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    Premixing chamber for an exhaust gas purification system
    3.
    发明授权
    Premixing chamber for an exhaust gas purification system 失效
    用于废气净化系统的预混室

    公开(公告)号：US5943858A

    公开(公告)日：1999-08-31

    申请号：US974259

    申请日：1997-11-19

    Applicant: Lothar Hofmann ,  Oliver Pfaff ,  Udo Klumpp ,  Wieland Mathes

    Inventor： Lothar Hofmann ,  Oliver Pfaff ,  Udo Klumpp ,  Wieland Mathes

    IPC: B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N3/00 ,  B29C45/20 ,  A62C5/00

    CPC classification number: F01N3/2066 ,  B01D53/8631 ,  B01D53/9431 ,  F01N2610/02 ,  F01N2610/08 ,  Y02T10/24

    Abstract: A premixing chamber of a nebulizing device for an exhaust gas purification system serves to mix a compressed gas such as compressed air, for example, with a reducing agent such as urea solution, for example. The premixing chamber is set up on the carburetor principle and includes a compressed gas feed having a taper and a reducing agent feed opening in the region of the taper. The premixing chamber ensures that no deposits originating from the reducing agent can settle in the region of the mixing route. The premixing chamber is provided, in particular, for an exhaust gas purification system of a vehicle fitted with a regulated diesel catalytic converter as well as for stationary diesel engines of up to about 1000 kW (mechanical power).

    Abstract translation: 用于排气净化系统的雾化装置的预混合室用于例如将诸如压缩空气的压缩气体与例如尿素溶液等还原剂混合。 预混合室设置在化油器原理上，并且包括在锥形区域中具有锥形和还原剂进料口的压缩气体进料。 预混合室确保源自还原剂的沉积物不会沉淀在混合路线的区域。 特别地，预混合室用于装配有调节柴油催化转化器的车辆的排气净化系统以及高达约1000kW（机械功率）的固定式柴油发动机。

    Configuration for decomposing nitrogen oxides in a gas stream and method for using the configuration
    4.
    发明授权
    Configuration for decomposing nitrogen oxides in a gas stream and method for using the configuration 有权
    在气流中分解氮氧化物的配置和使用该配置的方法

    公开(公告)号：US06475453B1

    公开(公告)日：2002-11-05

    申请号：US09133004

    申请日：1998-08-12

    Applicant: Wieland Mathes ,  Lothar Hofmann ,  Frank Witzel

    Inventor： Wieland Mathes ,  Lothar Hofmann ,  Frank Witzel

    IPC: B01J2104

    CPC classification number: F01N3/2066 ,  B01D53/9431 ,  B01D53/9477 ,  B01J35/04 ,  F01N13/0097 ,  F01N2330/06 ,  F01N2610/02 ,  Y02T10/24

    Abstract: A configuration for decomposing nitrogen oxides in a gas stream includes a plurality of catalytic converters disposed one after the other through which the gas stream can flow. Each of the catalytic converters has a honeycomb structure with many parallel cells through which the gas stream can flow. Each of the catalytic converters also has a predetermined cell density and a predetermined average level of activity defined as a proportion by weight of the catalytically active agent. The predetermined cell density of a second catalytic converter through which the gas stream flows after a first catalytic converter is lower than the predetermined cell density of the first catalytic converter. The predetermined average level of activity of the second catalytic converter is also higher than the predetermined average level of activity of the first catalytic converter. The configuration is preferably used in conjunction with an exhaust gas from a combustion drive unit.

    Abstract translation: 用于分解气流中的氮氧化物的构造包括多个催化转化器，其一个接一个地设置，气流可以流过。 每个催化转化器具有蜂窝结构，其具有许多平行的气室，气流可以流过该蜂窝结构。 每个催化转化器还具有预定的细胞密度和预定的平均活性水平，定义为催化活性剂的重量比例。 气体流在第一催化转化器之后流过的第二催化转化器的预定电池密度低于第一催化转化器的预定电池密度。 第二催化转化器的预定平均活性水平也高于第一催化转化器的预定平均活性水平。 该结构优选与来自燃烧驱动单元的废气结合使用。

    Method and device for introducing liquid into an exhaust-gas purification system
    7.
    发明授权
    Method and device for introducing liquid into an exhaust-gas purification system 失效
    将液体引入废气净化系统的方法和装置

    公开(公告)号：US5884475A

    公开(公告)日：1999-03-23

    申请号：US816365

    申请日：1997-03-13

    Applicant: Lothar Hofmann ,  Ronald Neufert ,  Wieland Mathes

    Inventor： Lothar Hofmann ,  Ronald Neufert ,  Wieland Mathes

    IPC: F01N3/08 ,  B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N3/24 ,  F23J15/00 ,  F23J15/02 ,  F01N3/00

    CPC classification number: F01N3/2066 ,  B01D53/9431 ,  B01D53/9495 ,  F23J15/003 ,  F01N2240/02 ,  F01N2240/16 ,  F01N2610/02 ,  F01N2610/08 ,  F01N2610/10 ,  F01N2610/1406 ,  F01N2610/1486 ,  F01N2610/1493 ,  Y02T10/24

    Abstract: Nitrogen oxides emitted by an internal-combustion engine operated with excess air are normally converted by the method of selective catalytic reduction by bringing the nitrogen oxides, together with ammonia, into contact with a selective catalyst. Due to the dangers associated with the use of ammonia, in a motor vehicle ammonia should only be carried in the form of a substance which liberates ammonia, generally an aqueous urea solution. A method and a device for introducing liquid into an exhaust-gas purification system according to the invention avoids frost damage to sections of the system during shutdown times and permits operation of the system at temperatures below the freezing point of the reducing agent solution being used. The method and device include a (thermally insulated) reservoir for the reducing agent liquid and a liquid supply line which is connected thereto and terminates in an outlet opening for the liquid. The reservoir and the liquid supply line can be heated. Furthermore, a heater is provided for liquefying a starting volume which is small as compared with the volume of the reservoir. The liquid supply line may also have a back-flush valve to which a gas that is under pressure can be applied. The supply line can consequently be blown free.

    Abstract translation: 由过量空气运行的内燃机排放的氮氧化物通常通过使氮氧化物与氨与选择性催化剂接触而通过选择性催化还原的方法转化。 由于与使用氨有关的危险，在机动车辆中，氨只应以释放氨（通常为尿素水溶液）的物质的形式运载。 根据本发明的用于将液体引入排气净化系统的方法和装置避免了在关闭时间期间对系统的部分的霜冻损坏，并且允许系统在低于所使用的还原剂溶液的凝固点的温度下操作。 该方法和装置包括用于还原剂液体的（隔热）储存器和连接到其上的终止于液体出口的液体供应管线。 储存器和液体供应管线可以被加热。 此外，提供了一种用于液化与储存器的体积相比小的起始体积的加热器。 液体供应管线还可以具有可以施加压力下的气体的后冲洗阀。 因此，供应线可以自由吹制。

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