利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

20 条记录 (耗时 0.032 秒)

    Process and system for purifying exhaust gases of an internal-combustion engine
    6.
    发明授权
    Process and system for purifying exhaust gases of an internal-combustion engine 失效
    内燃机废气净化工艺及系统

    公开(公告)号：US06318073B1

    公开(公告)日：2001-11-20

    申请号：US09590009

    申请日：2000-06-09

    申请人： Walter Boegner ,  Guenter Karl ,  Bernd Krutzsch ,  Christof Schoen ,  Dirk Voigtlaender ,  Guenter Wenninger

    发明人： Walter Boegner ,  Guenter Karl ,  Bernd Krutzsch ,  Christof Schoen ,  Dirk Voigtlaender ,  Guenter Wenninger

    IPC分类号： F01N300

    CPC分类号： F01N3/085 ,  F01N3/0842 ,  F01N3/0878 ,  F01N3/0885 ,  F01N3/22 ,  F02B1/04

    摘要： An internal-combustion engine includes an engine control system that permits a change-over between a lean operation and a rich operation of the internal-combustion engine, and an exhaust gas purification system. A &lgr;-probe, an SOx storage catalyst and an NOx storage catalyst are successively arranged in an exhaust gas line behind the engine. At the start of desulfurization of the SOx storage catalyst, a change-over takes place from the lean to the rich operation of the engine. Secondary air is fed into the exhaust gas line; a predetermined &lgr; value of the exhaust gases mixed with secondary air and a temperature in the SOx storage catalyst are measured. At the end of the desulfurization, a change-over takes place from the rich to a lean operation of the engine.

    摘要翻译： 内燃机包括允许内燃机的精馏操作和丰富运转之间的转换的发动机控制系统和排气净化系统。 在发动机后面的排气管线中依次配置有羔羊探针，SOx储存催化剂和NOx储存催化剂。 在SOx储存催化剂的脱硫开始时，从发动机的稀薄运行到富油运转发生转换。 二次空气进入废气管路; 测量与二次空气混合的废气的预定amb值和SO x吸留催化剂中的温度。 在脱硫结束时，从发动机的丰富运行到精益运转都会发生转换。

    Process and apparatus for reducing nitrogen oxides in engine emissions
    8.
    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。