Method of prediction of NOx mass flow in exhaust
    91.
    发明授权
    Method of prediction of NOx mass flow in exhaust 失效
    排气中NOx质量流量预测方法

    公开(公告)号:US07155331B1

    公开(公告)日:2006-12-26

    申请号:US11012075

    申请日:2004-12-14

    IPC分类号: F01N3/00 G06F17/00

    摘要: Methods for estimating the mass flow rate of NOx in an exhaust stream by correlating the level of NOx to an engine parameter. The level of NOx can be estimated as a function of engine power, of intake pressure, of exhaust temperature, as a function of the percentage of O2 in the exhaust stream, or as a combination of any of these. Once the level of NOx is approximately known, the exhaust system of the engine system can be modified to improve the removal efficiency of NOx and exhaust particulate matter from the exhaust stream. These methods for estimating the NOx mass flow rate can be used for an exhaust configuration that includes a lean NOx catalyst (LNC), a selective catalytic reduction (SCR) catalyst, or a lean NOx trap (LNT). A particulate filter can be present in the exhaust configuration.

    摘要翻译: 通过将NOx水平与发动机参数相关联来估计排气流中的NOx的质量流量的方法。 作为排气流中的O 2%的百分比的函数,可以将NOx的水平作为发动机功率,进气压力,排气温度的函数来估计,或作为任何 这些。 一旦NOx的水平大致已知,则可以修改发动机系统的排气系统,以提高NOx的排出效率和从排气流排出颗粒物质。 用于估计NOx质量流量的这些方法可以用于包括贫NOx催化剂(LNC),选择性催化还原(SCR)催化剂或稀NOx捕集器(LNT)的排气构造。 排气构造中可以存在微粒过滤器。