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公开(公告)号：US5095742A
公开(公告)日：1992-03-17
申请号：US650266
申请日：1991-02-04
CPC分类号： G01M15/042 , F02D41/1497 , G01M15/11
摘要： A method and apparatus are provided for reliably detecting misfires in an internal combustion engine during actual driving conditions by monitoring fluctuations in engine speed between consecutive firing intervals. An average acceleration over a series of firing intervals is removed from an individual acceleration measurement corresponding to a particular firing interval to give an acceleration deviation which is then normalized to an expected torque to provide a power loss measurement. The power loss measurement indicates the occurrence of a misfire with a high signal-to-noise ratio. The information derived from misfire detection can be used to prevent destruction of a catalytic converter by unburned fuel mixtures and can be used to improve vehicle driveability by correcting for or indicating needed service for the vehicle. The misfire detection is implemented using existing sensors and processors and is adapted to be done on-board a vehicle in real time.
摘要翻译： 提供了一种方法和装置，用于通过监测连续点火间隔之间的发动机转速的波动来在实际行驶条件下可靠地检测内燃机中的火灾。 从与特定点火间隔相对应的单个加速度测量中去除一系列点火间隔上的平均加速度，以给出加速度偏差，然后将该加速度偏差归一化为预期转矩以提供功率损耗测量。 功率损耗测量表明发生具有高信噪比的失火。 来自失火检测的信息可用于防止未燃燃料混合物对催化转化器的破坏，并且可用于通过校正或指示车辆所需的服务来改善车辆驾驶性能。 使用现有的传感器和处理器实现失火检测，并且适于实时地在车载车辆上完成。
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2.发明授权
公开(公告)号：US5056360A
公开(公告)日：1991-10-15
申请号：US572282
申请日：1990-08-24
申请人： James M. Dosdall , John V. James
发明人： James M. Dosdall , John V. James
CPC分类号： G01M15/11 , F02D41/1498 , G01M15/046 , G01P15/165 , F02D2200/1015
摘要： Engine crankshaft velocity is determined during each firing interval of an engine. Pairs of velocities are combined to yield acceleration measurements indicating the work done by a particular cylinder in its power stroke. A deviation of a particular acceleration value from that of neighboring values denotes a lack of power in the corresponding cylinder. The width and the phase of each velocity interval are used which provide accurate and substantially independent acceleration measures for each power stroke. Specifically, the width of each interval is preferably between about 45.degree.-180.degree. of engine rotation. Each interval has a phase in relation to its respective power stroke such that the drop in acceleration occurring in a particular power stroke causes a maximum drop in the calculated acceleration corresponding to that particular power stroke and causes a smaller but substantially equal drop in the calculated accelerations corresponding to the preceding and following power strokes. The velocity measurement intervals can be defined by position reference marking signals generated at rotational positions corresponding to a point within the power strokes where a maximum acceleration would approximately occur during a proper firing of the power stroke.
摘要翻译： 发动机曲轴速度在发动机的每次起动间隔期间确定。 将一对速度组合以产生加速度测量值，表明特定气缸在其功率冲程中完成的功能。 特定加速度值与相邻值的偏差表示相应气缸中的功率不足。 使用每个速度间隔的宽度和相位，其为每个功率冲程提供精确且基本独立的加速度测量。 具体地说，每个间隔的宽度优选在发动机旋转的约45°-180°之间。 每个间隔具有与其相应的功率冲程相关的相位，使得在特定功率冲程中发生的加速度的下降导致对应于该特定功率冲程的计算加速度的最大下降并导致计算的加速度中较小但基本相等的下降 对应于上述和之后的功率冲程。 速度测量间隔可以通过在对应于功率冲程内的点处产生的位置参考标记信号来定义，其中最大加速度将在正常击发功率冲程期间大致出现。
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公开(公告)号：US5044195A
公开(公告)日：1991-09-03
申请号：US572650
申请日：1990-08-24
CPC分类号： F02D41/1497 , G01M15/11
摘要： A method and apparatus are provided for reliably detecting misfires in an internal combustion engine during actual driving conditions by monitoring fluctuations in engine speed between consecutive firing intervals. An average acceleration over a series of firing intervals is removed from an individual acceleration measurement corresponding to a particular firing interval to give an acceleration deviation which is then normalized to an expected torque to provide a power loss measurement. The power loss measurement indicates the occurrence of a misfire with a high signal-to-noise ratio. The information derived from misfire detection can be used to prevent destruction of a catalytic converter by unburned fuel mixtures and can be used to improve vehicle driveability by correcting for or indicating needed service for the vehicle. The misfire detection is implemented using existing sensors and processors and is adapted to be done on-board a vehicle in real time.
摘要翻译： 提供了一种方法和装置，用于通过监测连续点火间隔之间的发动机转速的波动来在实际行驶条件下可靠地检测内燃机中的火灾。 从与特定点火间隔相对应的单个加速度测量中去除一系列点火间隔上的平均加速度，以给出加速度偏差，然后将该加速度偏差归一化为预期转矩以提供功率损耗测量。 功率损耗测量表明发生具有高信噪比的失火。 来自失火检测的信息可用于防止未燃燃料混合物对催化转化器的破坏，并且可用于通过校正或指示车辆所需的服务来改善车辆驾驶性能。 使用现有的传感器和处理器实现失火检测，并且适于实时地在车载车辆上完成。
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4.发明授权
公开(公告)号：US5528931A
公开(公告)日：1996-06-25
申请号：US417356
申请日：1995-04-05
摘要： A system and method compensates for systematic irregularities in measured engine velocities caused by torsional flexing in the crankshaft during rotation to improve the accuracy of misfire detection. A set of generated correction factors is stored in a table that are derived empirically using a test engine. The correction factors are adjusted during on-board operation of the engine whenever a safe adaptation time is determined.
摘要翻译： 一种系统和方法补偿了旋转期间由于曲轴扭转弯曲引起的测量发动机速度的系统不规则性，以提高失火检测的准确性。 一组生成的校正因子存储在根据经验使用测试引擎得出的表中。 每当确定安全的适应时间时，在发动机的车载操作期间调节校正因子。
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公开(公告)号：US5044194A
公开(公告)日：1991-09-03
申请号：US650102
申请日：1991-02-04
CPC分类号： F02D41/1497 , G01M15/042 , G01M15/11
摘要： A method and apparatus are provided for reliably detecting misfires in an internal combustion engine during actual driving conditions by monitoring fluctuations in engine speed between consecutive firing intervals. An average acceleration over a series of firing intervals is removed from an individual acceleration measurement corresponding to a particular firing interval to five an acceleration deviation which is then normalized to an expected torque to provide a power loss measurement. The power loss measurement indicates the occurrence of a misfire with a high signal-to-noise ratio. The information derived from misfire detection can be used to prevent destruction of a catalytic converter by unburned fuel mixtures and can be used to improve vehicle driveability by correcting for or indicating needed sevice for the vehicle. The misfire detection is implemented using existing sensors and processors and is adapted to be done on-board a vehicle in real time.
摘要翻译： 提供了一种方法和装置，用于通过监测连续点火间隔之间的发动机转速的波动来在实际行驶条件下可靠地检测内燃机中的火灾。 从对应于特定点火间隔的单个加速度测量值除去一系列点火间隔的平均加速度到五个加速度偏差，然后加速度偏差被归一化为预期转矩以提供功率损耗测量。 功率损耗测量表明发生具有高信噪比的失火。 从失火检测得到的信息可用于防止未燃烧燃料混合物破坏催化转化器，并可用于通过校正或指示车辆的所需服务来改善车辆驾驶性能。 使用现有的传感器和处理器实现失火检测，并且适于实时地在车载车辆上完成。
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6.发明授权Diagnostic system using pattern recognition for electronic automotive control systems 失效电子汽车控制系统使用模式识别的诊断系统
公开(公告)号：US5041976A
公开(公告)日：1991-08-20
申请号：US399683
申请日：1989-08-28
CPC分类号： F02D41/22 , G01R31/007 , F02D41/1405 , Y02T10/40 , Y10S706/911
摘要： A system is disclosed for diagnosing faults in electronic control systems wherein a large volume of information is exchanged between the electronic control processor and a mechanical system under its control. The data is acquired such that parameter vectors describing the system operation are formed. The vectors are provided to a pattern recognition system such as a neural network for classification according to the operating condition of the electronically controlled system. For diagnosis of electronically controlled engine operation, the parameters included in the vectors correspond to individual firing events occurring in the engine operating under a predetermined condition. The diagnostic system can be implemented as a service tool in an automotive service bay or can be implemented within the on-board electronic control system itself.
摘要翻译： 公开了一种用于诊断电子控制系统中的故障的系统，其中在电子控制处理器与其控制下的机械系统之间交换大量信息。 获取数据，从而形成描述系统操作的参数向量。 矢量被提供给模式识别系统，例如根据电子控制系统的操作条件进行分类的神经网络。 对于电控发动机操作的诊断，包括在矢量中的参数对应于在预定条件下运行的发动机中发生的各个点火事件。 诊断系统可以实现为汽车服务舱中的服务工具，或者可以在车载电子控制系统本身内实现。
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7.发明授权Cylinder number identification on a distributorless ignition system engine lacking CID 失效无分配器点火系统发动机上的气缸号识别缺乏CID
公开(公告)号：US5493496A
公开(公告)日：1996-02-20
申请号：US991027
申请日：1992-12-15
申请人： John V. James , James M. Dosdall
发明人： John V. James , James M. Dosdall
CPC分类号： F02P15/08 , F02P15/006 , F02P15/008 , F02P17/04 , F02P17/12 , F02P7/077 , F02D2041/0092 , F02P2017/003
摘要： An apparatus for identifying the power stroke of a particular cylinder in a multi-cylinder engine which utilizes a wasted spark electronic distributorless ignition system but lacks a camshaft driven cylinder identification sensor, wherein a single sensor can be placed in a coil pack adjacent to and substantially equidistant from the ignition coil towers. The sensor will produce a signal reflecting the difference in voltage drops between corresponding pairs of spark plugs who share the same coil and which utilizes this signal to determine the power stroke of individual cylinders to produce a resulting synthetic cylinder identification signal. This apparatus can further be used as a permanent on-board sensor, thereby negating the need for a separate camshaft driven sensor, to determine the cylinder identification.
摘要翻译： 一种用于识别多气缸发动机中的特定气缸的功率冲程的装置，其利用浪费的电子无分配器点火系统，但缺少凸轮轴驱动的气缸识别传感器，其中单个传感器可以放置在相邻并且基本上 与点火线圈塔等距。 该传感器将产生一个信号，反映出共享相同线圈的相应的火花塞对之间的电压差的差异，并利用该信号来确定各个气缸的功率行程以产生最终的合成气缸识别信号。 该装置可以进一步用作永久性板载传感器，从而不需要单独的凸轮轴驱动传感器来确定气缸识别。
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8.发明授权
公开(公告)号：US5117681A
公开(公告)日：1992-06-02
申请号：US590729
申请日：1990-10-01
申请人： James M. Dosdall , John V. James
发明人： James M. Dosdall , John V. James
IPC分类号： F02D41/24 , F02D41/34 , F02P7/067 , F02P7/077 , G01M15/06 , G01M15/11 , G01P3/48 , G01P21/02
CPC分类号： G01M15/06 , F02D41/009 , F02D41/123 , F02D41/2441 , F02D41/2474 , F02P7/0675 , F02P7/0775 , G01M15/11 , G01P21/02 , G01P3/4807 , F02D41/2432
摘要： Systematic errors in manufacturing of position markers of an internal combustion engine position sensing system are corrected by a procedure which detects nonuniformities in the placement of the position markers using an engine coastdown without combustion in the cylinders. Since the coastdown comprises a smooth deceleration, any nonuniformities detected in the velocities calculated for individual firing intervals during the coastdown are a manifestation of nonuniformities in the position marker placement. These nonuniformities are used to calculate correction factors which are stored for use when calculating velocities during engine combustion.
摘要翻译： 内燃机位置检测系统的位置标记的制造中的系统误差通过在气缸中不发生燃烧来检测位置标记的位置检测不均匀性的程序来校正， 由于减速包括平滑的减速度，因此在下降期间针对各个点火间隔计算的速度中检测到的任何不均匀性都是位置标记位置不均匀的表现。 这些不均匀性用于计算在发动机燃烧期间计算速度时存储供使用的校正因子。
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公开(公告)号：US5109695A
公开(公告)日：1992-05-05
申请号：US710841
申请日：1991-06-05
CPC分类号： F02D41/1497 , G01M15/11
摘要： A method and apparatus are provided for reliably detecting misfires in an internal combustion engine during actual driving conditions by monitoring fluctuations in engine speed between consecutive firing intervals. An average acceleration over a series of firing intervals is removed from an individual acceleration measurement corresponding to a particular firing interval to give an acceleration deviation which is then normalized to an expected torque to provide a power loss measurement. The power loss measurement indicates the occurrence of a misfire with a high signal-to-noise ratio. The information derived from misfire detection can be used to prevent destruction of a catalytic converter by unburned fuel mixtures and can be used to improve vehicle driveability by correcting for or indicating needed service for the vehicle. The misfire detection is implemented using existing sensors and processors and is adapted to be done on-board a vehicle in real time. Noise present in the acceleration data is measured and a no-test condition is recognized depending on the magnitude of the measured noise.
摘要翻译： 提供了一种方法和装置，用于通过监测连续点火间隔之间的发动机转速的波动来在实际行驶条件下可靠地检测内燃机中的火灾。 从与特定点火间隔相对应的单个加速度测量中去除一系列点火间隔上的平均加速度，以给出加速度偏差，然后将该加速度偏差归一化为预期转矩以提供功率损耗测量。 功率损耗测量表明发生具有高信噪比的失火。 来自失火检测的信息可用于防止未燃燃料混合物对催化转化器的破坏，并且可用于通过校正或指示车辆所需的服务来改善车辆驾驶性能。 使用现有的传感器和处理器实现失火检测，并且适于实时地在车载车辆上完成。 测量加速度数据中存在的噪声，并根据测得的噪声的大小来识别无测试条件。
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