将燃料和发动机排气注入等离子体燃料转化器，该NOx吸收器产生还原剂例如H 2 CO和CO，其进入NOx吸收器。 还原剂如H 2 CO和CO一起作用并且一起有助于有效地再生NOx吸附器，NOx吸附器再次排放产物如CO 2和N 2， SUB>。 使用由等离子体燃料转化器生成的还原剂NOx吸附剂，催化烟灰过滤器等可以在低于250℃的排气温度下再生。本发明的等离子体燃料转化器，NOx吸附剂再生后处理系统可以与任何 合适的控制系统。

公开(公告)号：US20070175206A1

公开(公告)日：2007-08-02

申请号：US11545803

申请日：2006-10-10

申请人： Rahul Mital ,  Bradlee Stroia ,  Scott Cole

发明人： Rahul Mital ,  Bradlee Stroia ,  Scott Cole

IPC分类号： F01N3/00

CPC分类号： F01N3/0871 ,  B01D53/96 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/0878 ,  F01N3/36 ,  F01N3/38 ,  F01N9/00 ,  F01N13/009 ,  F01N13/011 ,  F01N2250/02 ,  F01N2250/12 ,  F01N2250/14 ,  F01N2410/12 ,  F01N2570/04 ,  F01N2570/14 ,  F01N2610/03 ,  F01N2610/14 ,  Y02A50/2344 ,  Y02T10/47

摘要： The present invention provides for an NOx adsorber aftertreatment system for internal combustion engines which utilizes a parallel arrangement of an adsorber catalyst and a bypass. The exhaust flow from the engine is routed through the adsorber during lean operation. At a predetermined regeneration time (for example, when the adsorber catalyst is 20% full), the exhaust gas flow is reduced through the parallel leg that contains the adsorber catalyst to be regenerated (e.g., 20% through the catalyst leg, 80% of the flow to the bypass leg). A quantity of hydrocarbon is injected into the reduced-flow catalyst leg in order to make the mixture rich. Since the flow has been reduced in this leg, only a small fraction of the amount of hydrocarbon that would have been required to make the mixture rich during full flow is required. This will result in a substantial reduction in the fuel penalty incurred for regeneration of the adsorber catalyst. Once the leg has been regenerated, the exhaust flow is switched to flow 100% through the adsorber leg.

摘要翻译： 本发明提供一种利用吸附剂催化剂和旁路的并联排列的内燃机的NOx吸附器后处理系统。 在稀薄运行期间，来自发动机的排气流通过吸附器。 在预定的再生时间（例如，当吸附剂催化剂为20％满时），排气流通过含有待再生的吸附剂催化剂的平行管路（例如，通过催化剂塔的20％，80％ 流向旁路支路）。 为了使混合物富集，将一定量的烃注入减流催化剂载体中。 由于在这条腿上已经减少了流量，所以只需要在全流量期间使混合物富集所需的碳氢化合物的一小部分。 这将导致吸附剂催化剂再生所引起的燃料损失的显着降低。 一旦腿已经被再生，排气流被切换成100％通过吸附器腿。

公开(公告)号：US07784275B2

公开(公告)日：2010-08-31

申请号：US11233978

申请日：2005-09-23

申请人： Chad E. Marlett ,  Rahul Mital

发明人： Chad E. Marlett ,  Rahul Mital

IPC分类号： F01N3/00

CPC分类号： F01N3/023 ,  F01N3/035

摘要： A diesel engine system having an exhaust system with a catalyst and a diesel particulate filter includes a first module that determines a light-off temperature of the catalyst based on an exhaust flow rate (EFR) through the exhaust system and a second module that selectively generates an enable signal based on the light-off temperature and a catalyst temperature. A DPF regeneration sequence is enabled based on said enable signal.

摘要翻译： 具有带有催化剂的排气系统和柴油机微粒过滤器的柴油发动机系统包括：第一模块，其基于通过排气系统的排气流量（EFR）确定催化剂的起燃温度;以及第二模块，其选择性地产生 基于点火温度和催化剂温度的使能信号。 基于所述使能信号启用DPF再生序列。

公开(公告)号：US20080250776A1

公开(公告)日：2008-10-16

申请号：US11735780

申请日：2007-04-16

申请人： David B. Brown ,  Rahul Mital ,  Kasser A. Jaffri ,  Kevin B. Fuqua

发明人： David B. Brown ,  Rahul Mital ,  Kasser A. Jaffri ,  Kevin B. Fuqua

IPC分类号： F01N3/28

CPC分类号： B01F3/04049 ,  B01F5/0473 ,  B01F5/0616 ,  B01F2005/0639 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2240/20 ,  F01N2240/40 ,  F01N2610/02 ,  F01N2610/03 ,  Y02T10/24

摘要： A mixing apparatus mountable within a generally cylindrical passage defined by an exhaust gas conduit of an exhaust gas after-treatment system is provided. The passage includes an outer region and an inner region operable to convey an exhaust stream and a liquid stream, such as a urea stream. The mixing apparatus includes a retainer ring operable to retain the mixing apparatus within the passage. A first plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a first direction to the exhaust stream and urea stream in the outer region of the passage. A second plurality of fins extends from the retainer ring and is operable to impart a rotational velocity component in a second direction, opposite the first direction, to the exhaust stream and urea stream in the inner region of the passage.

摘要翻译： 提供一种可安装在由废气后处理系统的废气导管限定的大致圆柱形通道内的混合装置。 通道包括外部区域和可操作以输送排气流和诸如尿素流的液体流的内部区域。 混合装置包括可操作以将混合装置保持在通道内的保持环。 第一多个翅片从保持环延伸并且可操作以将第一方向上的旋转速度分量赋予流路的外部区域中的排气流和尿素流。 第二多个翅片从保持环延伸并且可操作以将转速分量在与第一方向相反的第二方向上赋予通道内部区域中的排气流和尿素流。

公开(公告)号：US06922987B2

公开(公告)日：2005-08-02

申请号：US10364986

申请日：2003-02-12

申请人： Rahul Mital ,  Scott Cole ,  Robert C. Yu ,  Mike Nagel

发明人： Rahul Mital ,  Scott Cole ,  Robert C. Yu ,  Mike Nagel

IPC分类号： F01N3/08 ,  F01N3/20 ,  F01N3/36 ,  F01N3/00

CPC分类号： F01N3/0871 ,  F01N2610/03 ,  F01N2610/10 ,  Y02T10/20

摘要： The present invention provides for a system and process for enhancing internal combustion engine aftertreatment applications by superheated fuel injection. The system includes a fuel supply upstream of a fuel injector of an aftertreatment application. The system also includes a heater for heating the fuel in the fuel supply. A temperature controller can be used to maintain the heated fuel in a liquid form. When liquid fuel in the pressurized fuel supply is heated, then upon exiting the injector the pressure of the fuel drops rapidly, resulting in atomization of the liquid. The vaporized fuel thereby produced is comprised of extremely small droplets and is elevated in temperature, which reduces the possibility of condensation on internal surfaces of the aftertreatment system. This fine droplet size and resistance to condensation enhances the NOx conversion efficiency of adsorbers. Problems related to premature aging of catalysts and fuel penalties can also be reduced.

摘要翻译： 本发明提供一种用于通过过热燃料喷射来增强内燃机后处理应用的系统和方法。 该系统包括在后处理应用的燃料喷射器的上游的燃料供给。 该系统还包括用于加热燃料供应中的燃料的加热器。 可以使用温度控制器来保持加热的燃料为液体形式。 当加压燃料供应中的液体燃料被加热时，当离开喷射器时，燃料的压力迅速下降，导致液体的雾化。 由此产生的汽化燃料由非常小的液滴组成，并且温度升高，这降低了在后处理系统的内表面上冷凝的可能性。 这种细小的液滴尺寸和抗凝结性提高了吸附器的NOx转化效率。 与催化剂过早老化有关的问题和燃料处罚也可以减少。

公开(公告)号：US08555617B2

公开(公告)日：2013-10-15

申请号：US12411822

申请日：2009-03-26

申请人： Rahul Mital

发明人： Rahul Mital

IPC分类号： F01N3/00

CPC分类号： F01N3/2066 ,  F01N3/033 ,  F01N3/2033 ,  F01N13/009 ,  F01N13/011 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2570/10 ,  F01N2570/14 ,  F01N2610/02 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/26

摘要： The present invention is directed towards methods and systems for treatment of exhaust gas from an engine. In one embodiment, an exhaust gas treatment system for a diesel engine includes a four-way catalyst in fluid communication with a diesel engine to receive an exhaust gas flow therefrom, the four-way catalyst comprising a lean nitrogen oxides (NOX) trap and a diesel particulate filter (DPF). The system also includes a urea selective catalytic reduction (U-SCR) catalyst in fluid communication with the four-way catalyst to receive the exhaust gas flow therefrom.

摘要翻译： 本发明涉及用于处理来自发动机的废气的方法和系统。 在一个实施例中，用于柴油发动机的废气处理系统包括与柴油发动机流体连通以接收其中的废气流的四通催化剂，所述四元催化剂包括贫氮氧化物（NOX）阱和 柴油微粒过滤器（DPF）。 该系统还包括与四元催化剂流体连通的尿素选择性催化还原（U-SCR）催化剂以接收其中的废气流。

公开(公告)号：US20120204541A1

公开(公告)日：2012-08-16

申请号：US13026654

申请日：2011-02-14

申请人： Jianwen Li ,  Rahul Mital ,  Kimberly O'Kane ,  Shouxian Ren

发明人： Jianwen Li ,  Rahul Mital ,  Kimberly O'Kane ,  Shouxian Ren

IPC分类号： F01N3/18

CPC分类号： F01N3/2892 ,  B01D53/90 ,  B01D53/9454 ,  B01D2251/2062 ,  B01D2251/2067 ,  B01D2251/208 ,  B01F3/04049 ,  B01F5/0451 ,  B01F5/0614 ,  B01F5/0616 ,  B01F13/1027 ,  B01F2005/0636 ,  B01F2005/0639 ,  F01N2240/20 ,  F01N2610/1453 ,  Y02T10/22

摘要： According to one aspect of the invention, a mixer element to be placed between an internal combustion engine exhaust manifold and catalytic converter is provided. The mixer element includes a tubular conduit that receives an exhaust gas flow from the internal combustion engine, a first mixer configured to induce a first vortex of the exhaust gas flow in a first rotational direction and an injector disposed in the tubular conduit downstream of the first mixer, the injector being configured to inject a diesel emission fluid flow into the exhaust gas flow. The mixer element also includes a second mixer positioned downstream of the injector and a third mixer positioned downstream of the second mixer, the third mixer being configured to induce a second vortex of the exhaust gas flow and the diesel emission fluid mixture in a second rotational direction, opposite of the first rotational direction.

摘要翻译： 根据本发明的一个方面，提供了一种放置在内燃机排气歧管和催化转化器之间的混合器元件。 混合器元件包括管状导管，其接收来自内燃机的废气流;第一混合器，被配置为在第一旋转方向上引入废气流的第一涡流;以及喷射器，其位于第一 混合器，所述注射器被配置为将柴油排放流体流注入到废气流中。 所述混合器元件还包括位于所述喷射器下游的第二混合器和位于所述第二混合器下游的第三混合器，所述第三混合器被配置为在第二旋转方向上引入排气流的第二涡流和所述柴油发射流体混合物 与第一旋转方向相反。

公开(公告)号：US20100326059A1

公开(公告)日：2010-12-30

申请号：US12685016

申请日：2010-01-11

申请人： Rahul Mital ,  Jianwen Li

发明人： Rahul Mital ,  Jianwen Li

IPC分类号： F01N3/035 ,  F01N3/10 ,  B21D51/16

CPC分类号： F01N3/2066 ,  F01N3/0222 ,  F01N3/035 ,  F01N3/103 ,  F01N3/281 ,  F01N3/2828 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2610/02 ,  F01N2610/03 ,  Y02T10/24 ,  Y10T29/49345

摘要： In one exemplary embodiment of the present invention, an exhaust aftertreatment system is disclosed. The system includes an oxidation catalyst (OC) that is configured to receive an exhaust gas flow from an engine. The system also includes an uncoated particulate filter (PF) that is configured to receive the exhaust gas flow from the OC. The system further also includes an exhaust fluid (EF) dosing device configured for dosing of an EF into the exhaust gas flow upstream of the uncoated PF. Still further, the system includes a selective catalyst reduction (SCR) catalyst that is configured to receive the exhaust gas flow from the uncoated PF, wherein the OC, uncoated PF and SCR catalyst comprise an exhaust aftertreatment system. A urea injector may be provided as the EF dosing device and arranged to inject urea, for example, into the exhaust gases upstream of the uncoated PF.

摘要翻译： 在本发明的一个示例性实施例中，公开了排气后处理系统。 该系统包括被配置为接收来自发动机的废气流的氧化催化剂（OC）。 该系统还包括未涂覆的微粒过滤器（PF），其构造成接收来自OC的废气流。 该系统还包括配置用于将EF计量到未涂覆的PF上游的废气流中的排气流体（EF）计量装置。 此外，该系统包括选择性催化剂还原（SCR）催化剂，其被配置为接收来自未涂覆的PF的废气流，其中OC未未涂覆的PF和SCR催化剂包括排气后处理系统。 可以提供尿素注射器作为EF计量装置并且被布置成例如将尿素注入到未涂覆的PF的上游的废气中。

公开(公告)号：US20100242448A1

公开(公告)日：2010-09-30

申请号：US12411822

申请日：2009-03-26

申请人： Rahul Mital

发明人： Rahul Mital

IPC分类号： F01N9/00 ,  F01N3/035 ,  F01N11/00

CPC分类号： F01N3/2066 ,  F01N3/033 ,  F01N3/2033 ,  F01N13/009 ,  F01N13/011 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2570/10 ,  F01N2570/14 ,  F01N2610/02 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/26

摘要： The present invention is directed towards methods and systems for treatment of exhaust gas from an engine. In one embodiment, an exhaust gas treatment system for a diesel engine includes a four-way catalyst in fluid communication with a diesel engine to receive an exhaust gas flow therefrom, the four-way catalyst comprising a lean nitrogen oxides (NOX) trap and a diesel particulate filter (DPF). The system also includes a urea selective catalytic reduction (U-SCR) catalyst in fluid communication with the four-way catalyst to receive the exhaust gas flow therefrom.

摘要翻译： 本发明涉及用于处理来自发动机的废气的方法和系统。 在一个实施例中，用于柴油发动机的废气处理系统包括与柴油发动机流体连通以接收其中的废气流的四通催化剂，所述四元催化剂包括贫氮氧化物（NOX）阱和 柴油微粒过滤器（DPF）。 该系统还包括与四元催化剂流体连通的尿素选择性催化还原（U-SCR）催化剂以接收其中的废气流。