公开(公告)号：US11054028B2

公开(公告)日：2021-07-06

申请号：US16643650

申请日：2018-11-13

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

发明人： Junki Matsui

IPC分类号： F16H61/662 ,  F16H61/00 ,  F16H61/02 ,  F16H61/12 ,  F16H59/46 ,  F16H59/68

摘要： A CVT is provided with a primary pulley (1) and a secondary pulley (2) between which a belt (3) is wound, and hydraulic pressure control valves (5, 6, 7) which control pulley hydraulic pressures. A CVT controller (8) sets a base current indicated value to be output to solenoids (5a, 6a, 7a) of the hydraulic pressure control valves (5, 6, 7), on the basis of a pulley hydraulic pressure indicated value. A dither control unit (58) of the CVT controller (8) superimposes a dither current onto the base current indicated value to be output to the solenoids (5a, 6a, 7a) if, during pulley hydraulic pressure control, the situation is determined, on the basis of belt slip determination information, to be such that belt slipping is highly likely to occur.

公开(公告)号：US10962111B2

公开(公告)日：2021-03-30

申请号：US16303905

申请日：2017-04-12

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

发明人： Yusuke Oota

IPC分类号： F16H61/66 ,  B60W10/101 ,  B60W10/18 ,  B60W10/06 ,  B60W30/18 ,  F02N11/08 ,  F16H61/00 ,  F16H61/662

摘要： A controller changes a shift line of the continuously variable transmission to a high rotation side when execution of automatic brake is detected during sailing stop which stops the engine while driving the vehicle.

公开(公告)号：US20210071755A1

公开(公告)日：2021-03-11

申请号：US16642047

申请日：2018-08-07

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

发明人： Sho OKUTANI ,  Takashi KOGUCHI ,  Makoto KOMATSU ,  Takashi NOBUKAWA

IPC分类号： F16H59/18 ,  F16H59/14 ,  F16H61/662

摘要： A vehicle has an engine (1) as a driving source. Output rotation of the engine (1) is transmitted to driving wheels (7) through a torque converter (2) equipped with a lock-up clutch, a first gear train (3), a transmission (4) formed by combination of a variator (20) and an auxiliary transmission (30), a second gear train (5) and a final speed reduction device (6). The second gear train (5) is provided with a parking mechanism (8) that mechanically locks an output shaft of the transmission (4) so that the output shaft of the transmission (4) cannot rotate during parking of the vehicle. A shift speed when down-shift is performed by the variator (20) during a torque-down request to the engine (1) is set to be slower than a shift speed when down-shift is performed by the variator (20) during a non-torque-down request.

公开(公告)号：US20200300357A1

公开(公告)日：2020-09-24

申请号：US16649227

申请日：2018-10-10

申请人： Mitsubishi Jidosha Kogyo Kabushiki Kaisha ,  JATCO Ltd

发明人： Noritaka AOYAMA ,  Azusa SHIMODA ,  Masataka OHTSUKA ,  Ken HIRASHITA ,  Nobuhiko MORIFUJI ,  Mitsuki ISHIZUKA ,  Hiromasa MASUDA ,  Yukinobu SAKAKIBARA

IPC分类号： F16H61/66 ,  F16H59/18 ,  F16H59/44 ,  F16H59/62 ,  F16H59/78 ,  F16H59/66 ,  F16H59/72

摘要： A transmission control device controls a CVT installed in a vehicle. The device has, as modes for the CVT, a CVT mode M1 for changing a transmission gear ratio steplessly based on the operating state of the vehicle, and a stepped transmission mode M2 for changing the transmission gear ratio stepwise based on the operating state of the vehicle. The device includes a transmission mode switching control unit (controller) 12 for controlling switching between the CVT mode M1 and the stepped transmission mode M2 based on an actual accelerator opening. The transmission mode switching control unit (controller) 12 performs switching from the CVT mode M1 to the stepped transmission mode M2, if the actual accelerator opening reaches or exceeds a first threshold value T1 set in a plurality of stages so as to increase stepwise in accordance with an increase in a vehicle speed.

公开(公告)号：US10731751B2

公开(公告)日：2020-08-04

申请号：US16319250

申请日：2017-07-19

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

发明人： Kunihiko Okumura ,  Takeshi Fujii

IPC分类号： B60W10/06 ,  B60W10/11 ,  F16H59/18 ,  F16H59/34 ,  F16H59/36 ,  F16H59/48 ,  F16H61/02 ,  F16H61/14 ,  F16H61/686

摘要： A control device for an automatic transmission of a vehicle includes a shift control section including; a deceleration state judging section configured to judge whether a deceleration of the vehicle is a gentle deceleration state or a sudden deceleration state, and a downshift control section configured to command a plural stage downshift to downshift from a current shift stage of the automatic shift mechanism to a target shift stage that is lower than the current shift stage by two stages or more when the deceleration state judging section judges the sudden deceleration state.

公开(公告)号：US10718429B2

公开(公告)日：2020-07-21

申请号：US16082588

申请日：2017-02-16

申请人： JATCO LTD

发明人： Takeaki Ishibashi ,  Syunsuke Ogasawara ,  Taisuke Hikita ,  Tomotaka Hirano

IPC分类号： F16H61/14 ,  F16H59/14 ,  B60W10/02

摘要： A slip lock-up control device for a vehicle includes a torque converter having a lock-up clutch, and a slip lock-up controller. The slip lock-up controller performs slip lock-up control using a lock-up pressure difference command to match an actual slip rotational speed to a target slip rotational speed based on engine torque information indicative of input torque, when a lock-up engagement condition is fulfilled when the lock-up clutch is in a released state. During the slip lock-up control, when in an engine torque unstable range for which an engine torque has a rise gradient with respect to a rise change of an engine speed, the slip lock-up controller sets the lock-up pressure difference command to a second lock-up pressure difference command for which a pressure difference fluctuation is averaged more than a first lock-up pressure difference command used in a range other than the engine torque unstable range.

公开(公告)号：US10704668B2

公开(公告)日：2020-07-07

申请号：US16334212

申请日：2017-07-27

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

发明人： Yutaka Okumura ,  Naoto Sato ,  Eiji Sasaki ,  Toshikazu Suzuki ,  Hirona Matsubara

IPC分类号： F16H57/04 ,  F16H57/027

摘要： An air breather chamber structure includes: a first breather chamber provided to a housing receiving a transmission; and a second breather chamber provided to an upper portion of the housing in a gravity direction, the first introduction hole being positioned on the first side of the imaginary surface, the second introduction hole being positioned on the second side of the imaginary surface, the atmosphere communication hole being positioned on the first side of the imaginary surface, the discharge hole being positioned on the second side of the imaginary surface, the first introduction hole and the discharge hole being positioned below the second introduction hole in the gravity direction, and the atmosphere communication hole being positioned above the second introduction hole in the gravity direction.

公开(公告)号：US10697536B2

公开(公告)日：2020-06-30

申请号：US15559027

申请日：2016-02-17

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

发明人： Masahiro Hamano ,  Youji Itou ,  Kosuke Abe ,  Haruka Ozono

IPC分类号： F16H61/12 ,  F16H9/18 ,  F16H61/662 ,  F16H61/00

摘要： In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic primary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the line command pressure. The controller variably controls primary command pressure, and in a case where the failure is determined, fixes the primary command pressure to a primary pressure set value. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.

公开(公告)号：US10683928B2

公开(公告)日：2020-06-16

申请号：US15558973

申请日：2016-02-09

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

发明人： Haruka Ozono ,  Masahiro Hamano

IPC分类号： F16H1/12 ,  F16H61/662 ,  F16H61/70 ,  F16H59/40 ,  F16H61/66 ,  F16H59/44 ,  F16H61/12 ,  F16H61/00

摘要： In a transmission control device, a controller determines failure of a rotation sensor. A hydraulic control circuit and the controller variably control a speed ratio of a variator. The hydraulic control circuit and the controller variably control a gear position of a sub-transmission mechanism, and in a case where the failure is determined, fix the gear position of the sub-transmission mechanism to first speed. The hydraulic control circuit and the controller fix the gear position of the sub-transmission mechanism to the first speed during a vehicle stop in a case where the gear position of the sub-transmission mechanism upon a determination of the failure is second speed.

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.