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    Method and apparatus for controlling an internal combustion engine coupled to a passive selective catalytic reduction aftertreatment system
    4.
    发明授权
    Method and apparatus for controlling an internal combustion engine coupled to a passive selective catalytic reduction aftertreatment system 有权
    用于控制与被动选择性催化还原后处理系统耦合的内燃机的方法和装置

    公开(公告)号：US08616182B2

    公开(公告)日：2013-12-31

    申请号：US13098606

    申请日：2011-05-02

    申请人： Nicole Wermuth ,  Paul M. Najt ,  Kushal Narayanaswamy ,  Hanho Yun

    发明人： Nicole Wermuth ,  Paul M. Najt ,  Kushal Narayanaswamy ,  Hanho Yun

    IPC分类号： F02D41/14

    CPC分类号： F02D41/3035 ,  F01N3/101 ,  F01N3/2073 ,  F01N9/00 ,  F01N13/009 ,  F02D35/023 ,  F02D41/3064 ,  Y02T10/128 ,  Y02T10/22 ,  Y02T10/47

    摘要： A direct-injection internal combustion engine is fluidly coupled to a passive SCR system including a three-way catalytic converter upstream to an ammonia-selective catalytic reduction catalyst. Transition from an HCCI combustion mode to an SI combustion mode includes determining a preferred air/fuel ratio to achieve a minimum fuel consumption and maintain combustion stability at an acceptable level for a predetermined engine operating point during the SI combustion mode. A fuel injection timing, an engine spark timing and an engine valve lift are substantially immediately controlled from respective HCCI combustion mode settings to respective SI combustion mode settings. A transition to the preferred air/fuel ratio is coordinated with a transition of an engine valve phase from a respective HCCI combustion mode setting to a respective SI combustion mode phase setting.

    摘要翻译： 直喷式内燃机与包括在氨选择性催化还原催化剂上游的三元催化转化器的无源SCR系统流体耦合。 从HCCI燃烧模式到SI燃烧模式的过渡包括确定优选的空气/燃料比以实现最小燃料消耗，并且在SI燃烧模式期间将燃烧稳定性保持在预定发动机工作点的可接受水平。 燃料喷射正时，发动机火花正时和发动机气门升程基本上立即从相应的HCCI燃烧模式设置控制到相应的SI燃烧模式设置。 与优选的空气/燃料比的转换与发动机气门相从相应的HCCI燃烧模式设定转换到各自的SI燃烧模式相位设定协调。

    TECHNIQUE TO DIAGNOSE AND CONTROL AMMONIA GENERATION FROM A TWC FOR PASSIVE AMMONIA SCR OPERATION
    5.
    发明申请
    TECHNIQUE TO DIAGNOSE AND CONTROL AMMONIA GENERATION FROM A TWC FOR PASSIVE AMMONIA SCR OPERATION 审中-公开
    技术诊断和控制氨基酸生成从一个TWC被动的氨氮SCR操作

    公开(公告)号：US20130340408A1

    公开(公告)日：2013-12-26

    申请号：US13533069

    申请日：2012-06-26

    申请人： Kushal Narayanaswamy ,  Joel G. Toner ,  Paul M. Najt ,  Gerald A. Szekely, JR.

    发明人： Kushal Narayanaswamy ,  Joel G. Toner ,  Paul M. Najt ,  Gerald A. Szekely, JR.

    IPC分类号： F01N3/10

    CPC分类号： F01N9/00 ,  F01N3/101 ,  F01N3/106 ,  F01N3/2073 ,  F01N13/009 ,  F01N2430/06 ,  F01N2560/025 ,  F01N2610/02 ,  F01N2900/1402 ,  F02B2075/125 ,  F02D41/1441 ,  F02D41/1454 ,  Y02T10/22 ,  Y02T10/47

    摘要： A method for controlling ammonia generation in an exhaust gas feedstream output from an internal combustion engine equipped with an exhaust aftertreatment system having a first aftertreatment device includes executing an ammonia generation cycle to generate ammonia on the first aftertreatment device. The ammonia generation cycle includes monitoring an air-fuel ratio in the exhaust gas feedstream at a first location in the exhaust aftertreatment system, and monitoring an air-fuel ratio in the exhaust gas feedstream at a second location in the exhaust aftertreatment system. The air-fuel ratio at the first location is compared to the air-fuel ratio at the second location. If the air-fuel ratio at the second location is richer than the air-fuel ratio at the first location, operation of the engine is adjusted until the air-fuel ratio at the second location is equal to the air-fuel ratio at the first location.

    摘要翻译： 一种用于控制从配备有具有第一后处理装置的排气后处理系统的内燃机输出的废气原料流中的氨生成方法，包括在第一后处理装置上执行产生氨的氨生成循环。 氨生成循环包括在排气后处理系统的第一位置监视废气进料流中的空燃比，并且在排气后处理系统的第二位置监测废气进料流中的空燃比。 将第一位置处的空燃比与第二位置处的空燃比进行比较。 如果第二位置的空燃比比第一位置的空燃比更浓，则调整发动机的运转直到第二位置的空燃比等于第一位置的空燃比 位置。