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    Acoustic fluid analysis method
    12.
    发明授权
    Acoustic fluid analysis method 有权
    声流分析法

    公开(公告)号：US07614302B2

    公开(公告)日：2009-11-10

    申请号：US11638893

    申请日：2006-12-14

    申请人： Rocco DiFoggio ,  Paul A. Bergren ,  Jun Han

    发明人： Rocco DiFoggio ,  Paul A. Bergren ,  Jun Han

    IPC分类号： G01N29/04 ,  G01N29/50

    CPC分类号： E21B49/10 ,  G01N29/024 ,  G01N29/032 ,  G01N29/222 ,  G01N2291/02433

    摘要： A method of analyzing acoustic data, that includes determining fluid sound speed through connate fluid. The method involves sampling the fluid, sending an acoustic signal into the fluid between a first and a second reflective interface. Data is recorded that represents acoustic signals over time as they are reflecting from the interfaces. A smoothed first derivative with respect to time of the cumulative sum of squares (CSS) of the filtered amplitude data is determined. This first derivative is cross correlated to the time-shifted versions of itself.

    摘要翻译： 一种分析声学数据的方法，包括通过合成流体确定流体声速。 该方法包括对流体进行取样，将声信号发送到第一和第二反射界面之间的流体中。 记录数据，其随着时间的推移表示声信号，因为它们是从接口反射的。 确定相对于经滤波的振幅数据的累积平方和（CSS）的时间的平滑的一阶导数。 这个一阶导数与其本身的时移版本是交叉相关的。

    Method of determining cam phase angle
    14.
    发明授权
    Method of determining cam phase angle 失效

    公开(公告)号：US06612162B2

    公开(公告)日：2003-09-02

    申请号：US09725443

    申请日：2000-11-29

    申请人： Jun Han ,  Dennis C. Reed ,  Louis J. Baumgartner

    发明人： Jun Han ,  Dennis C. Reed ,  Louis J. Baumgartner

    IPC分类号： G01M1500

    CPC分类号： G01M15/06

    摘要： A method of determining the phase angle of an internal combustion engine camshaft relative to a crankshaft of the engine, which significantly reduces the computational burden compared to conventional methods. The cam and crankshaft position pulses are identified by corresponding clock values, and the cam phase angle relative to the crankshaft is determined by computing a simple ratio of first and second time intervals based on the clock values, and multiplying the ratio by a known angle. One of the time intervals is defined by a time difference between successive crankshaft and camshaft pulses, while the other time interval is defined by a time difference between successive crankshaft pulses. The known angle is the angle of crankshaft rotation between the successive crankshaft pulses. The cam phase angle velocity is obtained by determining a change in cam phase angle, and dividing by the intervening time interval.

    MULTI-PHASE ENGINE STOP POSITION CONTROL
    17.
    发明申请
    MULTI-PHASE ENGINE STOP POSITION CONTROL 有权
    多相发动机停止位置控制

    公开(公告)号：US20110253099A1

    公开(公告)日：2011-10-20

    申请号：US12759898

    申请日：2010-04-14

    申请人： Jun Han ,  Lan Wang ,  Goro Tamai

    发明人： Jun Han ,  Lan Wang ,  Goro Tamai

    IPC分类号： F02D41/00

    CPC分类号： F02N11/0818 ,  F02D41/0097 ,  F02D41/042 ,  F02D41/065 ,  F02D2041/0095 ,  F02D2200/101 ,  F02N11/0814 ,  F02N19/005 ,  F02N2019/008

    摘要： A method is provided for controlling engine stop position in a vehicle having an engine with auto stop/auto start functionality. The method includes automatically ramping down engine speed upon initiation of an auto stop event, executing closed-loop speed control of the engine when the engine speed begins to ramp down, and for as long as the engine speed remains above a threshold engine speed while ramping down the engine speed; executing closed-loop position control of the engine while ramping down the engine speed once the engine speed is less than the threshold engine speed and greater than zero; and stopping the crankshaft to within a calibrated range of a targeted engine stop position. A controller is also provided that includes a hardware module and an algorithm adapted for executing the foregoing method, and a vehicle is provided having an engine with auto stop/start functionality and the controller noted above.

    摘要翻译： 提供一种用于控制具有自动停止/自动启动功能的发动机的车辆中的发动机停止位置的方法。 该方法包括在发动自动停止事件时自动降低发动机转速，当发动机转速开始下降时执行发动机的闭环速度控制，并且只要发动机转速保持高于发动机转速的阈值，同时斜坡 降低发动机转速; 一旦发动机转速小于发动机转速的阈值并大于零，则执行发动机的闭环位置控制，同时降低发动机转速; 并将曲轴停止在目标发动机停止位置的校准范围内。 还提供了一种包括硬件模块和适于执行上述方法的算法的控制器，并且提供了一种具有自动停止/起动功能的发动机和上述控制器的车辆。