公开(公告)号：US07032439B2

公开(公告)日：2006-04-25

申请号：US10660036

申请日：2003-09-11

申请人： Anson Lee ,  Zhijian James Wu

发明人： Anson Lee ,  Zhijian James Wu

IPC分类号： G01M15/00

CPC分类号： G01M15/11

摘要： A method of detecting misfire events in an engine uses system identification technology. A linear model is determined for estimating engine firing events based on engine speed fluctuations. The linear model is represented as a difference equation. A Kalman filter is applied to the difference equation to determine unknown parameters of the linear model. Misfire events in the engine are detected based on the linear model.

摘要翻译： 在发动机中检测失火事件的方法使用系统识别技术。 基于发动机速度波动来确定用于估计发动机起动事件的线性模型。 线性模型表示为差分方程。 将卡尔曼滤波器应用于差分方程以确定线性模型的未知参数。 基于线性模型检测引擎中的失火事件。

公开(公告)号：US06286366B1

公开(公告)日：2001-09-11

申请号：US09189719

申请日：1998-11-11

申请人： Gang Chen ,  Zhijian James Wu ,  Anson Lee ,  Kerry D. Franks ,  Timothy L. McDonald ,  James R. Tamm

发明人： Gang Chen ,  Zhijian James Wu ,  Anson Lee ,  Kerry D. Franks ,  Timothy L. McDonald ,  James R. Tamm

IPC分类号： G01L326

CPC分类号： F02D41/32 ,  F02D41/0065 ,  F02D2200/0406 ,  F02D2200/0414

摘要： A technique for determining the charge air temperature within an intake manifold of an internal combustion engine of a vehicle without using a dedicated temperature sensor. The technique includes identifying a non-linear dynamic model based on the physical concepts of thermal transfer and system identification technique. The charge air temperature model uses several available physical measurements from the vehicle, including inlet air temperature, engine coolant temperature, vehicle speed, manifold pressure, engine speed, exhaust gas recirculation condition, and the engine fan on/off state. The model parameters are determined based on specific vehicle characteristics, and collected data from the vehicle. The charge air temperature is predicted by the model at regular predetermined intervals from the physical measurements, the vehicle parameters and the charge air temperature from the previous time. An estimation of an initial charge air temperature when the vehicle is turned on can be obtained based on the available temperature sensor readings when vehicle is turned on and stored data of the charge temperature, and all the measured temperature readings just before the engine was turned off.

摘要翻译： 一种用于在不使用专用温度传感器的情况下确定车辆内燃机的进气歧管内的增压空气温度的技术。 该技术包括基于热传递和系统识别技术的物理概念识别非线性动态模型。 增压空气温度模型使用来自车辆的几种可用的物理测量，包括入口空气温度，发动机冷却剂温度，车辆速度，歧管压力，发动机速度，废气再循环状况和发动机风扇开/关状态。 模型参数根据特定车辆特性确定，并从车辆收集数据。 从物理测量，车辆参数和前一次的增压空气温度以规定的预定间隔，模型预测增压空气温度。 可以基于车辆开启时可用的温度传感器读数和存储充电温度的数据以及在发动机关闭之前的所有测量温度读数来获得车辆接通时的初始增压空气温度的估计 。

公开(公告)号：US5862507A

公开(公告)日：1999-01-19

申请号：US835393

申请日：1997-04-07

申请人： Zhijian James Wu ,  Anson Lee

发明人： Zhijian James Wu ,  Anson Lee

IPC分类号： F02D41/14 ,  F02D41/34 ,  G01M15/11 ,  F02D41/00

CPC分类号： G01M15/11 ,  F02D41/1498 ,  F02D2041/288 ,  F02D2200/1015 ,  F02D2250/12

摘要： A method and system for detecting engine misfire in an internal combustion engine. A data signal containing a plurality of groups of data points generated from sampling crankshaft rotational displacement over three predetermined angular sampling windows is generated. Each of the plurality of groups of sampled data points represents a cylinder firing event. The data signal is conditioned, and the plurality of groups of sampled data points are mapped into single misfire detection data points. The mapped single misfire detection points are then compared to a misfire detection dynamic threshold, and a misfire detection signal is output if the misfire detection points fall outside the dynamic threshold. The misfire detection system achieves high degree of accuracy through a multi-stage signal conditioning, multi-rate signal processing and statistical decision technology and a mixed size of window sampling strategy, and is capable of being installed on a large scale in motor vehicles through use of existing onboard automotive microcontroller technology.

摘要翻译： 一种用于检测内燃机中发动机失火的方法和系统。 产生包含从三个预定角度采样窗口上取样曲轴旋转位移产生的多组数据点的数据信号。 多组采样数据点中的每一组表示气缸点火事件。 对数据信号进行调节，并将多组采样数据点映射到单个失火检测数据点。 然后将映射的单个失火检测点与失火检测动态阈值进行比较，并且如果失火检测点落在动态阈值之外，则输出失火检测信号。 失火检测系统通过多级信号调理，多速率信号处理和统计决策技术和窗口采样策略的混合大小实现了高度的准确性，并且能够通过使用大规模安装在机动车辆上 现有的车载微控制器技术。

公开(公告)号：US5717133A

公开(公告)日：1998-02-10

申请号：US755046

申请日：1996-11-22

申请人： Zhijian James Wu ,  Anson Lee

发明人： Zhijian James Wu ,  Anson Lee

IPC分类号： G01M15/11 ,  G01M15/00

CPC分类号： G01M15/11

摘要： The present invention provides a method of detecting internal combustion engine misfiring. The method includes mixed rate sampling of crankshaft angular velocity for a plurality of cylinder firing events to generate a crankshaft angular velocity signal and a cylinder firing synchronization signal. The apparatus for executing the method comprises a crankshaft in operative relation with the internal combustion engine. A crankshaft sensor wheel is rotatably triggered by the crankshaft and includes a plurality of predetermined sensor indicators disposed at least at two different angular widths. A sensor is positioned adjacent to the wheel for sensing the passage of each indicator in producing a signal pulse having a duration corresponding to the angular width of the sensed indicator in response thereto. A counter determines the time intervals between signal pulses generated by the sensor including a synchronization signal time interval and an RPM signal time interval. The synchronization signal time interval is then utilized to calculate a plurality of crankshaft angular velocities for a plurality of RPM indicators replaced by a synchronization indicator. A misfire detector then determines if a misfire has occurred by interpreting a series of data points developed from the plurality of crankshaft angular velocities.

摘要翻译： 本发明提供一种检测内燃机失火的方法。 该方法包括用于多个气缸点火事件的曲轴角速度的混合速率采样以产生曲轴角速度信号和气缸点火同步信号。 用于执行该方法的装置包括与内燃机操作关系的曲轴。 曲轴传感器轮由曲轴可旋转地触发，并且包括至少设置在两个不同角度宽度的多个预定传感器指示器。 传感器邻近车轮定位，用于感测每个指示器的通过，以产生具有对应于所响应的指示器的角宽度的持续时间的信号脉冲。 计数器确定由传感器产生的信号脉冲之间的时间间隔，包括同步信号时间间隔和RPM信号时间间隔。 然后利用同步信号时间间隔来计算由同步指示符代替的多个RPM指示器的多个曲轴角速度。 然后，失火探测器通过解释从多个曲轴角速度产生的一系列数据点来确定是否发生了失火。

公开(公告)号：US06978666B1

公开(公告)日：2005-12-27

申请号：US10935871

申请日：2004-09-08

申请人： Zhijian James Wu ,  Min Han ,  Anson Lee

发明人： Zhijian James Wu ,  Min Han ,  Anson Lee

IPC分类号： F02D35/02 ,  F02D41/24 ,  G01M15/00 ,  G01M15/11

CPC分类号： F02D41/1498 ,  F02D41/2432 ,  F02D41/28 ,  F02D2041/281 ,  G01M15/11

摘要： The present invention provides a method and system for systematically calibrating an engine misfire detection system for an internal combustion engine. The present invention provides a method of collecting a plurality of groups of sample data points. Each of the groups of sample data points represents a cylinder firing event. Optionally, misfire events can be induced during the collection of the groups of sample data points. Using the collected data points, a plurality of compensation parameters is then generated and applied iteratively to the sample data points to generally optimize the detection of misfire occurrences. Compensation parameters that produce a high accuracy misfire detection are selected and can be exported from the calibration system to transport to an engine controller in an internal combustion engine. Compensation of edge-to-edge error in engine speed data, engine noise, misfire signal magnitude, and filtering zone boundary coefficients enhance signal quality and further enhance misfire detection.

摘要翻译： 本发明提供一种用于系统地校准用于内燃机的发动机失火检测系统的方法和系统。 本发明提供一种收集多组样本数据点的方法。 样本数据点组中的每一组表示气缸点火事件。 可选地，在收集样本数据组组期间可以引起失火事件。 使用收集的数据点，然后生成多个补偿参数并迭代地应用于样本数据点，以通常优化失火事件的检测。 选择产生高精度失火检测的补偿参数，并可从校准系统输出到内燃机的发动机控制器。 发动机速度数据，发动机噪声，失火信号幅度和过滤区域边界系数的边缘到边缘误差的补偿可提高信号质量，进一步增强失火检测。

公开(公告)号：US06314802B1

公开(公告)日：2001-11-13

申请号：US09361837

申请日：1999-07-27

申请人： Zhijian James Wu ,  Anson Lee

发明人： Zhijian James Wu ,  Anson Lee

IPC分类号： G01M1500

CPC分类号： G01M15/11 ,  F02B2075/184

摘要： The present invention provides a method and system for detecting engine misfire with an optimal compensation of the RPM signal in an internal combustion engine in which the data signal containing a plurality of groups of sample data points is generated. Each of the groups of sample data points represents a cylinder firing event. The data signal is then conditioned for misfire detection processing. The data engine cycle compensation vectors for the RPM zone is then multiplied to the sample data of the RPM. Each group of sample data points is processed using signal processing techniques and then mapped into a single mapped data point. The mapped data points are further processed and then compared to a misfire detection dynamic threshold. A misfire detection signal is then output if any of the mapped data points fall outside the dynamic threshold. The misfire detection system achieves high degree of accuracy through a signal processing and statistical detection technology. The on-line RPM signal compensation reduces the effects to misfire detection caused by the RPM error from various sources and it further enhances the detection performance.

摘要翻译： 本发明提供一种用于在内燃机中对RPM信号进行最佳补偿来检测发动机失火的方法和系统，其中产生包含多组采样数据点的数据信号。 样本数据点组中的每一组表示气缸点火事件。 然后对数据信号进行调节，用于失火检测处理。 然后将RPM区域的数据引擎循环补偿向量乘以RPM的样本数据。 使用信号处理技术处理每组样本数据点，然后映射到单个映射数据点。 映射的数据点被进一步处理，然后与失火检测动态阈值进行比较。 如果任何映射数据点落在动态阈值之外，则输出失火检测信号。 失火检测系统通过信号处理和统计检测技术实现了高精度。 在线RPM信号补偿降低了由各种来源的RPM错误引起的失火检测的影响，进一步提高了检测性能。

公开(公告)号：US6076964A

公开(公告)日：2000-06-20

申请号：US189552

申请日：1998-11-11

申请人： Zhijian James Wu ,  Gang Chen ,  Anson Lee ,  Kerry D. Franks ,  Timothy L. McDonald ,  James R. Tamm

发明人： Zhijian James Wu ,  Gang Chen ,  Anson Lee ,  Kerry D. Franks ,  Timothy L. McDonald ,  James R. Tamm

IPC分类号： G01K7/42 ,  G01K1/12 ,  G01K1/16 ,  G01K1/20 ,  G01K15/00

CPC分类号： H01M10/486 ,  G01K7/42

摘要： A method of determining a vehicle battery temperature by a non-linear dynamic model based on the physical concepts of thermal transfer and a system identification technique. The battery temperature model uses several available physical measurements from the vehicle, including the engine coolant temperature, surrounding air temperature, vehicle speed and the engine fan on/off state. This method also includes the estimation of an initial value of battery temperature before starting the iteration process by the battery temperature prediction from the dynamic model.

摘要翻译： 基于热传递的物理概念和系统识别技术的非线性动力学模型来确定车辆电池温度的方法。 电池温度模型使用来自车辆的几种可用物理测量，包括发动机冷却液温度，周围空气温度，车辆速度和发动机风扇开/关状态。 该方法还包括通过来自动态模型的电池温度预测开始迭代处理之前的电池温度的初始值的估计。

公开(公告)号：US6006155A

公开(公告)日：1999-12-21

申请号：US132872

申请日：1998-08-12

申请人： Zhijian James Wu ,  Anson Lee

发明人： Zhijian James Wu ,  Anson Lee

IPC分类号： F02D41/14 ,  F02D41/34 ,  G01M15/11 ,  F02D41/00

CPC分类号： G01M15/11 ,  F02D41/1498 ,  F02D2041/288 ,  F02D2200/1015 ,  F02D2250/12

摘要： A method and system for detecting engine misfire in an internal combustion engine. A data signal containing a plurality of groups of data points generated from sampling crankshaft rotational displacement over three pre-determined angular sampling windows; is generated. Each of the plurality of groups of sampled data points represents a cylinder firing event. The data signal is conditioned, and the plurality of groups of sampled data points are, mapped into single misfire data points. The mapped single misfire detection points are then compared to a misfire detection dynamic threshold, and a misfire detection signal is output if the misfire detection points fall outside the dynamic threshold. The misfire detection system achieves high degree of accuracy through a multi-stage signal conditioning, multi-rate signal processing and statistical decision technology and a mixed size of window sampling strategy, and is capable of being installed on a large scale in motor vehicles through use of existing on board automotive microcontroller technology.

摘要翻译： 一种用于检测内燃机中发动机失火的方法和系统。 数据信号，包含从三个预定角度采样窗口上取样曲轴旋转位移产生的多组数据点; 被生成。 多组采样数据点中的每一组表示气缸点火事件。 对数据信号进行调节，并将多组采样数据点映射到单个失火数据点。 然后将映射的单个失火检测点与失火检测动态阈值进行比较，并且如果失火检测点落在动态阈值之外，则输出失火检测信号。 失火检测系统通过多级信号调理，多速率信号处理和统计决策技术和窗口采样策略的混合大小实现了高度的准确性，并且能够通过使用大规模安装在机动车辆上 现有车载微控制器技术。

公开(公告)号：US09175582B1

公开(公告)日：2015-11-03

申请号：US14338873

申请日：2014-07-23

申请人： Zhijian James Wu ,  Steven J Gorgas ,  Brian P Gebby ,  Ethan E Bayer ,  Kevin V Rafalo ,  Julian D John ,  Jacob A Kohn

发明人： Zhijian James Wu ,  Steven J Gorgas ,  Brian P Gebby ,  Ethan E Bayer ,  Kevin V Rafalo ,  Julian D John ,  Jacob A Kohn

IPC分类号： F01L1/34 ,  G01M15/04 ,  F02D41/04

CPC分类号： F02D41/0097 ,  F01L13/0015 ,  F01L2800/11 ,  F01L2820/041 ,  F02D41/0002 ,  F02D41/04 ,  F02D41/221 ,  F02D2041/001 ,  F02D2041/228 ,  G01M15/042 ,  Y02T10/42

摘要： An engine system and method for variable valve lift (VVL) diagnostic techniques are provided. In one exemplary implementation, the techniques include receiving, at a controller, a camshaft position signal indicative of detected edges of teeth of a camshaft toothed member that is coupled to a camshaft of an engine. The camshaft is configured to actuate a VVL system, which is configured to control a lift of a valve of the engine. The techniques also include calculating, at the controller, a camshaft speed signal indicative of a rotational speed of the camshaft based on the camshaft position signal. A valve stuck index (VSI) value is then calculated, at the controller, based on the camshaft speed signal. The techniques also include determining, at the controller, whether the valve is stuck based on a comparison of the VSI value to a predetermined threshold.

摘要翻译： 提供了一种用于可变气门升程（VVL）诊断技术的发动机系统和方法。 在一个示例性实施例中，技术包括在控制器处接收指示联接到发动机的凸轮轴的凸轮轴齿形构件的齿的检测到的边缘的凸轮轴位置信号。 凸轮轴构造成致动VVL系统，其被构造成控制发动机的阀的升程。 这些技术还包括在控制器处基于凸轮轴位置信号来计算指示凸轮轴的转速的凸轮轴速度信号。 然后根据凸轮轴转速信号在控制器处计算阀门卡死指数（VSI）值。 这些技术还包括在控制器处基于VSI值与预定阈值的比较来确定阀是否被卡住。

公开(公告)号：US20150167560A1

公开(公告)日：2015-06-18

申请号：US14132913

申请日：2013-12-18

申请人： Zhijian James Wu ,  Brian P. Gebby

发明人： Zhijian James Wu ,  Brian P. Gebby

IPC分类号： F02D13/02

CPC分类号： F02D41/221 ,  F01L13/0015 ,  F01L2800/11 ,  F02D13/0207 ,  F02D2041/001 ,  F02D2041/228 ,  F02D2200/0406 ,  Y02T10/18 ,  Y02T10/40

摘要： A method can include receiving, at a controller for an internal combustion engine, the controller having one or more processors, an intake manifold absolute pressure (MAP) signal indicative of an air pressure in an intake manifold of the engine. The method can include processing, at the controller, the MAP signal in a crank angle domain to obtain distinct portions of the MAP signal corresponding to cylinders of the engine, respectively. The method can include calculating, at the controller, a valve stuck index value based on the distinct portions of the MAP signal. The method can also include detecting, at the controller, one or more stuck valves of the engine based on the valve stuck index value and one or more thresholds.

摘要翻译： 一种方法可包括在用于内燃机的控制器处接收具有一个或多个处理器的控制器，指示发动机的进气歧管中的空气压力的进气歧管绝对压力（MAP）信号。 该方法可以包括在控制器处处理曲柄角域中的MAP信号，以分别获得对应于发动机气缸的MAP信号的不同部分。 该方法可以包括在控制器处基于MAP信号的不同部分计算阀粘滞指数值。 该方法还可以包括在控制器处基于阀卡住的索引值和一个或多个阈值来检测发动机的一个或多个卡止的阀。