Ammonia Slip Reduction
    2.
    发明申请
    Ammonia Slip Reduction 审中-公开
    氨减滑

    公开(公告)号:US20140127098A1

    公开(公告)日:2014-05-08

    申请号:US14070662

    申请日:2013-11-04

    IPC分类号: F01N3/20 B01D53/94

    摘要: A method for controlling injection of a reductant into an exhaust system of an internal combustion engine, which includes measuring temperature at a plurality of locations in the exhaust system relative to an SCR catalyst, determining an average temperature as a function of the measured temperatures, and controlling injecting of a reductant into the exhaust upstream of the catalyst as a function of the average temperature. The average temperature may be a weighted average where temperature measurements from at least some locations upstream of the SCR catalyst may be assigned greater weight than temperature measurements proximate the SCR catalyst.

    摘要翻译: 一种用于控制将还原剂注入到内燃机的排气系统中的方法,其包括相对于SCR催化剂测量排气系统中的多个位置处的温度,确定作为测量温度的函数的平均温度,以及 根据平均温度控制将还原剂注入催化剂上游的排气中。 平均温度可以是加权平均值,其中来自SCR催化剂上游的至少一些位置处的温度测量可以被分配比接近SCR催化剂的温度测量更大的权重。

    AMMONIA STORAGE ON AN SCR CATALYST
    6.
    发明申请
    AMMONIA STORAGE ON AN SCR CATALYST 有权
    氨氮储存在SCR催化剂上

    公开(公告)号:US20140182273A1

    公开(公告)日:2014-07-03

    申请号:US14071000

    申请日:2013-11-04

    IPC分类号: F02D41/14 F01N9/00 B01D53/94

    摘要: A system and method for calculating quantity of ammonia stored on an SCR catalyst at various times during an interval of time by processing certain data, including the aggregate quantity of ammonia introduced into an exhaust flow during the interval of time, calculating the efficiency of catalytic conversion of NOx to N2 and H2O by ammonia at each of the various times by processing certain data, including NOx measurements obtained from upstream and downstream NOx sensors, and establishing a correlation between efficiency of catalytic conversion of NOx to N2 and H2O by ammonia and quantity of ammonia stored on the SCR catalyst over the interval of time which comprises calculated efficiency of catalytic conversion of NOx and calculated quantity of ammonia stored on the SCR catalyst at each of the various times.

    摘要翻译: 一种用于通过处理某些数据(包括在时间间隔内引入排气流中的氨的总量)来计算在时间间隔内的不同时间在SCR催化剂上存储的氨的量的系统和方法,计算催化转化效率 通过处理某些数据,包括从上游和下游NOx传感器获得的NOx测量,以及建立氨与氨与N 2和H 2 O的催化转化效率之间的相关性,以及各种数量的氮 在SCR催化剂上存储的氨在一段时间内,其中包括计算的NOx催化转化效率和储存在SCR催化剂上的氨的计算量。

    Ammonia storage on an SCR catalyst
    9.
    发明授权
    Ammonia storage on an SCR catalyst 有权
    氨储存在SCR催化剂上

    公开(公告)号:US08935915B2

    公开(公告)日:2015-01-20

    申请号:US14071000

    申请日:2013-11-04

    摘要: A system and method for calculating quantity of ammonia stored on an SCR catalyst at various times during an interval of time by processing certain data, including the aggregate quantity of ammonia introduced into an exhaust flow during the interval of time, calculating the efficiency of catalytic conversion of NOx to N2 and H2O by ammonia at each of the various times by processing certain data, including NOx measurements obtained from upstream and downstream NOx sensors, and establishing a correlation between efficiency of catalytic conversion of NOx to N2 and H2O by ammonia and quantity of ammonia stored on the SCR catalyst over the interval of time which comprises calculated efficiency of catalytic conversion of NOx and calculated quantity of ammonia stored on the SCR catalyst at each of the various times.

    摘要翻译: 一种用于通过处理某些数据(包括在时间间隔内引入排气流中的氨的总量)来计算在时间间隔内的不同时间在SCR催化剂上存储的氨的量的系统和方法,计算催化转化效率 通过处理某些数据,包括从上游和下游NOx传感器获得的NOx测量,以及建立氨与氨与N 2和H 2 O的催化转化效率之间的相关性,以及各种数量的氮 在SCR催化剂上存储的氨在一段时间内,其中包括计算的NOx催化转化效率和储存在SCR催化剂上的氨的计算量。

    DEF QUALITY SENSOR INTEGRATED INTO A DEF TANK WITH REPLACEABLE CONTROL CIRCUITRY

    公开(公告)号:US20240264134A1

    公开(公告)日:2024-08-08

    申请号:US18105965

    申请日:2023-02-06

    IPC分类号: G01N33/00

    CPC分类号: G01N33/00

    摘要: A DEF quality sensor integrated into a DEF tank with removable control circuitry preferably includes a housing and control circuitry. The housing preferably includes a base housing portion and a detachable cover. A sensor opening is formed through a bottom of the DEF tank to receive an outside perimeter of the base housing portion. The base housing portion is sealed to the DEF tank with any suitable sealant. Most of the base housing portion is located inside the DEF tank. The detachable cover is located outside the DEF tank. The detachable cover includes the control circuitry. The detachable cover may be secured to a bottom of the base housing portion with any suitable attachment device or method. The improved removable DEF quality sensor includes the benefits of decreased replacement part storage capacity for parts supplies as well as improved ease of serviceability for repair.