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    Method to determine performance characteristic of an engine exhaust system
    1.
    发明公开
    Method to determine performance characteristic of an engine exhaust system 审中-公开
    Verfahren zur Bestimmung der Leistungseigenschaften eines Motorabgassystems

    公开(公告)号：EP2628930A2

    公开(公告)日：2013-08-21

    申请号：EP13152353.2

    申请日：2013-01-23

    申请人： Delphi Technologies, Inc.

    发明人： Simpson, Kenneth ,  Jeffers, James ,  French, Mike

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1474 ,  F02D41/0087 ,  F02D41/1444 ,  F02D41/1476

    摘要： A method (200) to determine a performance characteristic of an exhaust system (14) of an engine (10), where the exhaust system (14) includes an exhaust gas sensor (22) that outputs an exhaust gas signal (28). A combustion event in a cylinder (18a) is fueled at an air-fuel ratio selected to produce exhaust gas that is expected to be distinguishable by the exhaust gas sensor (22) from exhaust gas produced by other combustion events (32), and used to determine the performance characteristic. The performance characteristic may be an exhaust gas transport time (30) of the exhaust system (14), a sensitivity characteristic of the exhaust gas sensor (22), or a fueling correction value necessary to restore fueling to, for example, stoichiometry. Such a method (200) is useful to detect physical changes in the exhaust system (14) such as relocating the exhaust gas sensor (22), or detect if the exhaust gas sensor (22) is damaged or not operating properly.

    摘要翻译： 一种用于确定发动机（10）的排气系统（14）的性能特性的方法（200），其中排气系统（14）包括输出排气信号（28）的排气传感器（22）。 气缸（18a）中的燃烧事件以选择的空气燃料比燃料，以产生期望由废气传感器（22）与其它燃烧事件（32）产生的废气可区分的废气，并使用 以确定性能特征。 性能特征可以是排气系统（14）的废气输送时间（30），废气传感器（22）的灵敏度特性，或者将例如化学计量的燃料补给所必需的加燃料校正值。 这种方法（200）可用于检测排气系统（14）中的物理变化，例如重新定位废气传感器（22），或检测废气传感器（22）是否损坏或不能正常工作。

    VERFAHREN ZUM EINSTELLEN DES LUFT-/KRAFTSTOFFVERHÄLTNISSES EINES VERBRENNUNGSMOTORS
    2.
    发明公开
    VERFAHREN ZUM EINSTELLEN DES LUFT-/KRAFTSTOFFVERHÄLTNISSES EINES VERBRENNUNGSMOTORS 有权
    VERFAHREN ZUM EINSTELLEN DES LUFT- /KRAFTSTOFFVERHÄLTNISSESEINES VERBRENNUNGSMOTORS

    公开(公告)号：EP2013464A1

    公开(公告)日：2009-01-14

    申请号：EP07722105.9

    申请日：2007-03-24

    申请人： IAV GmbH Ingenieurgesellschaft Auto und Verkehr

    发明人： BRUHN, Sven ,  SCHULTALBERS, Matthias ,  VON DER OHE, Thomas

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1454 ,  F02D41/1476

    摘要： The invention relates to a method for adjusting a fuel/air ratio by means of an on-off controller as well as a diagnostic method in which a desired fuel/air mixture is regulated in accordance with a test signal of a lambda probe that is embodied as a jump probe. The switching point of the on-off controller is moved/adapted while the oscillation of the test signal of the lambda probe is analyzed regarding the amplitude and/or the asymmetry of the oscillation around the switching point at a constant control stroke. A desired value for the asymmetry or the amplitude of the oscillation of the test signal of the lambda probe around the respective switching point is predefined, the switching point of the on-off controller being moved such that the desired value is reached.

    摘要翻译： 本发明涉及一种借助于通断控制器来调节燃料/空气比的方法以及一种诊断方法，其中根据所实施的拉姆达探针的测试信号调节期望的燃料/空气混合物 作为跳跃探测器。 在恒定的控制行程中分析关于开关点周围的振动的振幅和/或不对称性的λ探针的测试信号的振荡时，移动/调整通断控制器的开关点。 预定义了关于相应切换点周围的拉姆达探测器的测试信号的振荡的不对称性或振幅的期望值，开关控制器的切换点被移动，从而达到期望值。

    Air-fuel detection system using a limit current sensor
    8.
    发明公开
    Air-fuel detection system using a limit current sensor 失效
    通过限制电流传感器来空燃比检测系统

    公开(公告)号：EP0851108A3

    公开(公告)日：2000-07-12

    申请号：EP97122780.6

    申请日：1997-12-23

    申请人： DENSO CORPORATION

    发明人： Okazaki, Kazuhiro ,  Haseda, Satoshi ,  Jono, Hiroshi ,  Takami, Masayuki ,  Mizoguchi, Tomomichi

    IPC分类号： F02D41/14 ,  G01N27/406

    CPC分类号： G01N27/407 ,  F02D41/1456 ,  F02D41/1476

    摘要： A/F sensor (30) outputs a linear air-fuel ratio detection signal proportional to the oxygen concentration in an exhaust gas from an engine (10) upon application of a voltage. A computer (20) controls the applied-voltage in a stoichiometric control region, a lean burn control region, an atmosphere detection region and a rich control region to have a fixed value such that the change rate of the applied-voltage is reduced to be less than that in other regions. In addition, when changing the voltage applied to the A/F sensor (30), the computer 20 variably sets the voltage change speed sequentially. Thus, the influence of the capacitive characteristic of the A/F sensor (30) is eliminated.

    Method of and apparatus for detecting a deteriorated condition of a wide range air-fuel ratio sensor
    9.
    发明公开
    Method of and apparatus for detecting a deteriorated condition of a wide range air-fuel ratio sensor 失效
    用于诊断的λ探头的操作的劣化大的测量范围的方法和装置

    公开(公告)号：EP0841478A2

    公开(公告)日：1998-05-13

    申请号：EP97119445.1

    申请日：1997-11-06

    申请人： NGK Spark Plug Co. Ltd.

    发明人： Yamada, Tessho ,  Kawai, Takeshi ,  Oi, Yuji ,  Mori, Shigeki ,  Teramoto, Satoshi ,  Matsuoka, Toshiya

    IPC分类号： F02D41/22 ,  F02D41/14

    CPC分类号： F02D41/1495 ,  F02D41/1474 ,  F02D41/1476

    摘要： A method of detecting a deteriorated condition of a wide range air-fuel ratio sensor is provided. Firstly, a current is applied to an electromotive force cell to detect a voltage Vs0 across electrodes on opposite side surfaces of the cell. Application of the current is suspended, and a voltage drop Vsd1 across the electrodes is detected after lapse of a time ranging from 10 µs to 1 ms after the application of the current is suspended. Based on the voltage drop Vsd1 is detected a first resistance value Rvs1 equated to the temperature of the electromotive force cell. Further, after lapse of a time ranging from 10 ms to 50 ms after the application of the current to the electromotive force cell is suspended, a voltage drop Vsd2 across the electrodes of the electromotive force cell is detected. Based on the voltage drop Vsd2 is detected a second resistance value Rvs2 equated to an internal resistance of the electromotive force cell including a resistance component resulting from deterioration. By comparison of the resistance values Rvs1 and Rvs2, the deteriorated condition of the wide range air-fuel ratio is detected. An apparatus for carrying out such a method is also provided.

    摘要翻译： 设置检测宽范围空燃比传感器的劣化状态的方法。 首先，电流被施加到上电动势细胞检测细胞的相对侧表面上跨越的电极Vs0的电压。 当前的应用程序被暂停时，与当前的应用程序暂停后从10微秒至1毫秒的时间间隔之后检测到横跨Vsd1电极的电压降。 基于该电压降被检测Vsd1等同于电动势电池的温度的第一电阻值Rvs1。 此外，时间范围为10毫秒到电流与电动势细胞施用后50毫秒经过悬浮后，检测跨电动势细胞的程度较好的VSD2电极的电压降。 基于该电压降被检测程度较好的VSD2第二电阻值RVS2在电动势电池的内部电阻等同于包含电阻分量劣化所得。 由电阻的比较值Rvs1和RVS2，宽范围空燃比的劣化状态进行检测。 因此用于进行搜索的方法的装置被提供。