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    Method for determining an index of the fuel combustion in an engine cylinder
    1.
    发明授权
    Method for determining an index of the fuel combustion in an engine cylinder 有权
    用于确定发动机气缸中的燃料燃烧指数的方法

    公开(公告)号：US08676471B2

    公开(公告)日：2014-03-18

    申请号：US12914807

    申请日：2010-10-28

    申请人： Alessandro Catanese ,  Fabio Autieri ,  Claudio Monferrato

    发明人： Alessandro Catanese ,  Fabio Autieri ,  Claudio Monferrato

    IPC分类号： G01M15/08 ,  G01L23/30 ,  F02B77/08 ,  F02D35/02 ,  F02D45/00

    CPC分类号： F02D35/028 ,  F02D35/023

    摘要： A method is provided for determining an index representing the crank angle at which a given fuel mass fraction has been burnt in a cylinder of the engine during an engine cycle. The method includes, but is not limited to sampling the pressure within the cylinder during the engine cycle, using the pressure samples for determining the heat release rate curve during the engine cycle, using the heat release rate curve for determining the cumulative heat release curve during the engine cycle, determining a minimum value and a maximum value of the cumulative heat release curve, using the given fuel mass fraction for calculating a target value of the cumulative heat release between the minimum and maximum values, finding a goal point of the cumulative heat release curve that corresponds to the target value, assuming the crank angle corresponding to the goal point as the index. The method further includes, but is not limited to determining an opening angle within the crank angular range corresponding to compression stroke of the engine cycle, determining a closing angle within the crank angular range corresponding to the expansion stroke of the engine cycle, using the opening and closing angles for delimiting between them a first angular window, and limiting the determination of the minimum and maximum values of the cumulative heat release curve within the first angular window.

    摘要翻译： 提供了一种用于确定表示在发动机循环期间给定燃料质量分数在发动机的气缸中燃烧的曲柄角的指标的方法。 该方法包括但不限于在发动机循环期间使用用于确定发动机循环期间的放热速率曲线的压力样本使用用于确定在发动机循环期间的累积放热曲线的放热速率曲线来对发动机循环期间的气缸内的压力进行取样 发动机循环，使用给定的燃料质量分数来确定累积放热曲线的最小值和最大值，以计算最小值和最大值之间的累积放热的目标值，找到累积热量的目标点 释放曲线对应于目标值，假设对应于目标点的曲柄角为指标。 该方法还包括但不限于确定与发动机循环的压缩冲程相对应的曲柄角度范围内的开度角，使用开度确定与发动机循环的膨胀冲程相对应的曲柄角度范围内的关闭角度 以及用于在它们之间划定第一角度窗的闭合角度，并且限制第一角度窗内的累积放热曲线的最小值和最大值的确定。

    METHOD FOR DETERMINING THE TOTAL PRESSURE IN THE CYLINDER OF AN ENGINE
    5.
    发明申请
    METHOD FOR DETERMINING THE TOTAL PRESSURE IN THE CYLINDER OF AN ENGINE 审中-公开

    公开(公告)号：US20170212002A1

    公开(公告)日：2017-07-27

    申请号：US15328817

    申请日：2015-07-21

    申请人： CONTINENTAL AUTOMOTIVE FRANCE ,  CONTINENTAL AUTOMOTIVE GMBH

    发明人： Bertrand VAROQUIE ,  Christophe BOUQUEY

    IPC分类号： G01L23/30 ,  G01M15/08 ,  F02D41/40 ,  F02D35/02

    CPC分类号： G01L23/30 ,  F02D35/024 ,  F02D41/40 ,  F02D41/402 ,  G01M15/08 ,  Y02T10/44

    摘要： A method (45) for determining the total pressure in a cylinder (Pcyl) of an engine as a function of the angular position (crk) of a crankshaft (14) and from a quantity of fuel to be injected in possibly several injections, includes: determining the pressure in the cylinder when there is no combustion, the pressure being called the pressure without combustion (Pcyl_m), determining, for each injection (inji), a curve of sub-variation of pressure (ΔPcomb_i) caused by the combustion of the fuel quantity injected during the such injection (inji), the shape of the curve being estimated as a function of the quantity of fuel to be injected (MFi) and of the angular position for start of injection (SOIi) of the corresponding injection, determining the total pressure in the cylinder (Pcyl) by adding together the pressure without combustion (Pcyl_m) and the pressures given by the pressure sub-variation curves (ΔPcomb_i) of each injection (inji).

    Method of and apparatus for detecting maximum cylinder pressure angle in internal combustion engine
    6.
    发明授权
    Method of and apparatus for detecting maximum cylinder pressure angle in internal combustion engine 失效
    内燃机最大气缸压角检测方法及装置

    公开(公告)号：US4739649A

    公开(公告)日：1988-04-26

    申请号：US63937

    申请日：1987-06-19

    申请人： Akira Tanaka

    发明人： Akira Tanaka

    IPC分类号： G01L23/30 ,  F02D45/00 ,  F02P5/155 ,  G01M15/08 ,  G01M15/00

    CPC分类号： G01M15/08 ,  F02P5/1553 ,  Y02T10/46

    摘要： A method of and an apparatus for detecting the maximum cylinder pressure angle in an internal combustion engine. The method comprises the steps of measuring the time lapse required for the engine crankshaft to pass between a reference crankshaft angle such as TDC and the crankshaft angle at which the cylinder pressure becomes maximum and multiplying the measured time lapse by a time-angle conversion factor. The rate of change in the engine rotation speed is taken into consideration in carrying out the time-angle conversion so that it is possible to accurately determine the position at which the cylinder pressure becomes maximum in terms of crankshaft angle regardless of the operating condition of the engine. In the apparatus, the engine speed change rate is also compensated. The time-angle conversion can be carried out accurately even when there is used a crankshaft angle sensor which detects the crankshaft angle at relatively large intervals such as once every 30 degrees.

    摘要翻译： 一种用于检测内燃机中最大气缸压角的方法和装置。 该方法包括以下步骤：测量发动机曲轴在诸如TDC的参考曲轴角度和气缸压力变为最大值的曲轴角度之间经过所需的时间间隔，并将测量的时间经过乘以时间角转换因子。 在执行时间角转换时考虑发动机转速的变化率，使得可以根据曲轴角度精确地确定气缸压力变为最大的位置，而与 发动机。 在该装置中，发动机转速变化率也得到补偿。 即使使用曲轴角度传感器，也可以精确地进行时间角转换，该曲轴角度传感器以相对大的间隔检测曲轴角度，例如每30度一次。

    System for measuring crank angle for internal combustion engine
    7.
    发明授权
    System for measuring crank angle for internal combustion engine 失效
    内燃机曲柄角测量系统

    公开(公告)号：US4483183A

    公开(公告)日：1984-11-20

    申请号：US384815

    申请日：1982-06-03

    申请人： Hitoshi Suzuki ,  Tokuro Morozumi

    发明人： Hitoshi Suzuki ,  Tokuro Morozumi

    IPC分类号： F02D45/00 ,  F02P7/06 ,  G01B21/22 ,  G01L23/24 ,  G01L23/30 ,  G01P3/481 ,  G01M15/00

    CPC分类号： F02P7/061 ,  G01L23/24 ,  G01L23/30

    摘要： A system for measuring crank angle of an internal combustion engine by detecting the variation of the pressure in the induction passage of the engine. The system is provided with a pressure sensor responsive to the pressure in the induction passage for generating an output signal, and a pulse generating circuit. The pulse generating circuit operates to produce pulses from the variation of the output signal of the pressure sensor and comprises a circuit for producing a mean value between the maximum value and the minimum value of the output signal.

    摘要翻译： 一种用于通过检测发动机的进气通道中的压力的​​变化来测量内燃机的曲柄角的系统。 该系统具有响应于感应通道中的压力以产生输出信号的压力传感器和脉冲发生电路。 脉冲发生电路用于从压力传感器的输出信号的变化产生脉冲，并且包括用于产生输出信号的最大值和最小值之间的平均值的电路。

    Method and control device for determining reliability regarding misfire determination of cylinders of an internal combustion engine
    10.
    发明授权
    Method and control device for determining reliability regarding misfire determination of cylinders of an internal combustion engine 有权

    公开(公告)号：US11203994B2

    公开(公告)日：2021-12-21

    申请号：US17253880

    申请日：2019-06-14

    申请人： Scania CV AB

    发明人： Björn Nybäck ,  Ola Stenlåås ,  Oskar Kleback

    IPC分类号： F02D41/14 ,  G01M15/11 ,  F02D41/00 ,  G01L23/30 ,  G01L23/24

    摘要： Disclosed is a method for determining reliability regarding misfire determination of cylinders of an engine, comprising detecting a pressure in an exhaust manifold for a set of operation parameters comprising a certain range of crank angles for a certain engine load and certain engine speed so as to, for an actual cylinder setup of the engine, create pressure sample value patterns for combustion and misfire conditions. A template course is created for the thus created pressure sample value patterns comprising a set of sample points. The pressure for the created template courses is normalized at a desired crank angle. Difference values are determined based upon differences between sample points and corresponding detected and the normalized pressure values. The determined difference values are summarized so as to determine whether a predetermined share of the summarized difference values lies above or below a predetermined threshold value indicating reliability regarding misfire determination.