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    Premixing chamber for an exhaust gas purification system
    2.
    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
    6.
    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。

    Metering system
    8.
    发明授权
    Metering system 有权
    计量系统

    公开(公告)号：US06539708B1

    公开(公告)日：2003-04-01

    申请号：US09640152

    申请日：2000-08-16

    Applicant: Lothar Hofmann ,  Wieland Mathes

    Inventor： Lothar Hofmann ,  Wieland Mathes

    IPC: F01N300

    CPC classification number: F01N3/2066 ,  B01D53/8631 ,  B01D53/8696 ,  B01D53/90 ,  B01D53/9431 ,  B01D53/9495 ,  B01F5/0268 ,  F01N2240/20 ,  F01N2260/024 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2610/102 ,  F01N2610/11 ,  F01N2610/1453 ,  F01N2610/1473 ,  F23J15/003 ,  Y02T10/24

    Abstract: A metering system in a combustion unit having an exhaust-gas chamber and a reducing agent reservoir includes an electrically controllable valve for introducing the reducing agent into the exhaust-gas chamber without using compressed air. The valve has an outlet opening that opens directly into the exhaust-gas chamber. The outlet opening is fluidically connected to the reservoir through the valve. The metering system can be produced with only little technical outlay. The metering system includes a recirculating circuit, and the valve has a holding chamber for the reducing agent. The holding chamber is disposed downstream of the outlet opening in a reducing agent flow direction, and is fluidically connected into the recirculating circuit. The metering system includes a coolant circuit for cooling the valve. The valve and its outlet opening is disposed in the exhaust-gas chamber to position the principal axis of the valve at an angle of less than 90° with respect to a principal direction of flow of exhaust gas in the exhaust-gas chamber. The metering system includes a baffle disposed in the exhaust-gas chamber to cause a change in direction of reducing agent introduced therein. The combustion unit can be a diesel engine, and the reducing agent can be a urea solution.

    Abstract translation: 在具有废气室和还原剂储存器的燃烧单元中的计量系统包括用于将还原剂引入排气室而不使用压缩空气的电可控阀。 该阀具有直接进入废气室的出口。 出口开口通过阀流体连接到储存器。 计量系统只能用很少的技术支出生产。 计量系统包括循环回路，并且该阀具有用于还原剂的保持室。 保持室以还原剂流动方向设置在出口开口的下游，并且流体连接到再循环回路中。 计量系统包括用于冷却阀的冷却剂回路。 阀及其出口开口设置在废气室中，以相对于废气室中废气流动的主要方向将阀的主轴定位成小于90°的角度。 计量系统包括设置在废气室中的挡板，以引起其中引入的还原剂的方向改变。 燃烧单元可以是柴油发动机，还原剂可以是尿素溶液。

    Device for introducing a liquid reducing agent into an exhaust gas purification system
    9.
    发明授权
    Device for introducing a liquid reducing agent into an exhaust gas purification system 有权
    将液体还原剂引入废气净化系统的装置

    公开(公告)号：US06273120B1

    公开(公告)日：2001-08-14

    申请号：US09569285

    申请日：2000-05-12

    Applicant: Lothar Hofmann ,  Wieland Mathes

    Inventor： Lothar Hofmann ,  Wieland Mathes

    IPC: G05D1113

    CPC classification number: F01N3/2066 ,  B01D53/8631 ,  B01D53/8696 ,  B01D53/9431 ,  B01D53/9495 ,  F01N2610/02 ,  F01N2610/08 ,  F01N2610/1473 ,  Y02C20/10 ,  Y02T10/24 ,  Y10T137/2514

    Abstract: A device for introducing a liquid reducing agent into an exhaust gas purification system includes a gas line for receiving and carrying a gas, a reducing agent line for receiving and carrying a liquid reducing agent, a mixing chamber for mixing the reducing agent with the gas, the mixing chamber fluidically connected to the gas line and to the aid reducing agent line, a metering valve disposed in the reducing agent line; and a control device for controlling a pressure in the reducing agent line dependent upon a gas pressure in the gas line. The control device can also be used for controlling the reducing agent throughput in the reducing agent line in dependence on the gas pressure in the gas line.

    Abstract translation: 将液体还原剂引入废气净化系统中的装置包括用于接收和携带气体的气体管线，用于接收和运送液体还原剂的还原剂管线，用于将还原剂与气体混合的混合室， 所述混合室流体连接到所述气体管线和所述辅助还原剂管线，设置在所述还原剂管线中的计量阀; 以及用于根据气体管线中的气体压力来控制还原剂管线中的压力的​​控制装置。 控制装置还可以用于根据气体管线中的气体压力来控制还原剂管线中的还原剂生产量。

    Method for the catalytic conversion of nitrogen oxides present in the exhaust gas of an internal-combustion engine
    10.
    发明授权
    Method for the catalytic conversion of nitrogen oxides present in the exhaust gas of an internal-combustion engine 失效
    内燃机废气中存在的氮氧化物的催化转化方法

    公开(公告)号：US5785937A

    公开(公告)日：1998-07-28

    申请号：US798517

    申请日：1997-02-10

    Applicant: Ronald Neufert ,  Wieland Mathes ,  Dagmar Schobert-Schaefer ,  Lothar Hofmann

    Inventor： Ronald Neufert ,  Wieland Mathes ,  Dagmar Schobert-Schaefer ,  Lothar Hofmann

    IPC: B01D53/30 ,  B01D53/86 ,  B01D53/94 ,  F01N3/20

    CPC classification number: F01N3/208 ,  B01D53/30 ,  B01D53/8696 ,  B01D53/9431 ,  B01D53/9495 ,  F01N2560/06 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2610/146 ,  F01N2900/08 ,  F01N2900/1402 ,  F01N2900/1622 ,  Y02T10/24

    Abstract: A method is provided in which the reducing agent, during the starting phase of the internal-combustion engine and during operation with decreasing and, if appropriate, virtually constant exhaust gas temperature, is fed superstoichiometrically in relation to the nitrogen oxide concentration, while taking into account the temperature-dependent storage capacity of a denitration catalytic converter for the reducing agent. The reducing agent is otherwise fed substoichiometrically. In this manner, the catalytic converter is kept at all times at a preferred charge level, so that on one hand it is possible to provide sufficient stored reducing agent for the catalytic conversion and on the other hand it is possible to still have a reducing agent buffer available which avoids slip of the reducing agent. The invention can be used in all internal-combustion engines operated with air excess, such as diesel engines and lean-burn engines.

    Abstract translation: 提供了一种方法，其中在内燃机的起动阶段和在运行期间还原剂在减少并且如果适当的情况下基本上恒定的排气温度被加入到超氧化物计量相对于氮氧化物浓度的同时， 考虑了用于还原剂的脱硝催化转化器的温度依赖性储存容量。 还原剂另外以化学计量方式进料。 以这种方式，催化转化器始终保持在优选的装料水平，因此一方面可以提供足够的储存的用于催化转化的还原剂，另一方面可以还有还原剂 缓冲剂可以避免还原剂的滑脱。 本发明可以用于所有使用空气过剩的内燃机，例如柴油发动机和稀燃燃烧发动机。

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