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：US12078118B2

公开(公告)日：2024-09-03

申请号：US18262202

申请日：2021-11-29

申请人： Nissan Motor Co., Ltd. ,  JATCO LTD

发明人： Tetsuya Nishiyama ,  Daigo Kishi ,  Tatsuo Nakano ,  Seiichirou Takahashi ,  Koji Saito ,  Yukiyoshi Inuta ,  Takao Arimatsu ,  Yasuhiro Endo

IPC分类号： F02D41/02 ,  F02D41/10

CPC分类号： F02D41/022 ,  F02D41/10 ,  F02D2200/1002 ,  F02D2200/501 ,  F02D2200/602

摘要： A control device and method controls a vehicle having an internal combustion engine connected to an automatic transmission via a torque converter with a lockup device. The torque of the internal combustion engine is limited the by a torque limit value based on a speed difference between an input rotational speed and an output rotational speed of the torque converter during acceleration in a non-lockup state. The torque-limiting of the internal combustion engine is prohibited torque-limiting upon a prescribed condition being met. The prescribed condition is met by a heating request, during hill climbing/towing, during travel at high vehicle speeds, when the accelerator pedal opening angle exceeds or is equal to a prescribed opening angle, when the torque limit value is greater than a target torque, in a range other than a D range, or in a mode other than normal mode.

公开(公告)号：US11460103B2

公开(公告)日：2022-10-04

申请号：US16963561

申请日：2019-01-17

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

发明人： Koji Saito ,  Akira Nakainkyo ,  Naoyasu Ikeda ,  Xuming Wang

IPC分类号： F16H61/14

摘要： A lockup disengagement control device for an automatic transmission including a torque converter including a lockup clutch, and a lockup control section, the lockup disengagement control device includes: when a brake is operated from a brake OFF to a brake ON during a coast traveling in an engagement state of the lockup clutch, the lockup control section being configured to sense an initial deceleration by the brake ON operation, and to set a lockup release vehicle speed to be higher as an absolute value of the initial deceleration is greater, and when a vehicle speed is sensed to be equal to or smaller than the set lockup release vehicle speed in a middle of a brake deceleration scene by the brake ON operation, the lockup control section being configured to disengage the lockup clutch.