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    Process and apparatus for reducing nitrogen oxides in engine emissions
    1.
    发明授权
    Process and apparatus for reducing nitrogen oxides in engine emissions 失效
    减少发动机排放中氮氧化物的方法和装置

    公开(公告)号：US5921076A

    公开(公告)日：1999-07-13

    申请号：US781040

    申请日：1997-01-09

    申请人： Bernd Krutzsch ,  Christian Goerigk ,  Stefan Kurze ,  Gunter Wenninger ,  Walter Boegner ,  Friedrich Wirbeleit

    发明人： Bernd Krutzsch ,  Christian Goerigk ,  Stefan Kurze ,  Gunter Wenninger ,  Walter Boegner ,  Friedrich Wirbeleit

    IPC分类号： B01D53/94 ,  F01N3/08 ,  F01N3/20 ,  F01N13/02 ,  F02B1/04 ,  F01N3/00

    CPC分类号： F01N3/0814 ,  B01D53/9409 ,  B01D53/9495 ,  F01N13/009 ,  F01N3/2066 ,  F01N2240/30 ,  F01N2610/03 ,  F01N2610/04 ,  F02B1/04 ,  Y02T10/24

    摘要： A process and apparatus for reducing the nitrogen oxide content in oxygen-containing emissions is provided, particularly for internal-combustion engines, particularly of diesel engines and directly injecting Otto engines for motor vehicles. The nitrogen oxides contained in the exhaust gas are reduced by a suitable reducing agent, such as hydrogen or hydrocarbons, on a DENOX catalyst. For achieving an improved conversion rate for the nitrogen oxides, a combination of hydrogen and hydrocarbons are used as reducing agents. In different operating ranges of the internal-combustion engine only hydrogen, only hydrocarbons, or hydrogen and hydrocarbons are added. Preferably, for this purpose, the quantity of supplied hydrogen or hydrocarbons is reduced or increased with an increasing engine load and/or catalyst temperature and/or rotational engine speed.

    摘要翻译： 提供了用于降低含氧排放物中的氮氧化物含量的方法和装置，特别是用于内燃机，特别是柴油发动机的内燃机，并直接注入用于机动车辆的奥托发动机。 废气中所含的氮氧化物通过合适的还原剂如氢或烃在DENOX催化剂上被还原。 为了实现氮氧化物的改进转化率，使用氢和烃的组合作为还原剂。 在内燃机的不同工作范围内，只有氢气，仅添加烃或氢气和烃。 优选地，为此目的，随着发动机负荷和/或催化剂温度和/或转速发动机转速的增加，所供应的氢气或碳氢化合物的量减少或增加。

    Fuel injection system for an internal combustion engine
    9.
    发明授权
    Fuel injection system for an internal combustion engine 失效
    内燃机燃油喷射系统

    公开(公告)号：US5601067A

    公开(公告)日：1997-02-11

    申请号：US495185

    申请日：1995-06-27

    申请人： Friedrich Wirbeleit ,  Wolfgang Lehner ,  Alois Raab

    发明人： Friedrich Wirbeleit ,  Wolfgang Lehner ,  Alois Raab

    IPC分类号： F02M43/00 ,  F02M43/04 ,  F02M57/02 ,  F02B13/00 ,  F02B3/00

    CPC分类号： F02M43/00 ,  F02M43/04 ,  F02M57/02 ,  F02M57/025

    摘要： In a fuel injection system for injecting fuel into a combustion chamber of an internal combustion engine by means of a dual fluid injector which includes a nozzle with a nozzle needle normally closing the nozzle and which has formed around the nozzle needle an annular space which is in communication with a fluid source and a pressure chamber in communication with the annular space and the working space of a plunger disposed in the injector so as to be movable between upper and lower end positions but being biased to its upper end position, the plunger working space is in communication with a fuel source via a fuel supply line which includes a control valve and an electromagnetically controlled valve is provided for controlling the admission of a hydraulic operating fluid to the plunger for moving the plunger into the working space for the ejection of the fuel and the fluid from the pressure chamber and the annular space around the nozzle and the fuel supply line includes an electronically controllable valve adapted to close the fuel supply line for a controllable period of time while the plunger is returned to its upper end position to thereby create a vacuum in the working space for drawing an amount of the fluid into the annular space around the nozzle which depends on the time for which the fuel supply line is closed by the control valve.

    摘要翻译： 在用于通过双流体注射器将燃料喷射到内燃机的燃烧室中的燃料喷射系统中，所述双流体喷射器包括具有喷嘴针的喷嘴，所述喷嘴针通常关闭喷嘴并且在喷嘴针周围形成环形空间 与流体源和压力室连通，其与环形空间和设置在喷射器中的柱塞的工作空间连通，以便能够在上端位置和下端位置之间移动，但是被偏压到其上端位置，柱塞工作空间 通过包括控制阀的燃料供应管线与燃料源连通，并且设置有电磁控制阀，用于控制液压工作流体进入柱塞以将柱塞移动到用于喷射燃料的工作空间 并且来自压力室的流体和围绕喷嘴和燃料供应管线的环形空间包括电子 适用于在柱塞返回到其上端位置期间将燃料供应管线关闭可控制的时间段，从而在工作空间中产生真空，用于将一定量的流体吸入喷嘴周围的环形空间 取决于燃料供应管路由控制阀关闭的时间。