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    PRE-REMEDIAL FAULT CONTROL IN A TRANSMISSION
    1.
    发明申请
    PRE-REMEDIAL FAULT CONTROL IN A TRANSMISSION 审中-公开

    公开(公告)号：US20170276238A1

    公开(公告)日：2017-09-28

    申请号：US15077241

    申请日：2016-03-22

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Ronald F. Lochocki, JR. ,  Scott D. Biggs ,  Moussa Ndiaye ,  Patrick M. Gibson ,  Brian W. Hanselman

    IPC: F16H61/12

    CPC classification number: F16H61/12 ,  F16H61/686 ,  F16H2061/1232

    Abstract: A vehicle includes a prime mover, transmission, drive axle, and controller. The controller identifies clutches involved in establishing or maintaining a requested gear state, and detects an impending fault condition of the transmission. The controller also executes a pre-remedial control action in response to the impending fault condition, and places the transmission in a hydraulic default mode when the remedial control action does not clear the fault condition after a calibrated duration. A system includes the transmission and controller. A method for providing pre-remedial control of a transmission includes identifying clutches of the transmission that are involved in establishing or maintaining a requested gear state, and detecting an impending fault condition. The method further includes executing a pre-remedial control action in response to the impending fault condition and placing the transmission in a hydraulic default mode if the remedial control action does not clear the fault condition.

    Transmission with L1-L2 shift method while engine braking
    3.
    发明授权
    Transmission with L1-L2 shift method while engine braking 有权

    公开(公告)号：US10113639B2

    公开(公告)日：2018-10-30

    申请号：US14959258

    申请日：2015-12-04

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Scott A. Kline ,  Patrick M. Gibson ,  Raj Kommareddy ,  Roberto Diaz

    IPC: F16H61/686 ,  F16H61/02 ,  F16H61/06 ,  F16H61/21 ,  F16H61/04

    Abstract: A transmission includes a stationary member, an input member, and gear sets each having a plurality of nodes. The transmission includes a first clutch that connects a node of one gear set to the stationary member to establish an L1 mode, and a second clutch that connects a node of another gear set to the stationary member to establish a 2L mode. A SOWC is connected between nodes of two gear sets, and a controller, in response to a requested shift L1-L2 shift while engine braking, executes a method to release the first clutch and thereby enters a neutral mode. The SOWC is released when slip across the first clutch exceeds a first threshold, then the first clutch reapplied when a SOWC slip level exceeds another threshold to thereby enter a 1st gear freewheeling mode. The second clutch is reapplied to enter the L2 mode and resume engine braking.

    Pre-remedial fault control in a transmission
    4.
    发明授权
    Pre-remedial fault control in a transmission 有权

    公开(公告)号：US10030765B2

    公开(公告)日：2018-07-24

    申请号：US15077241

    申请日：2016-03-22

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Ronald F. Lochocki, Jr. ,  Scott D. Biggs ,  Moussa Ndiaye ,  Patrick M. Gibson ,  Brian W. Hanselman

    IPC: F16H61/12 ,  F16H61/686

    Abstract: A vehicle includes a prime mover, transmission, drive axle, and controller. The controller identifies clutches involved in establishing or maintaining a requested gear state, and detects an impending fault condition of the transmission. The controller also executes a pre-remedial control action in response to the impending fault condition, and places the transmission in a hydraulic default mode when the remedial control action does not clear the fault condition after a calibrated duration. A system includes the transmission and controller. A method for providing pre-remedial control of a transmission includes identifying clutches of the transmission that are involved in establishing or maintaining a requested gear state, and detecting an impending fault condition. The method further includes executing a pre-remedial control action in response to the impending fault condition and placing the transmission in a hydraulic default mode if the remedial control action does not clear the fault condition.

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