Emission control system for vehicles powered by diesel engines
    8.
    发明授权
    Emission control system for vehicles powered by diesel engines 失效
    柴油发动机车辆排放控制系统

    公开(公告)号:US07055311B2

    公开(公告)日:2006-06-06

    申请号:US10232648

    申请日:2002-08-31

    IPC分类号: F01N3/00

    摘要: An NOx emission system for diesel powered vehicles has a “Y” exhaust system with an NOx adsorber catalyst in each leg and an oxidation catalyst in the combined leg. One bank of cylinders sends exhaust gases to one of the “Y” legs while a second bank of cylinders send exhaust gases to the other “Y” leg. Composition of the exhaust gases in each leg is independently controlled by the engine's ECU so that exhaust gases in one leg are rich for regenerating the NOx adsorber catalyst in that leg while exhaust gas composition in the other leg is lean so that the combined gas stream is always lean and reductant slip is oxidized in the oxidation catalyst.

    摘要翻译: 用于柴油动力车辆的NOx排放系统具有在每个支路中具有NOx吸附剂催化剂的“Y”排气系统和组合腿部中的氧化催化剂。 一排气缸向“Y”脚之一发送废气,而第二组气缸将废气发送到另一“Y”段。 每个支腿中的废气的组成由发动机的ECU独立地控制,使得一条腿中的排气富集,用于在该腿中再生NOx吸附剂催化剂,而另一条腿中的废气组成是稀的,使得组合的气流为 在氧化催化剂中总是贫和还原剂滑移被氧化。