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    Method for monitoring combustion stability of an internal combustion engine
    1.
    发明公开
    Method for monitoring combustion stability of an internal combustion engine 有权
    Verfahren zurÜberwachungderVerbrennungsstabilitätvon Brennkraftmaschinen

    公开(公告)号：EP1914411A1

    公开(公告)日：2008-04-23

    申请号：EP08100260.2

    申请日：2005-07-14

    申请人： Ford Global Technologies, LLC

    发明人： Moraal, Paul Eduard ,  Vantine, Katie ,  Chevalier, Alain ,  Christen, Urs

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1497 ,  F02D35/023 ,  F02D41/1498 ,  F02D2200/1012 ,  Y02T10/128

    摘要： The present invention relates to a method for monitoring combustion stability of an internal combustion engine equipped with a crankshaft, an intake manifold and at least one cylinder.
    It is the object of the present invention to provide a method of the above mentioned kind which overcomes the problems known from the state of the art, in particular a method which is suitable for online calculation.
    With respect to the object a method is provided comprising the following steps:
    ■ determining the absolute deviation e of indicated mean effective pressure p ind or indicated torque T ind with respect to their actual set point, i.e., with respect to actual indicated mean effective pressure set point p ind,setpt or actual indicated torque set point T ind, setpt , namely Δp ind or ΔT ind , or alternatively determining the relative change Δ e in said deviation between two consecutive combustion cycles k, k+1 of said at least one cylinder, i.e., determining (Δp ind,k+1 - Δp ind,k ) or (ΔT ind,k+1 - ΔT ind,k ) or determining the relative change Δe in angular acceleration ω' of the crankshaft between two consecutive combustion cycles k, k+1, i.e., (Δω' k + 1 - Δω' k ), and
    ■ comparing said determinated deviation e or said change Δ e with a predetermined engine operating point dependent threshold e threshold or Δe threshold in order to decide if the combustion is stable or not by means of the following inequalities: e > e threshold or Δe > Δe threshold means combustion is not stable , e ≤ e threshold or Δe ≤ Δe threshold means combustion is stable .
    The method is preferably applied to homogeneous charge combustion ignition engines (HCCI).

    摘要翻译： 本发明涉及一种用于监测配备有曲轴，进气歧管和至少一个气缸的内燃机的燃烧稳定性的方法。 本发明的目的是提供一种克服现有技术中已知的问题，特别是适用于在线计算的方法的上述类型的方法。 关于该目的，提供了一种方法，其包括以下步骤： - 确定所指示的平均有效压力p ind或指示转矩T ind相对于其实际设定点的绝对偏差e，即相对于实际指示的平均有效压力 设定点p ind，设定值或实际指示转矩设定点T ind，setpt，即“p ind”或“T ind”，或者替代地确定所述at的两个连续燃烧循环k，k + 1之间的所述偏差中的相对变化e 至少一个气缸，即确定（“p ind，k + 1”，p ind，k）或（“T ind，k + 1 - ”T ind，k）或确定角加速度É' 在两个连续的燃烧循环k，k + 1之间，即（“É”k + 1-é'k）的曲轴的曲率，以及 - 将所述确定的偏差e或所述变化e与预定的发动机工作点相关阈值 e阈值或“e阈值以便决定燃烧 通过以下不等式是稳定的：e> e阈值或“e”e阈值意味着燃烧不稳定，e阈值或“e‰”e阈值意味着燃烧稳定。 该方法优选地应用于均质充气燃烧点火发动机（HCCI）。

    Method for determining and regulating the crank angle position of a crankshaft of a four-stroke internal combustion engine
    8.
    发明公开
    Method for determining and regulating the crank angle position of a crankshaft of a four-stroke internal combustion engine 审中-公开
    Verfahren zur Bestimmung und Regelung der Winkellage der Kurbenwelle einer Viertaktbrennkraftmaschine

    公开(公告)号：EP1736656A1

    公开(公告)日：2006-12-27

    申请号：EP05105668.7

    申请日：2005-06-24

    申请人： Ford Global Technologies, LLC.

    发明人： Chevalier, Alain ,  Christen, Urs ,  Vantine, Katie ,  Moraal, Paul Eduard ,  Bromham, Jim

    IPC分类号： F02D41/34 ,  F02D35/02 ,  G01L23/30

    CPC分类号： F02D41/009 ,  F02D35/023 ,  F02D2041/0092

    摘要： The present invention relates to a method for determining and regulating the crank angle position of a crankshaft of a four-stroke internal combustion engine with at least one cylinder which is controlled by an engine control unit (ECU), comprising the following steps
    ■ ascertaining the crank angle of the crankshaft by means of a crankshaft sensor, which scans the crankshaft, in particular a toothed wheel attached to the crankshaft,
    ■ determining the present phase of the respective operation cycle of said at least one cylinder by using at least one second sensor in order to distinguish between gas inlet and expansion stroke or gas outlet and compression stroke, and
    ■ synchronising the engine if necessary.
    It is the objective of the present invention to provide a method of the above mentioned kind which does not require fuelling the engine during the synchronization procedure.
    With respect to the objective a method is provided comprising the following steps:
    ■ using at least one pressure sensor as said at least one second sensor which is capable of detecting directly or indirectly a change of the in-cylinder pressure, in particular a rise of the in-cylinder pressure,
    ■ measuring at least once the output signal p Sensor,A of said at least one pressure sensor in a first crank angle domain comprising the top dead centre (TDC),
    ■ measuring at least once the output signal p Sensor,B of the at least one pressure sensor in a second crank angle domain spaced apart from said first crank angle domain ,
    ■ calculating the expression p = pSensor,A - P Sensor , B ,
    ■ comparing p with a predetermined threshold P threshold ,
    ■ synchronizing the engine by shifting the output signal of the ECU for injection and/or ignition by 360°CA forwards or backwards, if

    p ≤ p threshold

    摘要翻译： 本发明涉及一种用于确定和调节具有由发动机控制单元（ECU）控制的至少一个气缸的四冲程内燃机的曲轴的曲柄角位置的方法，包括以下步骤 - 确定 曲柄轴的曲轴角度通过曲轴传感器，曲轴传感器扫描曲轴，特别是连接到曲轴的齿轮， - 通过使用至少一个第二传感器来确定所述至少一个气缸的相应操作循环的当前阶段 以区分气体入口和膨胀冲程或气体出口和压缩冲程，以及 - 如有必要，同步发动机。 本发明的目的是提供一种在同步过程中不需要对发动机进行加油的上述方法。 关于该目的，提供了一种方法，其包括以下步骤： - 使用至少一个压力传感器作为所述至少一个第二传感器，其能够直接或间接检测缸内压力的变化，特别是 缸内压力， - 至少测量一次包括上死点（TDC）的第一曲柄角域中的所述至少一个压力传感器的所述至少一个压力传感器的传感器A，至少测量一次输出信号p传感器 在与所述第一曲柄角域间隔开的第二曲柄角域中的所述至少一个压力传感器的B，计算表达式p = pSensor，A-P Sensor，B， - 将p与预定阈值P阈值进行比较， 通过将注射和/或点火的ECU的输出信号向前或向后移动360°CA来同步发动机，如果p‰p阈值

    Method for automatically adapting lookup tables
    9.
    发明公开
    Method for automatically adapting lookup tables 有权
    Verfahren zur automatischen Anpassung der Lookup-Tabellen

    公开(公告)号：EP1712767A1

    公开(公告)日：2006-10-18

    申请号：EP05102979.1

    申请日：2005-04-15

    申请人： Ford Global Technologies, LLC.

    发明人： Chevalier, Alain ,  Christen, Urs ,  Vantine, Katie ,  Moraal, Paul Eduard

    IPC分类号： F02D41/24 ,  G05B13/02

    CPC分类号： F02D41/2422 ,  F02D41/2416 ,  F02D41/2429 ,  G05B13/024

    摘要： The present invention relates to a method for automatically adapting lookup tables.
    It is the objective of the present invention to provide a method for automatically adapting lookup tables, which overcomes the problems arising by using conventinal methods, in particular to improve the adaptation of point-based lookup tables.
    With respect to the object a method for automatically adapting lookup tables is provided, wherein the lookup table is a one-dimensional or multi-dimensional point-based lookup table with n ≥ 1 indexing parameters as input data and in which the output data are stored at the points, and which is characterised in that
    ■ a value domain Δ x for each indexing parameter x is assigned to each point of the point-based lookup table, where said value domain Δ x comprising said respective point, such that each point is surrounded by said value domain Δ x , and
    ■ the output data is adapted if the operation point defmed by the input data leads to a location in the lookup table which lies inside a value domain Δ x , and
    ■ the output data is interpolated if the operation point defined by the input data leads to a location in the lookup table which lies outside a value domain Δ x ,i.e., between the values domains Δ x .

    摘要翻译： 本发明涉及一种用于自动调整查找表的方法。 本发明的目的是提供一种自动适应查找表的方法，其克服了使用传统方法引起的问题，特别是改进基于点的查找表的适应。 提供了一种用于自动调整查找表的方法，其中查找表是一维或多维的基于点的查找表，其中n‰¥1的索引参数作为输入数据，其中输出数据是 存储在点上，其特征在于 - 对于每个索引参数x的值域“x”被分配给基于点的查找表的每个点，其中所述值域“x包括所述相应点”，使得每个点 被所述值域“x”围绕，并且 - 如果由输入数据定义的操作点导致位于值域“x”内的查找表中的位置，则输出数据被适配，以及 - 输出数据如果内插 由输入数据定义的操作点导致查找表中位于值域“x之外，即值域”x之间的位置。