公开(公告)号：US20180355969A1

公开(公告)日：2018-12-13

申请号：US15757841

申请日：2016-09-07

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

发明人： Yoshinobu KAWAMOTO ,  Seiji KASAHARA ,  Haibin MA

IPC分类号： F16H61/02 ,  F16H61/20 ,  F16H3/66 ,  F16H61/662

CPC分类号： F16H61/0204 ,  F16D2500/1026 ,  F16D2500/1088 ,  F16D2500/31426 ,  F16D2500/3144 ,  F16H3/663 ,  F16H59/22 ,  F16H61/00 ,  F16H61/20 ,  F16H61/66 ,  F16H61/662 ,  F16H61/66272 ,  F16H2059/446 ,  F16H2061/0087 ,  F16H2061/6614

摘要： A control device that controls an automatic transmission is provided, in which device the automatic transmission includes a variator disposed in a power transmission path between a driving source and a driving wheel of a vehicle, and a friction engaging element disposed between the variator and the driving wheel, in a manner capable of transmitting a power disconnectably via the power transmission path. The control device increases a speed ratio of the variator toward a predetermined target speed ratio with disengaging the friction engaging element during a vehicle stop of the vehicle, and executes a learning regarding a hydraulic control of the friction engaging element when the friction engaging element is disengaged during the vehicle stop. The control device decreases the target speed ratio at a time of learning when the learning is executed during the vehicle stop, compared to a time of vehicle stop other than the time of learning.

公开(公告)号：US20200182352A1

公开(公告)日：2020-06-11

申请号：US16641562

申请日：2018-08-28

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

发明人： Ken SON ,  Seiji KASAHARA

IPC分类号： F16H61/12

摘要： Selection solenoid valve (75) controls engagement/disengagement of travel clutch (31, 32) in synchronization with a selecting operation of selector lever (90) that selects a range position of belt-type continuously variable transmission (CVT). Selection solenoid valve abnormality diagnosing unit (Sa) is configured to, when performing a selecting operation from no-drive range to drive range, if a time required for travel clutch (31, 32) to be judged to be engaged from a start of selection of the drive range is less than a predetermined time, judge selection solenoid valve (75) to be a maximum hydraulic pressure side abnormality. When performing the selecting operation of drive range→no-drive range→drive range, if a selecting operation speed condition indicating that a no-drive range selection time is shorter than a setting time (Tth) is satisfied, execution of abnormality diagnosis of selection solenoid valve (75) is not permitted. With this configuration, misjudgment is prevented.

公开(公告)号：US20180245689A1

公开(公告)日：2018-08-30

申请号：US15757455

申请日：2016-08-31

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

发明人： Toshimitsu ARAKI ,  Seiji KASAHARA ,  Hideshi WAKAYAMA ,  Hiroyasu TANAKA

IPC分类号： F16H61/14 ,  F16D48/06

摘要： In a vehicle equipped with a torque converter (4) having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. After acquiring the current learning detection value (M_n), a meet-point learning control unit (12c) calculates the current detection error (E_n) on the basis of the difference between the current learning detection value (M_n) and the previous learning value (L_(n−1)) that is stored. When the current and previous detection errors (E_n) and (E_n−1) have the same plus/minus sign, the current learning value correction amount is set to a larger value if the absolute value |(E_n−1)| of the previous detection error (E_n−1) is large than if the absolute value |(E_n−1)| is small. The sum of the previous learning value (L_(n−1)) and the current learning value correction amount is set as the present learning value (L_n).

公开(公告)号：US20180245688A1

公开(公告)日：2018-08-30

申请号：US15753705

申请日：2016-08-12

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

发明人： Toshimitsu ARAKI ,  Seiji KASAHARA ,  Hideshi WAKAYAMA ,  Kouji SAITOU ,  Hiroyasu TANAKA

IPC分类号： F16H61/14 ,  F16H59/14

CPC分类号： F16H61/143 ,  B60Y2300/421 ,  F16D48/02 ,  F16H59/14 ,  F16H59/42 ,  F16H59/44 ,  F16H2059/147 ,  F16H2061/0087 ,  F16H2061/146

摘要： In a vehicle on which a torque converter having a lock-up clutch is mounted between an engine and a transmission, a meet point learning controller is provided to perform learning control for obtaining a learning value based on information on a meet point at which the lock-up clutch starts torque transmission. The meet point learning controller estimates a LU transmission torque based on a difference between an engine torque signal value and a torque converter transmission torque when the lock-up clutch moves from a non-engaged state to an engaged state during traveling of the vehicle, and uses, as the meet point information, a meet point detection pressure at a time when the LU transmission torque estimated value is determined to have entered an upward trend.

公开(公告)号：US20180216729A1

公开(公告)日：2018-08-02

申请号：US15758140

申请日：2016-08-31

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

发明人： Toshimitsu ARAKI ,  Hideshi WAKAYAMA ,  Kouji SAITOU ,  Seiji KASAHARA ,  Tetsuya IZUMI

IPC分类号： F16H61/14 ,  F16D48/06

CPC分类号： F16H61/143 ,  B60Y2300/421 ,  F16D48/02 ,  F16D48/066 ,  F16D2500/1026 ,  F16D2500/10412 ,  F16D2500/1045 ,  F16D2500/1107 ,  F16D2500/30421 ,  F16D2500/3065 ,  F16D2500/50251 ,  F16H59/14 ,  F16H2059/147 ,  F16H2061/0087 ,  F16H2061/146

摘要： In a vehicle equipped with a torque converter 4 having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. When the lock-up clutch (3) experiences a transition to an engaged state during travel, a meet-point learning control unit (12c) calculates an LU transmission torque estimate on the basis of the difference between the engine torque (engine torque signal value Te) and the torque converter transmission torque (τ·Ne2). Excess clutch capacity is detected when the LU transmission torque estimate is greater than an excess capacity determination transmission torque threshold within a prescribed amount of time after an initial pressure (P_n) based on the learning value (L_n) is instructed. When excess clutch capacity is detected, a learning value correction that reduces the learning value (L_n) is carried out.

公开(公告)号：US20160159359A1

公开(公告)日：2016-06-09

申请号：US14906871

申请日：2014-07-08

申请人： JATCO LTD

发明人： Seiji KASAHARA ,  Hideshi WAKAYAMA ,  Naohiro HOSHI

IPC分类号： B60W30/18 ,  B60W10/06 ,  F16H61/48 ,  B60W10/02

CPC分类号： B60W30/18118 ,  B60W10/023 ,  B60W10/06 ,  B60Y2200/92 ,  F16H61/48 ,  F16H61/66259 ,  F16H2059/663 ,  F16H2312/022 ,  F16H2312/04

摘要： A vehicle control device for controlling a vehicle with a drive source, a friction transmission mechanism provided between the drive source and drive wheels and a fluid transmission mechanism provided between the friction transmission mechanism and the drive source includes a suppression unit configured to suppress a decrease of a speed ratio of the fluid transmission mechanism if the speed ratio becomes negative when the vehicle starts.

摘要翻译： 一种用于控制具有驱动源的车辆的车辆控制装置，设置在驱动源和驱动轮之间的摩擦传动机构以及设置在摩擦传动机构和驱动源之间的流体传动机构，包括抑制单元， 如果车辆起动时速比变为负，则流体传动机构的速比。