公开(公告)号：US20140316641A1

公开(公告)日：2014-10-23

申请号：US13865384

申请日：2013-04-18

申请人： Zhijian James Wu ,  Andrew P. Bagnasco

发明人： Zhijian James Wu ,  Andrew P. Bagnasco

IPC分类号： F02D23/00

CPC分类号： F02D23/005 ,  F02B39/04 ,  F02B77/081 ,  F02D23/02 ,  F02D41/0007 ,  F02D2041/288 ,  F02D2200/0406 ,  F02D2250/14

摘要： A technique can include receiving, at a controller for a vehicle, the controller including one or more processors, a signal indicative of a pressure in an intake manifold of an engine of the vehicle. The vehicle can include a supercharger configured to supply pressurized air to the intake manifold. The supercharger can be driven by a crankshaft of the engine via a belt. The technique can include estimating, at the controller, a frequency of the signal to obtain an estimated frequency. The technique can include determining, at the controller, whether the belt is slipping based on a comparison between the estimated frequency and a predetermined frequency. The technique can also include outputting, at the controller, a notification when the belt is determined to be slipping.

摘要翻译： 技术可以包括在车辆的控制器处接收包括一个或多个处理器的控制器，指示车辆发动机的进气歧管中的压力的​​信号。 车辆可以包括配置成向进气歧管供应加压空气的增压器。 增压器可以由发动机的曲轴通过皮带驱动。 该技术可以包括在控制器处估计信号的频率以获得估计的频率。 该技术可以包括在控制器处基于估计频率和预定频率之间的比较确定皮带是否滑动。 该技术还可以包括当控制器确定滑动时在控制器处输出通知。

公开(公告)号：US08903598B2

公开(公告)日：2014-12-02

申请号：US13865384

申请日：2013-04-18

申请人： Zhijian James Wu ,  Andrew P. Bagnasco

发明人： Zhijian James Wu ,  Andrew P. Bagnasco

IPC分类号： G01M17/00 ,  F02D23/00 ,  F02D23/02

CPC分类号： F02D23/005 ,  F02B39/04 ,  F02B77/081 ,  F02D23/02 ,  F02D41/0007 ,  F02D2041/288 ,  F02D2200/0406 ,  F02D2250/14

摘要： A technique can include receiving, at a controller for a vehicle, the controller including one or more processors, a signal indicative of a pressure in an intake manifold of an engine of the vehicle. The vehicle can include a supercharger configured to supply pressurized air to the intake manifold. The supercharger can be driven by a crankshaft of the engine via a belt. The technique can include estimating, at the controller, a frequency of the signal to obtain an estimated frequency. The technique can include determining, at the controller, whether the belt is slipping based on a comparison between the estimated frequency and a predetermined frequency. The technique can also include outputting, at the controller, a notification when the belt is determined to be slipping.

摘要翻译： 技术可以包括在车辆的控制器处接收包括一个或多个处理器的控制器，指示车辆发动机的进气歧管中的压力的​​信号。 车辆可以包括配置成向进气歧管供应加压空气的增压器。 增压器可以由发动机的曲轴通过皮带驱动。 该技术可以包括在控制器处估计信号的频率以获得估计的频率。 该技术可以包括在控制器处基于估计频率和预定频率之间的比较确定皮带是否滑动。 该技术还可以包括当控制器确定滑动时在控制器处输出通知。

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。

公开(公告)号：US5744722A

公开(公告)日：1998-04-28

申请号：US719304

申请日：1996-09-16

申请人： Zhijian James Wu ,  John Fiaschetti

发明人： Zhijian James Wu ,  John Fiaschetti

IPC分类号： G01P3/48 ,  G01H11/08 ,  G01H13/00

CPC分类号： G01P3/48

摘要： The present invention provides a system for detecting and removing resonance from crankshaft speed measurements comprising signal demodulation and deconvolution processing. According to the invention, a crankshaft speed sensor sends an appropriate signal corresponding to crankshaft speed to an engine controller. The input signal with resonance noise is subjected to a demodulation operation in N demodulation subsystems for resonance detection and identification. Also, the input signal with resonance noise is subjected to a deconvolution operation in N deconvolution subsystems for resonance noise removal. The demodulated signals are compared to a given set of criteria for selecting a desired signal subsystem. The desired demodulated signal subsystem is then used to screen the deconvolved signal so that only a matching deconvolved signal exits the system as the system output. Accordingly, the signal from a deconvolved signal subsystem matching the selected demodulated signal subsystem is selected as the system output. By properly identifying the desired signal subsystem during demodulation and suppressing resonance noise during deconvolution, the system output signal has an enhanced signal-to-noise ratio. Hence, the output signal is better suited for further processing, such as engine misfire detection, than according to the prior art.

摘要翻译： 本发明提供了一种用于从包括信号解调和去卷积处理的曲轴速度测量中检测和去除谐振的系统。 根据本发明，曲轴速度传感器将对应于曲轴速度的适当信号发送到发动机控制器。 具有谐振噪声的输入信号在N个解调子系统中进行解调操作，用于谐振检测和识别。 此外，具有谐振噪声的输入信号在N个去卷积子系统中进行去卷积运算，用于谐振噪声去除。 将解调的信号与用于选择期望的信号子系统的给定的一组标准进行比较。 然后使用所需的解调信号子系统来屏蔽解卷积信号，使得只有匹配的去卷积信号作为系统输出退出系统。 因此，选择与选择的解调信号子系统相匹配的解卷积信号子系统的信号作为系统输出。 通过在解调过程中正确识别期望的信号子系统并且在去卷积期间抑制谐振噪声，系统输出信号具有增强的信噪比。 因此，与现有技术相比，输出信号更适合进一步处理，例如发动机失火检测。

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：US20140095089A1

公开(公告)日：2014-04-03

申请号：US13633470

申请日：2012-10-02

申请人： Zhijian James Wu ,  Brian P. Gebby

发明人： Zhijian James Wu ,  Brian P. Gebby

IPC分类号： G01R31/36 ,  G06F19/00

CPC分类号： G01R31/3842 ,  G01R31/3648 ,  G01R31/3828 ,  G01R31/3835 ,  G01R35/00

摘要： A method for diagnosing an estimated battery state of charge is provided. The method includes estimating a first state of charge of a battery at a first time with a state-of-charge sensor, estimating a second state of charge of the battery at the first time, calculating a difference between the first state of charge and the second state of charge, and comparing the difference between the first state of charge and the second state of charge to a predetermined value to determine whether the battery sensor is within operating parameters. A system for estimating battery state of charge is further provided. The system includes a state-of-charge sensor configured to estimate a first state of charge of a battery at a first time, and a processor connected to the battery sensor and configured to estimate a second state of charge of the battery at the first time, and compare a difference between the first state of charge to the second state of charge to a predetermined value to determine whether the battery sensor is within operating parameters.

摘要翻译： 提供了一种用于诊断估计的电池充电状态的方法。 该方法包括：利用充电状态传感器在第一时间估计电池的第一充电状态，在第一时间估计电池的第二充电状态，计算第一充电状态和 第二充电状态，并将第一充电状态和第二充电状态之间的差作为预定值进行比较，以确定电池传感器是否在操作参数内。 还提供了一种用于估计电池充电状态的系统。 该系统包括被配置为在第一时间估计电池的第一充电状态的充电状态传感器和连接到电池传感器并被配置为在第一时间估计电池的第二充电状态的处理器 ，并将第一充电状态与第二充电状态之间的差值比较为预定值，以确定电池传感器是否在操作参数内。

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。