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    METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE TO HEAT UP A SELECTIVE CATALYST REDUCER
    8.
    发明申请
    METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE TO HEAT UP A SELECTIVE CATALYST REDUCER 有权
    内燃机的操作方法加热选择性催化还原剂

    公开(公告)号：US20090217645A1

    公开(公告)日：2009-09-03

    申请号：US12040038

    申请日：2008-02-29

    申请人： Kevin D. Sisken ,  Matthew T. Baird

    发明人： Kevin D. Sisken ,  Matthew T. Baird

    IPC分类号： F01N9/00

    CPC分类号： F01N9/00 ,  F01N3/035 ,  F01N3/208 ,  F01N2250/02 ,  F01N2560/06 ,  Y02T10/24 ,  Y02T10/47

    摘要： In one embodiment, the present invention relates to a method to operate an internal combustion engine equipped with an Electronic Control Unit (ECU) with memory, an exhaust system including a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter (DPF), upstream of a Selective Catalyst Reducer (SCR). A doser is in the DPF and actuated by commands from the ECU. The method includes sensors at the DPF and SCR electronically connected to the ECU to transmit data signals indicative of operating conditions at the DPF and SCR. The method includes sensing the temperature at an outlet of the DPF and an inlet at the SCR determining whether that temperature is at least a predetermined temperature for a predetermined period of time, and introducing heat to the SCR to raise its temperature to a predetermined level for a predetermined period of time, such as light off temperature, to operate more efficiently. Heat may be introduced in the exhaust stream by engine thermal management strategies as well.

    摘要翻译： 在一个实施例中，本发明涉及一种操作装备有具有存储器的电子控制单元（ECU）的内燃机，包括柴油氧化催化剂（DOC），柴油微粒过滤器（DPF），上游 的选择性催化剂还原剂（SCR）。 加料器位于DPF中，由ECU的命令启动。 该方法包括在DPF和SCR处的电子连接到ECU的传感器，以传送指示在DPF和SCR处的操作条件的数据信号。 该方法包括检测DPF出口处的温度和SCR处的入口，确定该温度是否至少为预定温度达预定时间段，并且向SCR引入热量以将其温度升高至预定水平 预定的时间段，例如熄灭温度，以更有效地操作。 也可以通过发动机热管理策略在排气流中引入热量。