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    System for controlling an operating condition of an internal combustion engine
    1.
    发明授权
    System for controlling an operating condition of an internal combustion engine 有权
    用于控制内燃机的运行状态的系统

    公开(公告)号：US06619261B1

    公开(公告)日：2003-09-16

    申请号：US10103427

    申请日：2002-03-21

    申请人： Yue Yun Wang ,  David A. Vittorio ,  John F. Wright

    发明人： Yue Yun Wang ,  David A. Vittorio ,  John F. Wright

    IPC分类号： F02M700

    CPC分类号： F02D35/024 ,  F02B29/0406 ,  F02B29/0493 ,  F02D41/0065 ,  F02D41/1447 ,  F02D41/145 ,  F02M26/05 ,  F02M26/10 ,  F02M26/23 ,  F02M26/33 ,  F02M26/47 ,  F02M26/61

    摘要： A system for controlling an operating condition of an internal combustion engine includes a control mechanism responsive to a final control command to establish an engine control parameter, and a control computer configured to estimate a current value of the operating condition as a function of the final control command. The control computer determines an error value as a difference between an operating condition limit and the current value of the operating condition, and determines an operating condition parameter as function of the error value and of the current value of the operating condition. The control computer further determines a control command limit as a function of the operating condition parameter, and determines the final control command as a function of the control command limit and a default control command to thereby limit the operating condition to the operating condition limit.

    摘要翻译： 一种用于控制内燃机的运行状况的系统包括响应于最终控制命令以建立发动机控制参数的控制机构，以及控制计算机，被配置为根据最终控制来估计运行状态的当前值 命令。 控制计算机将误差值确定为操作条件极限和操作条件的当前值之间的差，并且确定作为错误值和操作条件的当前值的函数的操作条件参数。 控制计算机还根据操作条件参数确定控制命令限制，并且根据控制命令限制和默认控制命令确定最终控制命令，从而将操作条件限制为操作条件极限。

    Method and apparatus for estimation of relative cylinder compression balance by cranking speed analysis
    4.
    发明授权
    Method and apparatus for estimation of relative cylinder compression balance by cranking speed analysis 有权
    通过起动速度分析估算相对气缸压缩平衡的方法和装置

    公开(公告)号：US6055852A

    公开(公告)日：2000-05-02

    申请号：US187675

    申请日：1998-11-06

    申请人： Yue Yun Wang ,  Paul R. Miller ,  George G. Zhu

    发明人： Yue Yun Wang ,  Paul R. Miller ,  George G. Zhu

    IPC分类号： G01M3/02 ,  G01M15/04 ,  G01M15/00

    CPC分类号： G01M3/025 ,  F02D41/1498 ,  G01M15/046 ,  F02D2200/1015

    摘要： The present invention gathers and processes engine speed and position information gathered during cranking, without fuel injection or combustion, in order to derive a set of parameters that are shown to correlate very well with the presence of cylinder compression leakage. Using engine speed and position information from, for example, camshaft gear targets, crankshaft tonewheels, or the flywheel itself, etc., a parameter designated as "metric distance" between adjacent firing cylinder speed fluctuation pulses is determined. For engines with well-balanced cylinder compression, the values of the metric distances measured between all cylinders should be close to each other within a certain threshold. If a cylinder exhibits leakage, the metric distance of the cylinder from its adjacent firing cylinders will significantly exceed the threshold, thereby detecting a leaking cylinder. The method of the present invention also provides a relative estimation of the percentage compression loss from the leaking cylinder. This provides valuable information for service personnel to quickly determine the cause of engine delivering low power. In addition to the service application of the present invention, the present invention may also be used on a continuous or semi-continuous basis (for example, each engine startup) to provide a degree of prognostics or early warning of worsening cylinder compression balance.

    摘要翻译： 本发明收集并处理在起动期间收集的发动机速度和位置信息，而不需要燃料喷射或燃烧，以便导出一组参数，其被示出与气缸压缩泄漏的存在非常相关。 使用来自例如凸轮轴齿轮目标，曲轴轮轴或飞轮本身的发动机速度和位置信息等，确定在相邻起动缸速度波动脉冲之间指定为“公制距离”的参数。 对于具有平衡气缸压缩的发动机，在所有气缸之间测量的公制距离的值应在一定阈值内彼此接近。 如果气缸呈现泄漏，气缸与其相邻点火缸的公制距离将显着超过阈值，从而检测泄漏气缸。 本发明的方法还提供了来自泄漏缸的压缩损失百分比的相对估计。 这为服务人员提供有价值的信息，以便快速确定发动机低功率的原因。 除了本发明的服务应用之外，本发明还可以连续或半连续（例如，每个发动机起动）来使用，以提供对气缸压缩平衡恶化的一定程度的预测或预警。

    System for diagnosing operation of a cooling system for an internal combustion engine
    6.
    发明授权
    System for diagnosing operation of a cooling system for an internal combustion engine 有权
    用于诊断用于内燃机的冷却系统的操作的系统

    公开(公告)号：US06925376B2

    公开(公告)日：2005-08-02

    申请号：US10404757

    申请日：2003-04-01

    申请人： Xiaoqiu Li ,  Todd C. Slater ,  Mark R. Stepper ,  Anthony J. Abbenante ,  Stephanie L. Goerges ,  Yue Yun Wang

    发明人： Xiaoqiu Li ,  Todd C. Slater ,  Mark R. Stepper ,  Anthony J. Abbenante ,  Stephanie L. Goerges ,  Yue Yun Wang

    IPC分类号： F01P11/14 ,  F01P11/16 ,  G60G7/70

    CPC分类号： F01P11/16 ,  F01P11/14 ,  F01P2023/00 ,  F01P2023/08 ,  F01P2025/08 ,  F01P2025/62 ,  F01P2031/00

    摘要： A system for diagnosing operation of a cooling system for an internal combustion engine includes a coolant temperature sensor producing a temperature signal corresponding to coolant fluid temperature, means for determining either an engine load or a throttle percentage, and a control computer configured to diagnose operation of the cooling system as a function of the temperature signal, either the engine load or throttle percentage, and a fuel delivery command for controllably supplying fuel to the engine. After expiration of a diagnostic period, the control computer diagnoses the cooling system as normally operating if the diagnostic period ended by the temperature signal meeting or exceeding a predefined temperature and if a total energy used by the engine during the diagnostic period is less than an estimated energy, and diagnoses the cooling system as failing if the total energy used during the diagnostic period otherwise meets or exceeds the estimated energy.

    摘要翻译： 用于诊断内燃机的冷却系统的操作的系统包括：冷却剂温度传感器，其产生对应于冷却剂流体温度的温度信号，用于确定发动机负载或节流百分比的装置;以及控制计算机， 作为温度信号的函数的冷却系统，发动机负载或节流百分比，以及用于可控地向发动机供应燃料的燃料输送命令。 在诊断期限结束后，如果诊断期间以温度信号满足或超过预定温度结束，则控制计算机将冷却系统诊断为正常运行，并且如果诊断期间发动机使用的总能量小于估计值 能量，并且如果在诊断期间使用的总能量否则满足或超过估计的能量，则将冷却系统诊断为故障。

    System for diagnosing EGR flow rate operation
    7.
    发明授权
    System for diagnosing EGR flow rate operation 有权
    用于诊断EGR流量运行的系统

    公开(公告)号：US06802302B1

    公开(公告)日：2004-10-12

    申请号：US10409307

    申请日：2003-04-08

    申请人： Xiaoqiu Li ,  Mark R. Stepper ,  Stephanie L. Goerges ,  Yue Yun Wang

    发明人： Xiaoqiu Li ,  Mark R. Stepper ,  Stephanie L. Goerges ,  Yue Yun Wang

    IPC分类号： F02M2507

    CPC分类号： F02D21/08 ,  F02B29/0406 ,  F02D41/0072 ,  F02M26/05 ,  F02M26/23 ,  F02M26/47 ,  F02M26/49 ,  Y02T10/47

    摘要： A system is disclosed for diagnosing EGR flow rate operation in an internal combustion engine includes an intake manifold and an exhaust manifold coupled to the engine and an EGR conduit for recirculating exhaust gas from the exhaust manifold to the intake manifold. Means are provided for determining an EGR fraction corresponding to a fractional amount of recirculated exhaust gas in a total air charge supplied to the intake manifold. A control computer is configured to continually accumulate at least one EGR fraction error sum as a function of the EGR fraction and a desired EGR fraction, and to diagnose EGR flow rate operation as a function of the accumulated value of the at least one EGR fraction error sum.

    摘要翻译： 公开了一种用于诊断内燃机中的EGR流量操作的系统，其包括联接到发动机的进气歧管和排气歧管以及用于将废气从排气歧管再循环到进气歧管的EGR导管。 提供了用于确定与供应到进气歧管的总空气气体中的再循环废气的分数量相对应的EGR分数的装置。 控制计算机被配置为连续累积作为EGR分数和期望EGR分数的函数的至少一个EGR分数误差和，并且作为至少一个EGR分数误差的累积值的函数来诊断EGR流量操作 和。

    System and method for cylinder power imbalance prognostics and diagnostics
    8.
    发明授权
    System and method for cylinder power imbalance prognostics and diagnostics 有权
    气缸功率不平衡预测和诊断的系统和方法

    公开(公告)号：US06230095B1

    公开(公告)日：2001-05-08

    申请号：US09401179

    申请日：1999-09-22

    申请人： Yue Yun Wang

    发明人： Yue Yun Wang

    IPC分类号： G01M1500

    CPC分类号： G01M15/11

    摘要： A system and method for the diagnosis and prognosis of cylinder power imbalance in an internal combustion engine utilizes cylinder firing times to determine a differential value indicative of the power imbalance. This differential value identifies a cylinder power imbalance condition and can be used in a one dimensional or a two dimensional analysis to predict future engine performance. In one embodiment, a trend parameter is calculated from the differential values over several test sequences at periodic mileage of the vehicle. The rate and magnitude of change or deterioration of the engine performance is indicated by the trend parameter. In another embodiment, a two dimensional trend array is evaluated using singular value decomposition to arrive at an eigenvalue transformation matrix used to obtain two trend variables related to the two principal eigenvalues at a particular engine operating hour/mileage. In one specific embodiment, the two trend variables are converted to polar coordinates in which the polar radius &rgr; is indicative of the severity of the imbalance condition and the polar angle &thgr; is indicative of the cause or of a change of cause for the engine power imbalance.

    摘要翻译： 用于诊断和预测内燃机气缸功率不平衡的系统和方法利用气缸点火时间来确定表示功率不平衡的差分值。 该差分值识别气缸功率不平衡条件，并且可以用于一维或二维分析以预测未来的发动机性能。 在一个实施例中，根据车辆的周期里程上的几个测试序列的差分值来计算趋势参数。 发动机性能的变化率或变化幅度由趋势参数表示。 在另一个实施例中，使用奇异值分解来评估二维趋势数组，得到特征值变换矩阵，用于在特定发动机运行小时/里程处获得与两个主要特征值相关的两个趋势变量。 在一个具体实施例中，将两个趋势变量转换为极坐标，其中极坐标半径rho表示不平衡状况的严重性，极角θ表示发动机功率不平衡的原因或原因变化 。

    System for diagnosing delta pressure sensor operation
    9.
    发明授权
    System for diagnosing delta pressure sensor operation 有权
    用于诊断三角压力传感器操作的系统

    公开(公告)号：US06850833B1

    公开(公告)日：2005-02-01

    申请号：US10700104

    申请日：2003-11-03

    申请人： Yue Yun Wang ,  Peter Rauznitz ,  Martin T. Brooks

    发明人： Yue Yun Wang ,  Peter Rauznitz ,  Martin T. Brooks

    IPC分类号： F02D21/08 ,  F02D41/22 ,  F02M25/07 ,  G01F1/36 ,  G01F9/00 ,  G01F9/02 ,  G01F15/00 ,  G01F25/00 ,  G01L27/00 ,  G01M19/00 ,  G01P5/00

    CPC分类号： G01F25/0007 ,  F02D41/0055 ,  F02D41/222 ,  F02M26/05 ,  F02M26/23 ,  F02M26/47 ,  F02M26/49 ,  G01F1/36 ,  G01F9/001 ,  G01F9/023 ,  G01F15/005 ,  G01L27/007 ,  Y02T10/47

    摘要： A system for diagnosing operation of a delta pressure sensor used with an internal combustion engine comprises an intake manifold and an exhaust manifold each operatively coupled to the engine, an EGR conduit fluidly coupled between the intake and exhaust manifolds, and a flow restriction mechanism disposed in-line with the EGR conduit, wherein the delta pressure sensor produces a delta pressure signal indicative of a pressure differential across the flow restriction mechanism. A control computer compares the delta pressure signal to a modeled delta pressure value modeled as a function of at least engine speed and one of engine load and engine output torque percentage, and diagnoses a fault state of the delta pressure sensor based on the comparison.

    摘要翻译： 用于诊断与内燃机一起使用的增量压力传感器的操作的系统包括进气歧管和排气歧管，每个进气歧管和排气歧管各自可操作地联接到发动机，流体耦合在进气歧管和排气歧管之间的EGR导管以及设置在 与所述EGR导管连接，其中所述增量压力传感器产生指示所述流动限制机构的压力差的增量压力信号。 控制计算机将增量压力信号与作为至少发动机转速和发动机负荷和发动机输出扭矩百分比之一的模型建模的增量压力值进行比较，并且基于该比较来诊断增量压力传感器的故障状态。

    Sensor failure accommodation system
    10.
    发明授权
    Sensor failure accommodation system 有权
    传感器故障调节系统

    公开(公告)号：US06804601B2

    公开(公告)日：2004-10-12

    申请号：US10101790

    申请日：2002-03-19

    申请人： Yue Yun Wang ,  Dennis Robinson ,  George Brunemann ,  Danny R. Baker

    发明人： Yue Yun Wang ,  Dennis Robinson ,  George Brunemann ,  Danny R. Baker

    IPC分类号： G06F720

    CPC分类号： F02D41/222 ,  F02D2041/227 ,  F02D2200/0402 ,  F02D2200/0406 ,  F02D2200/0408 ,  F02D2200/0414 ,  G05B9/02 ,  Y02T10/40

    摘要： A sensor failure accommodation system includes a control computer receiving a sensor signal corresponding to an engine operating condition, and estimating a value of the engine operating condition as a function of one or more engine operating parameters different than the engine operating condition. The computer is operable to control one or more air handling mechanisms as a function of a final engine operating condition value, and if the sensor producing the engine operating condition signal is error free the final engine operating condition value is the engine operating condition signal. If the sensor producing the engine operating condition signal has failed, the final engine operating condition value is the engine operating condition estimate, and if at least one sensor producing the one or more engine operating parameters has also failed, the final engine operating condition value is a commanded or other definable engine operating condition value.

    摘要翻译： 传感器故障调节系统包括控制计算机，其接收对应于发动机运行状态的传感器信号，并且根据与发动机工作条件不同的一个或多个发动机运行参数来估计发动机运转状态的值。 计算机可操作以根据最终的发动机运行状态值来控制一个或多个空气处理机构，并且如果产生发动机运转状态信号的传感器是无误差的，则最终的发动机运行状态值是发动机运转状态信号。 如果产生发动机运行状态信号的传感器发生故障，则最终的发动机运转状态值是发动机运转状况估计值，如果产生一个或多个发动机运转参数的至少一个传感器也失效，则最终的发动机运转状态值为 命令或其他可定义的发动机工况条件值。