公开(公告)号：US12025072B2

公开(公告)日：2024-07-02

申请号：US17917747

申请日：2020-04-08

申请人： NISSAN MOTOR CO., LTD.

发明人： Yuzuru Tohta ,  Kohei Kamiya ,  Noriaki Ejiri ,  Tomoaki Kobayashi

IPC分类号： F02D41/40 ,  F02D41/02 ,  F16H61/14

CPC分类号： F02D41/401 ,  F02D41/0235 ,  F16H61/143 ,  F02D2200/501 ,  F02D2200/60 ,  F16H2061/145

摘要： A control method is provided for controlling an internal combustion engine for a vehicle configured to engage a lockup clutch during a fuel cut, and to decrease a lockup hydraulic pressure at a fuel cut recovery to bring the lockup clutch to a slip engagement. The control method includes estimating a torque of the internal combustion engine generated by the fuel cut recovery when a fuel cut recovery condition is satisfied. The control method further includes decreasing a decrease amount of the lockup hydraulic pressure as the torque is greater.

公开(公告)号：US12013030B1

公开(公告)日：2024-06-18

申请号：US18499819

申请日：2023-11-01

申请人： FCA US LLC

发明人： Nadirsh Patel ,  Andryas Mawardi

IPC分类号： F16H61/14 ,  F16H61/4183 ,  F16H59/46

CPC分类号： F16H61/4183 ,  F16H61/143 ,  F16H2059/467

摘要： Techniques modeling and controlling a torque converter of a vehicle include accessing a look-up table relating (i) various K-factors of a turbine of the torque converter to (ii) various K-factors of an impeller of the torque converter, speed ratios of the torque converter, and torque ratios of the torque converter, calculating a K-factor of the turbine based on the set of parameters, determining a speed ratio and a torque ratio of the torque converter based on the calculated turbine K-factor using the look-up table, determining a target speed and a target torque for the impeller based on the determined speed and torque ratios of the torque converter, and controlling a torque generating system including the torque converter to achieve the target impeller speed and torque to thereby achieve the torque request at a driveline and mitigate or eliminate noise/vibration/harshness (NVH).

公开(公告)号：US11976724B2

公开(公告)日：2024-05-07

申请号：US18546622

申请日：2022-02-15

申请人： JATCO Ltd ,  NISSAN MOTOR CO., LTD.

发明人： Seiichirou Takahashi ,  Koji Saito

IPC分类号： F16H61/662 ,  F16H61/14 ,  F16H61/66

CPC分类号： F16H61/66259 ,  F16H61/143 ,  F16H2061/145 ,  F16H2061/661

摘要： [PROBLEMS] When an acceleration request from a driver is large, upshift is performed under a high engine rotation speed.
[SOLUTIONS] Provided is an automatic transmission, including: a torque converter that is disposed downstream of a drive source in a power transmission path and is provided with a lockup clutch; and a transmission mechanism that is disposed downstream of the torque converter and changes a speed ratio between an input shaft and an output shaft, in which in a state where the lockup clutch is engaged, when a rotation speed of the input shaft reaches a first rotation speed, the automatic transmission starts upshift, and in a state where the lockup clutch is disengaged or slips, when the rotation speed of the input shaft reaches a second rotation speed obtained by subtracting a first predetermined rotation speed from the first rotation speed, the automatic transmission starts upshift, and the first predetermined rotation speed decreases as an output torque of the drive source increases.

公开(公告)号：US20240125092A1

公开(公告)日：2024-04-18

申请号：US17965939

申请日：2022-10-14

申请人： Caterpillar Inc.

发明人： Brian E. Lister ,  Michael D. Beyer

IPC分类号： E02F9/20 ,  B60L15/20 ,  B60L53/20 ,  F16H61/14

CPC分类号： E02F9/207 ,  B60L15/20 ,  B60L53/20 ,  E02F9/2079 ,  F16H61/14

摘要： An electric powertrain includes an electric power source, an electric motor and a multi-speed transmission. The powertrain has an electronic controller. The controller determines a respective rimpull torque limit for the operating gear of the multi-speed transmission and determines whether the rimpull torque demand exceeds the rimpull torque limit. Upon determining that the rimpull torque demand exceeds the rimpull torque limit, the controller acts to either (i) shift the multi-speed transmission to a gear in which the respective rimpull torque limit is at or above the rimpull torque demand or (ii) reduce the electric motor torque command to a level for which the rimpull torque is below the respective rimpull torque limit for the operating gear of the multi-speed transmission.

公开(公告)号：US11732797B2

公开(公告)日：2023-08-22

申请号：US17838451

申请日：2022-06-13

申请人： Eaton Cummins Automated Transmission Technologies, LLC

发明人： Thomas Connolly ,  Joseph Paul Furner ,  Sipei Chen ,  Jeff Hawarden ,  Ian Daniel McKenzie ,  Christopher DeBoer

IPC分类号： B60W10/02 ,  F16H61/04 ,  F16H59/02 ,  F16H37/04 ,  G08B13/00 ,  G08B27/00 ,  F16H3/64 ,  F16H57/02 ,  F16H61/06 ,  F16H61/08 ,  H04B10/077 ,  H04J3/12 ,  B60W10/11 ,  B60W30/19 ,  B60W50/00 ,  F16D25/12 ,  F16H3/091 ,  F16H61/00 ,  F16H61/02 ,  F16H57/021 ,  F16H57/04 ,  F16H63/00 ,  F16H59/72 ,  F16H63/24 ,  F16H61/30 ,  F16H57/032 ,  F16H61/28 ,  F16H63/30 ,  F16H61/682 ,  F16H3/16 ,  F16H3/78 ,  F16H59/40 ,  F16H61/14 ,  F16H61/70 ,  F16H59/38

CPC分类号： F16H59/0204 ,  B60W10/02 ,  B60W10/11 ,  B60W30/19 ,  B60W50/00 ,  F16D25/126 ,  F16H3/091 ,  F16H3/64 ,  F16H37/046 ,  F16H57/02004 ,  F16H61/0021 ,  F16H61/0213 ,  F16H61/06 ,  F16H61/08 ,  G08B13/00 ,  G08B27/00 ,  H04B10/0775 ,  H04J3/125 ,  B60W2050/0058 ,  B60W2510/0275 ,  B60W2510/0283 ,  B60W2510/107 ,  B60W2710/021 ,  B60W2710/022 ,  B60W2710/025 ,  B60W2710/1005 ,  F16H3/16 ,  F16H3/78 ,  F16H57/021 ,  F16H57/032 ,  F16H57/043 ,  F16H57/0423 ,  F16H57/0441 ,  F16H57/0471 ,  F16H57/0478 ,  F16H57/0484 ,  F16H57/0494 ,  F16H59/38 ,  F16H59/40 ,  F16H59/72 ,  F16H61/04 ,  F16H61/143 ,  F16H61/682 ,  F16H61/705 ,  F16H63/24 ,  F16H2057/0206 ,  F16H2059/725 ,  F16H2061/2853 ,  F16H2061/308 ,  F16H2063/005 ,  F16H2063/3093

摘要： A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.

公开(公告)号：US20230235817A1

公开(公告)日：2023-07-27

申请号：US18158123

申请日：2023-01-23

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Aisin Corporation

发明人： Masahide Ichikawa ,  Kazumitsu Sugano ,  Shunsuke Yanagi ,  Yuji Imanaga ,  Yui Goto ,  Masatsugu Yoshimoto

IPC分类号： F16H61/14

CPC分类号： F16H61/143 ,  F16H2061/145

摘要： A control apparatus for a vehicle provided with (i) a power source, (ii) drive wheels and (iii) a fluid transmission device disposed between the power source and the drive wheels and including a lockup clutch to which a fluid pressure is supplied. A feedback control is executed for correcting a command value of the fluid pressure by a correction amount such that an actual value of a slip amount of the lockup clutch becomes substantially equal to the target value of the slip amount in a slip control. When the actual value has been converged into a given range with respect to the target value, the correction amount is obtained, and the command value for a next execution of the slip control is corrected by learning with use of the obtained correction amount. The given range is set depending on the target value of the slip amount.

公开(公告)号：US20230167889A1

公开(公告)日：2023-06-01

申请号：US17562148

申请日：2021-12-27

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Dongxu Li ,  Chengwu Duan ,  Norman K. Bucknor ,  Chunhao J. Lee ,  Lei Hao

IPC分类号： F16H45/02 ,  F16H61/14 ,  F16H41/22

CPC分类号： F16H45/02 ,  F16H61/143 ,  F16H41/22 ,  F16H2045/0284 ,  F16H2041/246

摘要： A system for bypassing a torque converter in a powertrain is provided. The system includes a torque generating device including an output shaft and a transmission assembly. The transmission assembly includes a transmission output shaft and a torque converter, a torque converter bypass shaft. The transmission assembly further includes a disconnect clutch selectively coupling the torque converter with the torque generating device and a torque converter clutch selectively coupling the torque converter bypass shaft with the torque generating device. Engaging the disconnect clutch and disengaging the torque converter clutch enables the torque generating device to transmit torque to the transmission output shaft through the torque converter. Engaging the torque converter clutch and disengaging the disconnect clutch enables the torque generating device to transmit torque to the transmission output shaft through the torque converter bypass shaft.

公开(公告)号：US11603925B1

公开(公告)日：2023-03-14

申请号：US17560560

申请日：2021-12-23

申请人： GM GLOBAL TECHNOLOGY OPERATIONS LLC

发明人： Chunhao J. Lee ,  Norman K. Bucknor ,  Dongxu Li ,  Chengwu Duan ,  Lei Hao

IPC分类号： F16H45/02 ,  F16H61/14 ,  F16H61/00

摘要： Presented are clutch control systems for torque converter (TC) assemblies, methods for making/operating such TC assemblies, and vehicles equipped with such TC assemblies. A TC assembly includes a housing that drivingly connects to an electric motor, and an output member that drivingly connects to a multi-gear transmission. Rotatable within the TC housing are a turbine attached to the TC output member and an impeller juxtaposed with the turbine. A lockup clutch is operable to lock the housing to the output member. A system controller is programmed to receive a shift signal to shift the powertrain from a neutral or park operating mode to a forward driving operating mode; responsive to receipt of this shift signal, the lockup clutch is opened. The system controller then receives a TCC lock signal to lock the lockup clutch; responsive to receipt of the TCC lock signal, the lockup clutch is closed.

公开(公告)号：US20230046052A1

公开(公告)日：2023-02-16

申请号：US17816458

申请日：2022-08-01

申请人： ZF Friedrichshafen AG

发明人： Christoph Hess ,  Jörg Arnold ,  Jens Weller

IPC分类号： F16H61/14 ,  F16D48/06 ,  F16H59/40 ,  F16H59/44 ,  F16H59/46 ,  F16H59/70

摘要： The invention relates to the actuation of a converter lock-up clutch (44) of a hydrodynamic torque converter (4) in a vehicle drive-train by means of a safety function where, in addition to a driving strategy function, the safety function can actuate the converter lock-up clutch (44) by issuing a clutch actuation command. For this purpose, at least one rotation speed at the torque converter (4) is monitored. If the monitored rotation speed is below a rotation speed threshold, the safety function commands an actuation of the converter lock-up clutch (44) in its opening direction.

公开(公告)号：US11572053B1

公开(公告)日：2023-02-07

申请号：US17865100

申请日：2022-07-14

申请人： Hyundai Motor Company ,  Kia Corporation

发明人： Jin Young Hwang

IPC分类号： B60W10/06 ,  F16H59/44 ,  F16H59/46 ,  F16H59/48 ,  F16H61/14 ,  F02D41/02 ,  B60W10/107 ,  B60W10/02 ,  F16H61/662

摘要： A method for controlling a vehicle including a continuously variable transmission includes determining, by a controller, whether a speed difference between a speed of a vehicle according to revolutions per minute (RPM) of a driving wheel of the vehicle and a speed of the vehicle according to revolutions per minute (RPM) of a towed wheel of the vehicle is equal to or greater than a speed reference value and reducing, by the controller, torque of an engine providing a driving force to a driving pulley of the continuously variable transmission when the difference in vehicle speed is equal to or greater than the speed reference value.