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.

公开(公告)号：US10030722B2

公开(公告)日：2018-07-24

申请号：US15345566

申请日：2016-11-08

Applicant: GM Global Technology Operations LLC

Inventor： Roberto Diaz ,  David C. Webert ,  Patrick M. Gibson

IPC: F16D48/06 ,  F16D41/12

CPC classification number: F16D48/06 ,  F16D41/125 ,  F16D2500/10412 ,  F16D2500/10493 ,  F16D2500/1085 ,  F16D2500/30406 ,  F16D2500/30415 ,  F16D2500/3065 ,  F16D2500/30814 ,  F16D2500/3166 ,  F16D2500/502 ,  F16D2500/70408 ,  F16D2500/70426 ,  F16D2500/7082 ,  F16D2500/7108

Abstract: A system for determining when a selectable one-way clutch has mechanically released includes an update timer identifying if each of a converter model engine torque, a transmission input torque, and a torque converter slip are positive for a predetermined period of time. An SOWC slip value is calculated using an output signal from each of: at least one transmission internal speed sensor producing an output signal representative of a speed of an internal component of a transmission; and at least one transmission output speed sensor producing an output signal representative of a speed of an output of the transmission. An SOWC released signal is issued if either all of the measured converter model engine torque, the measured transmission input torque, and the measured torque converter slip are positive for at least the predetermined period of time, or the calculated SOWC slip value is greater than a predetermined threshold.

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.

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.

公开(公告)号：US20180128328A1

公开(公告)日：2018-05-10

申请号：US15345566

申请日：2016-11-08

Applicant: GM Global Technology Operations LLC

Inventor： Roberto Diaz ,  David C. Webert ,  Patrick M. Gibson

IPC: F16D48/06 ,  F16D41/12

CPC classification number: F16D48/06 ,  F16D41/125 ,  F16D2500/10412 ,  F16D2500/10493 ,  F16D2500/30406 ,  F16D2500/3065 ,  F16D2500/30814 ,  F16D2500/502 ,  F16D2500/7082 ,  F16D2500/7108

Abstract: A system for determining when a selectable one-way clutch has mechanically released includes an update timer identifying if each of a converter model engine torque, a transmission input torque, and a torque converter slip are positive for a predetermined period of time. An SOWC slip value is calculated using an output signal from each of: at least one transmission internal speed sensor producing an output signal representative of a speed of an internal component of a transmission; and at least one transmission output speed sensor producing an output signal representative of a speed of an output of the transmission. An SOWC released signal is issued if either all of the measured converter model engine torque, the measured transmission input torque, and the measured torque converter slip are positive for at least the predetermined period of time, or the calculated SOWC slip value is greater than a predetermined threshold.

公开(公告)号：US20170159815A1

公开(公告)日：2017-06-08

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: F16H61/688 ,  F16H61/02

CPC classification number: F16H61/686 ,  B60Y2400/427 ,  F16H61/0213 ,  F16H61/061 ,  F16H61/21 ,  F16H2061/0237 ,  F16H2061/0462 ,  F16H2061/0496 ,  F16H2200/0065 ,  F16H2200/2079 ,  F16H2200/2084

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.