Method for estimating slippage of a selective catalyst reduction system
    51.
    发明授权
    Method for estimating slippage of a selective catalyst reduction system 有权
    用于估计选择性催化剂还原体系的滑移的方法

    公开(公告)号:US09080488B2

    公开(公告)日:2015-07-14

    申请号:US13071321

    申请日:2011-03-24

    IPC分类号: F01N3/20 F01N3/18

    摘要: A method for determining NH3 and NOx slippage through a SCR is described. In one example, signals from NOx sensors positioned upstream and downstream of a SCR are processed and provide indication of NH3 and NOx slippage. Engine emissions may be reduced with information provided via the NOx sensors, at least during some conditions.

    摘要翻译: 描述了通过SCR确定NH 3和NO x滑移的方法。 在一个示例中,处理位于SCR上游和下游的NOx传感器的信号被处理并提供NH3和NOx滑移的指示。 至少在某些情况下,通过NOx传感器提供的信息可以减少发动机排放。

    Emission control with a particulate matter sensor
    53.
    发明授权
    Emission control with a particulate matter sensor 有权
    用颗粒物传感器进行排放控制

    公开(公告)号:US08627645B2

    公开(公告)日:2014-01-14

    申请号:US13115713

    申请日:2011-05-25

    IPC分类号: F01N3/00 F01N3/02 G01N7/00

    CPC分类号: F01N3/021 G01N27/4067

    摘要: A method for controlling a particulate matter sensor heater is provided. The method includes operating the heater to burn-off soot accumulated on the sensor; and adjusting the heater level based on sensor output generated during the heater operation. In this way, improved heater control can be achieved using the sensor output already available.

    摘要翻译: 提供了一种用于控制颗粒物传感器加热器的方法。 该方法包括操作加热器来燃烧积聚在传感器上的烟灰; 并且基于在加热器操作期间产生的传感器输出来调节加热器电平。 以这种方式,可以使用已经可用的传感器输出来实现改进的加热器控制。