Nissan Motor Company Limited

Jatco Corporation

Seiichirou Takahashi

Hironori Miyaishi

Daigo Kishi

Koji Saito

Yoshinobu Kawamoto

Yoshihisa Kodama

Yoshinori Yamamura

Yukiyoshi Inuta

Yasuhiro Endo

Hiromichi Akebono

Yusuke Nakano

Tomohiro Utagawa

Tetsuya Shimada

Yuji Oishi

Makoto Oguri

Takurou Kawasumi

Hiromu Soya

Shohei Imaji

Satoru Ishii

Takao Arimatsu

Jumpei Hayakawa

Tetsuya Nishiyama

Daisuke Nagae

Peng Liu

Shou Okutani

Masahiro Kusuda

Tatsuo Nakano

Katsuyuki Hara

A control device for a transmission is used in a transmission that is provided with a continuously variable transmission mechanism including a primary pulley to which a drive force of a drive source mounted on a vehicle is input, a secondary pulley that transmits the drive force of the drive source to a drive wheel, and an endless annular member that is wound around the primary pulley and the secondary pulley. The control device includes a controller configured to perform a gear shift control of changing a transmission gear ratio of the continuously variable transmission mechanism to a high side when rotational oscillation occurs in a rotation member of the continuously variable transmission mechanism and then the rotational oscillation decreases a rotation speed of the rotation member.

Control device for transmission

A transmission comprising: a primary pulley; a secondary pulley; a transmission member wound around the primary pulley and the secondary pulley; an oil pump configured to supply oil; a hydraulic control circuit configured to adjust a pressure of the oil supplied from the oil pump to a line pressure which is a source pressure of a primary pulley pressure supplied to the primary pulley and a secondary pulley pressure supplied to the secondary pulley; a line pressure detection unit configured to detect the line pressure; and a controller configured to control the hydraulic control circuit, wherein the controller is configured to select, as a target pulley pressure, a higher one of a target value of the primary pulley pressure and a target value of the secondary pulley pressure, variably set, according to an oil temperature, a target differential pressure including a detection variation of the line pressure detection unit that varies according to the oil temperature, set a target line pressure which is a target value of the line pressure to a total pressure of the target pulley pressure and the target differential pressure, and control the hydraulic control circuit such that the detected line pressure is adjusted to the target line pressure.

Transmission, method for controlling transmission, and non-transitory computer- readable medium

A transmission used for executing, a process of performing, when a speed at which an accelerator opening is decreased is higher than a predetermined speed, an upshift until a predetermined opening is reached, and fixing a speed ratio, a process of performing, when the speed is equal to or lower than the predetermined speed and a turbine rotation speed is higher than a predetermined rotation speed, the upshift until the predetermined opening is reached, and performing, when the accelerator opening is smaller than the predetermined opening, the upshift so as to fix the speed ratio, and a process of performing, when the speed is equal to or lower than the predetermined speed and the turbine rotation speed is equal to or lower than the predetermined rotation speed, the upshift until the predetermined opening is reached, and performing, when the accelerator opening is smaller than the predetermined opening, the upshift.

Continuously variable transmission, method for controlling continuously variable transmission, and non-transitory computer-readable medium

A continuously variable transmission includes: a first pulley and a second pulley each including a fixed pulley and a movable pulley; and an endless member wound around the first pulley and the second pulley, wherein the continuously variable transmission continuously changes a speed ratio by controlling a thrust of the movable pulley with a hydraulic pressure, the thrust of the movable pulley is made smaller as a rotation speed of the first pulley decreases, and when the rotation speed of the first pulley is lower than a predetermined rotation speed, the thrust of the movable pulley in a case where the speed ratio is on a Low side of the predetermined speed ratio is not made smaller than the thrust of the movable pulley in a case where the speed ratio is on a High side of the predetermined speed ratio.

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.

Control method and control device for internal combustion engine for vehicle

[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.

Automatic transmission, control method for automatic transmission, and non-transitory computer-readable medium

A belt-type continuously variable transmission includes a primary pulley, a secondary pulley, and a belt wound around the primary pulley and the secondary pulley. A controller performs a process, when performing a low speed position return shift to shift a transmission ratio toward a lowermost speed position while a vehicle is decelerating. The process includes: calculating a primary pressure actual lower limit, at which the belt actually starts to slip, based on the transmission ratio and a deceleration of the vehicle; setting a lower limit of a setpoint of the primary pressure to the primary pressure actual lower limit; setting the primary pressure actual lower limit higher with a locking tendency of a vehicle wheel detected than that without the locking tendency detected; and setting the primary pressure actual lower limit with the locking tendency detected to increase as the transmission ratio varies toward the lowermost speed position.

Belt-type continuously variable transmission

A vehicle control device for controlling a vehicle including a variator provided in a power transmission path between a driving source and a driving wheel of a vehicle and a friction engaging element provided between the variator and the driving wheel, engaged when a running range is selected, while disengaged when a non-running range is selected and shutting off transmission of power through the power transmission path is provided. In this embodiment, an operating state of the vehicle is detected, a target speed ratio of the variator according to the operating state of the vehicle is set, if an actual speed ratio of the variator is smaller than the target speed ratio, shifting control of lowering a supply hydraulic pressure to a primary pulley of the variator and increasing the speed ratio of the variator is executed, and when the selection is switched from the non-running range to the running range during execution of the shifting control, lowering of the supply hydraulic pressure to the primary pulley after the switching is regulated.

Vehicle control device and vehicle control method

Growing community of inventors

Isehara, Japan

Seiichirou Takahashi