公开(公告)号：US20210062914A1

公开(公告)日：2021-03-04

申请号：US16957954

申请日：2018-12-13

Applicant: JATCO Ltd ,  NISSAN MOTOR CO., LTD.

Inventor： Yasuhiro ENDO ,  Akihiro TANABE ,  Takahiro YAMADA ,  Shohei IMAJI ,  Masayuki MANNEN

IPC: F16H61/14 ,  F16H61/662 ,  F16H59/68 ,  F16H59/14 ,  F16H59/46

Abstract: A continuously variable transmission (2) has a torque convertor (3) having a lock-up clutch (30) and a continuously variable transmission mechanism (5). A control unit (10) has a shift control unit (10C) configured to be able to perform a pseudo stepwise up-shift control that varies a transmission ratio of the continuously variable transmission mechanism (5) stepwise, a lock-up control unit (10A) configured to control an engagement state of the lock-up clutch (30), and a torque control command unit (10D) configured to perform a torque-down control of a driving source (1). When the engagement control of the lock-up clutch (30) and the pseudo stepwise up-shift control are performed at the same time, the torque control command unit (10D) configured to perform the torque-down control with a greater torque reduction mount.

公开(公告)号：US20180372220A1

公开(公告)日：2018-12-27

申请号：US15563028

申请日：2016-02-22

Applicant: JATCO Ltd ,  NISSAN MOTOR CO., LTD.

Inventor： Kohei KAMIYA ,  Tomoaki HONMA ,  Yasuhiro ENDO

IPC: F16H61/662 ,  F16H61/14 ,  F16H59/42 ,  F16H59/18 ,  F16H59/46

Abstract: A control device for an automatic transmission includes: a transmission gear ratio control section configured to control the transmission gear ratio so that a rotation speed of the output element rapidly becomes closer to a rotation speed of the internal combustion engine, a first engagement control section configured to perform a first engagement control to be brought to the full engagement state after the rotation of the internal combustion engine is increased in the slip engagement state while a torque transmission capacity of the lockup clutch is increased when the lockup clutch is switched through the slip engagement state to the full engagement state by an ON operation of an accelerator of the vehicle, the transmission gear ratio control being prohibited during the first engagement control by the first engagement control section.

公开(公告)号：US20240084753A1

公开(公告)日：2024-03-14

申请号：US18262202

申请日：2021-11-29

Applicant: Nissan Motor Co., Ltd. ,  JATCO LTD

Inventor： Tetsuya NISHIYAMA ,  Daigo KISHI ,  Tatsuo NAKANO ,  Seiichirou TAKAHASHI ,  Koji SAITO ,  Yukiyoshi INUTA ,  Takao ARIMATSU ,  Yasuhiro ENDO

IPC: F02D41/02 ,  F02D41/10

CPC classification number: F02D41/022 ,  F02D41/10 ,  F02D2200/1002 ,  F02D2200/501 ,  F02D2200/602

Abstract: 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：US20200023849A1

公开(公告)日：2020-01-23

申请号：US16485760

申请日：2018-01-26

Applicant: JATCO Ltd ,  NISSAN MOTOR CO., LTD.

Inventor： Toshimitsu ARAKI ,  Tomoaki HONMA ,  Yasuhiro ENDO ,  Hiroshi KUROIWA

IPC: B60W30/188 ,  B60W10/107 ,  B60W10/06 ,  F16H59/22 ,  F16H59/36 ,  F16H59/74 ,  F16H59/78 ,  B60W30/18

Abstract: A shift control device for a vehicle includes: an engine; a shift mechanism disposed between the engine and driving wheels; a shift control section configured to control a transmission gear ratio of the shift mechanism; and a fuel cut control section configured to stop a fuel supply to the engine, at least when an accelerator pedal is in a release state, and when an engine speed is equal to or greater than a predetermined rotation speed, the shift control section being configured to perform a minimum rotation speed restriction control to control the transmission gear ratio of the shift mechanism so that the minimum rotation speed of the engine is equal to or greater than the predetermined rotation speed regardless of a vehicle front condition and an accelerator operation condition.

公开(公告)号：US20180073632A1

公开(公告)日：2018-03-15

申请号：US15563326

申请日：2016-02-22

Applicant: JATCO Ltd ,  NISSAN MOTOR CO., LTD.

Inventor： Kohei KAMIYA ,  Tomoaki HONMA ,  Akito SUZUKI ,  Yasuhiro ENDO

IPC: F16H61/14 ,  B60W30/18

Abstract: A control device for an automatic transmission includes: a first engagement control section configured to bring the lockup clutch to a full engagement state after a rotation of the internal combustion engine is increased in a slip engagement state while a torque transmission capacity of the lockup clutch is increased, and a second engagement control section configured to add a predetermined capacity to the increased torque transmission capacity when the torque judging section judges an increase of the output torque of the internal combustion engine in a state where a sensed rotation speed difference in the slip engagement state of the engagement state of the first engagement control is increased to be equal to or greater than a first predetermined value, and then decreased to be equal to or smaller than a second predetermined value smaller than the first predetermined value.

公开(公告)号：US20170204968A1

公开(公告)日：2017-07-20

申请号：US15324587

申请日：2015-06-22

Applicant: JATCO Ltd ,  NISSAN MOTOR CO., LTD.

Inventor： Tomoaki HONMA ,  Kohei KAMIYA ,  Yuta SUZUKI ,  Itaru SHINOHARA ,  Hiroshi SEKIYA ,  Hiromu OGINO ,  Yasuhiro ENDO ,  Yuzuru TOHTA ,  Kouki SAITOU

IPC: F16H61/14 ,  F16D48/06

CPC classification number: F16H61/143 ,  F16D48/06 ,  F16D2500/10412 ,  F16D2500/1045 ,  F16D2500/30412 ,  F16D2500/3144 ,  F16D2500/70426 ,  F16D2500/7082 ,  F16H45/02 ,  F16H59/14 ,  F16H59/18 ,  F16H2059/145 ,  F16H2061/145 ,  Y10T477/635 ,  Y10T477/73

Abstract: A control device for a lock-up-clutch installed in a torque converter arranged between an engine and an automatic transmission mechanism includes an engagement control means that carries out a calculation to increase an engaging capacity of the lock-up-clutch with the passage of time during an engagement control time in which the torque converter is shifted from a converter condition to a lock-up condition in which the prime mover drives an auxiliary device and in which when, during the control to increase the engaging capacity of the lock-up-clutch, an input torque to the torque converter from the engine is increased due to reduction in load of the auxiliary device, the engagement control means promotes the increase of the engaging capacity of the lock-up-clutch based on the amount of increase of the input torque thereby eliminating undesired pressure shortage that would be induced in the period toward the lock-up condition.

公开(公告)号：US20160230822A1

公开(公告)日：2016-08-11

申请号：US15021514

申请日：2014-10-17

Applicant: JATCO LTD ,  NISSAN MOTOR CO., LTD.

Inventor： Yasuhiro ENDO ,  Kouji SAITOU ,  Kenji NAKASHIMA ,  Akito SUZUKI ,  Kyounggon CHOI

IPC: F16D48/06 ,  F16H45/02

CPC classification number: F16D48/066 ,  B60W10/026 ,  B60W2510/0208 ,  B60W2510/025 ,  B60W2540/10 ,  B60W2710/024 ,  F16D2500/10487 ,  F16D2500/70247 ,  F16H45/02 ,  F16H59/18 ,  F16H61/702 ,  F16H2045/002 ,  F16H2059/186 ,  F16H2061/145

Abstract: First temporary capacity reduction control that when acceleration ON is judged during coasting lock-up, brings lock-up clutch (20) into slip state by decreasing torque transmission capacity of lock-up clutch and subsequently returns lock-up clutch to lock-up state by increasing torque transmission capacity is executed. Control unit performing second temporary capacity reduction control that when return of accelerator pedal depression is judged during the progress of returning to lock-up state, decreases torque transmission capacity again and subsequently returns lock-up clutch to lock-up state by increasing torque transmission capacity is provided. In second temporary capacity reduction control, torque transmission capacity is decreased with predetermined torque transmission capacity by which lock-up clutch is not fully disengaged being lower limit value. Abrupt engagement of lock-up clutch and engine racing can be therefore avoided when acceleration is changed from ON to OFF during control of lock-up clutch from disengagement or slip state to lock-up state.

Abstract translation: 在惯性锁定期间判断为加速ON时的第一临时容量降低控制，通过减小锁止离合器的转矩传递容量使锁止离合器（20）成为滑动状态，并且随后将锁止离合器返回到锁定状态 通过增加扭矩传递能力来执行。 控制单元执行第二临时容量降低控制，当在返回到锁定状态的过程中判断出加速踏板下压的返回时，再次降低转矩传递能力，随后通过增加转矩传递能力将锁止离合器返回到锁定状态 被提供。 在第二临时容量降低控制中，转矩传递能力随着锁定离合器未完全脱离的预定转矩传递能力而下降，为下限值。 因此，在控制锁止离合器从脱离或滑动状态到锁定状态的过程中，加速度从ON变为OFF时，可以避免锁止离合器和发动机转速的突然接合。