公开(公告)号：US20130268177A1

公开(公告)日：2013-10-10

申请号：US13440126

申请日：2012-04-05

申请人： Zhijian James Wu ,  Paula M. Reeber-Schmanski ,  Richard A. Kulas ,  Jay C. McCombie ,  Gregory L. Ohl

发明人： Zhijian James Wu ,  Paula M. Reeber-Schmanski ,  Richard A. Kulas ,  Jay C. McCombie ,  Gregory L. Ohl

IPC分类号： G01M15/04 ,  F02D41/00

CPC分类号： F02D41/1458 ,  F02D41/0085 ,  F02D41/1439 ,  F02D41/1454 ,  F02D2041/1432 ,  F02D2250/14

摘要： A method of estimating the individual fuel air ratio richness of an individual cylinder in an engine by utilizing a single oxygen sensor at the confluence of a plurality of exhaust runners. The method provides for the use of a wide range or switching oxygen sensor at the confluence of a plurality of exhaust runners.

摘要翻译： 一种通过在多个排气流道的汇合处利用单个氧传感器来估计发动机中各个气缸的单独燃料空气比浓度的方法。 该方法提供在多个排气流道的汇合处使用宽范围或切换氧传感器。

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：US06902319B2

公开(公告)日：2005-06-07

申请号：US10754062

申请日：2004-01-08

申请人： Zhijian James Wu ,  Jyh-Laing L. Lin ,  Dean Marshall ,  Brad Schoeff ,  Michel Trumbo ,  John G Hatfield ,  James Karlet ,  Yijun Tu

发明人： Zhijian James Wu ,  Jyh-Laing L. Lin ,  Dean Marshall ,  Brad Schoeff ,  Michel Trumbo ,  John G Hatfield ,  James Karlet ,  Yijun Tu

IPC分类号： G01K7/42 ,  G01K17/20 ,  H02J7/14 ,  G01K3/02

CPC分类号： G01K7/42 ,  G01K17/20

摘要： A method of estimating an internal temperature of a vehicle battery is based on heat transfer between a heat source and the battery. In addition to the heat source, airflow generated by vehicle movement and radiator fans affects the internal temperature of the battery. The method estimates an initial internal temperature of the battery at engine startup based on how long the engine was off. The temperature of the heat source is determined. A transfer function is determined to represent the effect of the airflow. The method updates a current internal temperature of the battery based on the initial internal temperature and an integration of the transfer function and the heat source temperature.

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。