FAILURE DIAGNOSIS DEVICE OF EMISSION CONTROL SYSTEM
    65.
    发明申请
    FAILURE DIAGNOSIS DEVICE OF EMISSION CONTROL SYSTEM 有权
    排放控制系统故障诊断装置

    公开(公告)号:US20160265461A1

    公开(公告)日:2016-09-15

    申请号:US15064809

    申请日:2016-03-09

    Abstract: In a failure diagnosis device of an emission control system that utilizes an electrode-based PM sensor to diagnose a failure of a particulate filter, some embodiments may be to suppress reduction of accuracy of diagnosis of a failure due to in-cylinder rich control. The failure diagnosis device of the emission control system performs a measurement process. The measurement process includes a sensor recovery process of removing PM depositing between the electrodes of the electrode-based PM sensor, a process of starting application of the predetermined voltage to the electrodes of the PM sensor after completion of the sensor recovery process, and a process of obtaining an output value of the PM sensor after elapse of a predetermined time period since the start of application of the predetermined voltage to the electrodes of the PM sensor.

    Abstract translation: 在利用基于电极的PM传感器来诊断微粒过滤器的故障的排放控制系统的故障诊断装置中,一些实施例可以是抑制由于缸内控制而引起的故障诊断的准确性的降低。 排放控制系统的故障诊断装置进行测量处理。 该测量处理包括:在完成传感器恢复处理之后,除去基于电极的PM传感器的电极之间的PM沉积的传感器恢复处理,开始对PM传感器的电极施加预定电压的处理;以及处理 在从PM传感器的电极开始施加预定电压之后经过预定时间段之后获得PM传感器的输出值。

    Apparatus, system, and method for reducing NOx emissions on an SCR catalyst
    69.
    发明授权
    Apparatus, system, and method for reducing NOx emissions on an SCR catalyst 有权
    用于减少SCR催化剂上NOx排放的装置,系统和方法

    公开(公告)号:US08161730B2

    公开(公告)日:2012-04-24

    申请号:US12112795

    申请日:2008-04-30

    Abstract: Various embodiments of an apparatus, system, and method are disclosed for reducing NOx emissions on an SCR catalyst. For example, according to one representative embodiment, an apparatus for reducing NOx emissions in an engine exhaust includes a NOx reduction target module that is configured to determine a NOx reduction requirement that includes an amount of NOx in the exhaust gas stream to be reduced on a selective catalytic reduction (SCR) catalyst. The apparatus also includes an ammonia target module that is configured to determine an ammonia addition requirement that includes an amount of ammonia added to the exhaust gas stream to achieve the NOx reduction requirement. The apparatus also includes a reductant target module that is configured to determine a reductant injection requirement that includes an amount of reductant added to the exhaust gas stream to achieve the ammonia addition requirement. The apparatus further includes a reductant limiting module that is configured to determine whether at least one reductant limiting condition is met and to limit the amount of reductant added in response to the at least one reductant limiting condition if the at least one reductant limiting condition has been met.

    Abstract translation: 公开了用于减少SCR催化剂上的NOx排放的设备,系统和方法的各种实施例。 例如,根据一个代表性的实施例,用于减少发动机排气中的NOx排放的装置包括NOx还原目标模块,其被配置为确定NOx还原要求,所述NOx还原要求包括在所述排气流中减少的NOx的量 选择性催化还原(SCR)催化剂。 该装置还包括氨目标模块,其被配置为确定包括添加到废气流中的氨的量以实现NOx降低要求的氨添加要求。 该装置还包括还原剂目标模块,其被配置为确定还原剂注入要求,其包括添加到废气流中的还原剂的量以实现氨添加要求。 该装置还包括还原剂限制模块,其被配置为确定是否满足至少一个还原剂限制条件,并且如果至少一种还原剂限制条件已经被限制,则限制响应于至少一种还原剂限制条件而添加的还原剂的量 见面

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