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    METHOD AND APPARATUS FOR MONITORING A MACHINE BEARING ON-VEHICLE
    11.
    发明申请
    METHOD AND APPARATUS FOR MONITORING A MACHINE BEARING ON-VEHICLE 审中-公开

    公开(公告)号：US20200149993A1

    公开(公告)日：2020-05-14

    申请号：US16189084

    申请日：2018-11-13

    Applicant: GM Global Technology Operations LLC

    Inventor： Jianshe Feng ,  Xinyu Du ,  Mutasim Salman ,  Kevin A. Cansiani

    IPC: G01M13/045

    Abstract: A machine bearing disposed on a rotatable member, such as may be present on a vehicle, is described. A method for monitoring a state of health of the machine bearing includes monitoring, via a microphone, an acoustic signal, and coincidently determining a rotational speed of the rotatable member associated with the machine bearing. The sound spectrum is correlated to the rotational speed of the rotating member, and a time-frequency analysis is executed to determine a sound spectrum. The sound spectrum is transformed to a residual spectrum. A first feature associated with a first frequency band and a second feature associated with a second frequency band are extracted from the residual spectrum. The state of health associated with the machine bearing is detected based upon the first and second features, and is communicated to a second controller.

    SYSTEM AND METHOD OF PREDICTIVE FAULT MITIGATION FOR ELECTRIC POWER STEERING SYSTEM IN A VEHICLE
    13.
    发明申请
    SYSTEM AND METHOD OF PREDICTIVE FAULT MITIGATION FOR ELECTRIC POWER STEERING SYSTEM IN A VEHICLE 审中-公开

    公开(公告)号：US20200023891A1

    公开(公告)日：2020-01-23

    申请号：US16037669

    申请日：2018-07-17

    Applicant: GM Global Technology Operations LLC

    Inventor： Wen-Chiao Lin ,  Xinyu Du ,  Brian N. Siskoy

    IPC: B62D5/04 ,  G05D1/00 ,  G05D1/02 ,  G07C5/00 ,  G07C5/08

    Abstract: A method of controlling a vehicle having an electric power steering system includes generating a plurality of possible routes. Each of the plurality of possible routes that require a steering torque that is within an available torque range is identified as a system compliant route. Each of the plurality of possible routes that require an angular position of an electric motor of the electric power steering system at all time indices throughout that route that are within an available motor position range are also identified as a system compliant route. One of the identified system compliant routes is selected based on at least one selection criteria, and designated as an active route. The electric power steering system is then controlled to maneuver the vehicle along the active route. The electric power steering system is monitored as the vehicle moves along the active route to identify degradation of its capabilities.

    NO-START DIAGNOSTICS FOR POWERTRAIN WITH ENABLED STARTER
    16.
    发明申请
    NO-START DIAGNOSTICS FOR POWERTRAIN WITH ENABLED STARTER 审中-公开

    公开(公告)号：US20180058413A1

    公开(公告)日：2018-03-01

    申请号：US15250251

    申请日：2016-08-29

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Shengbing Jiang ,  Xinyu Du

    IPC: F02N11/10

    CPC classification number: F02N11/108 ,  F02N2200/022 ,  F02N2200/043 ,  F02N2200/044 ,  F02N2200/062 ,  F02N2200/0802

    Abstract: A method diagnoses a no-start condition in a powertrain having an engine and a starter system operable for starting the engine. The starter system includes a battery, solenoid relay, starter solenoid, and starter motor. The method includes recording starter data over a calibrated sampling duration in response to a requested start event when the solenoid relay is enabled, including a cranking voltage and engine speed. If no battery current sensor is used, the method derives a resistance ratio using an open-circuit voltage and a minimum cranking voltage of the battery. When such a sensor is used, the method derives a battery and starter resistance. A fault mode of the starter system is then identified via a controller using the starter data and either the resistance ratio or the battery and starter resistances. A control action executes that corresponds to the identified fault mode.

    DETECTION OF ECU GROUND FAULT WITH CAN BUS VOLTAGE MEASUREMENTS
    17.
    发明申请
    DETECTION OF ECU GROUND FAULT WITH CAN BUS VOLTAGE MEASUREMENTS 有权
    用CAN总线电压测量检测ECU接地故障

    公开(公告)号：US20160320441A1

    公开(公告)日：2016-11-03

    申请号：US14837641

    申请日：2015-08-27

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Xinyu Du ,  Shengbing Jiang ,  Atul Nagose ,  David B. Gumpert ,  Aaron B. Bloom ,  Rod Niner

    IPC: G01R31/08 ,  G01R31/02

    CPC classification number: G01R31/025 ,  G01R31/007 ,  H04L1/24

    Abstract: A method is disclosed for detecting ground faults in a communications system. The method includes measuring a predetermined number of voltage points; determining if the measured voltage points represent recessive or dominant bits; identifying which of the predetermined number of voltage points represent inter-frame bits and which represent frame data bits based on whether the measured voltage points are recessive or dominant; calculating a maximum average voltage for the inter-frame bits; calculating an average frame voltage for all dominant bits within a frame; determining a high average dominant voltage count based on a number of frames for which the average frame voltage is greater than a high voltage threshold; and determining if a ground fault exists based on the average frame voltage and the high average dominant voltage count.

    Abstract translation: 公开了一种用于检测通信系统中的接地故障的方法。 该方法包括测量预定数量的电压点; 确定测量的电压点是否表示隐性或显性位; 识别预定数量的电压点中的哪一个代表帧间比特，并且基于所测量的电压点是否为隐性或占优势来表示帧数据比特; 计算帧间比特的最大平均电压; 计算帧内所有显性位的平均帧电压; 基于平均帧电压大于高电压阈值的帧数确定高平均主电压计数; 并且基于平均帧电压和高平均主电压计数来确定是否存在接地故障。

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