METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE TO HEAT UP A SELECTIVE CATALYST REDUCER
    4.
    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

    IPC分类号: F01N9/00

    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。

    Cold start white smoke aftertreatment protection
    9.
    发明申请
    Cold start white smoke aftertreatment protection 有权
    冷启动白烟后处理保护

    公开(公告)号:US20080307771A1

    公开(公告)日:2008-12-18

    申请号:US11818817

    申请日:2007-06-15

    IPC分类号: F01N3/00

    摘要: A method for cold start white smoke protection of a hydrocarbon after treatment device, and method of engine operation to effect the same. The method comprises a) determining the temperature of the hydrocarbon after-treatment device during cold start conditions; b) determining hydrocarbon emissions in the hydrocarbon after-treatment device; and c) modifying engine operating conditions to raise the hydrocarbon after-treatment temperature at a pre-determined rate to a temperature sufficient to permit controlled oxidation of the hydrocarbons in the hydrocarbon after treatment device.

    摘要翻译: 一种冷启动白烟保护方法,用于处理装置后的碳氢化合物,以及发动机操作方法相同。 该方法包括:a)在冷启动条件下确定烃后处理装置的温度; b)确定烃后处理装置中的碳氢化合物排放量; 以及c)改变发动机工作条件以将烃后处理温度以预定速率升高到足以允许烃在处理后装置中受控氧化的温度。