Jatco Corporation

Nissan Motor Company Limited

Tetsuya Izumi

Hironori Miyaishi

Hiroki Iwasa

Akito Suzuki

Hironori Nihei

Seonjae Kim

Tomoyuki Mizuochi

Shingo Suzuki

Kenichi Watanabe

Takuichiro Inoue

Takashi Eguchi

Toshiji Iida

Masayuki Miyazono

Kakuzou Kaneko

Taiichi Onoyama

Kouichi Kotsuji

Fumito Shinohara

Masumi Fujikawa

Kunihiro Takahashi

Keisuke Iwado

Yuji Okamoto

Makoto Komatsu

Takanobu Mouri

Ryuichi Arai

Ryuzo Noguchi

Masashi Suwabe

Seishi Shimamura

Akihiro Toyofuku

Satoshi Harui

Sungpil Ryu

Hiroyasu Tanaka

Masaaki Uchida

Seiichiro Takahashi

Yusuke Kimura

Hideshi Wakayama

Takayuki Tanaka

Toshiyuki Shibuya

Yasuhiro Endo

Hiroshi Sekiya

Kwang-ho Lee

Takateru Kawaguchi

Tomohiro Utagawa

Kouji Saitou

Kenji Nakashima

Takahiro Kobayashi

Seiji Kasahara

Aki Hayakawa

Kiyotaka Sawano

Toshimitsu Araki

Toshiaki Motomura

Kazuhiro Miyachi

Akihiro Tanabe

Naohiro Hoshi

Takeshi Chibahara

Yasunori Ishii

Ryu Sungpil

Yuta Ishinabe

Kazuki Ishida

Takuya Numata

Toru Koga

Kwang-Ho Lee

The present invention is related to a vehicle including a motor-generator, a transmission, a shift hydraulic control unit, and a CVT control unit (CVTCU). When a downshift of the transmission is performed without an acceleration request from a driver, the CVTCU sets a pulley thrust at a secondary pulley on the basis of a first lower limit as a lower limit, which is a sum of a fundamental thrust and a first correction thrust. The CVTCU also sets a pulley thrust at a primary pulley on the basis of a second lower limit as a lower limit, which is a sum of the fundamental thrust and a second correction thrust.

Vehicle and method for controlling the same

Provided are a variator and a transmission controller in an engine-driven vehicle. The transmission controller has an instantaneous interruption recovery control portion configured to, upon a power reset from an instantaneous interruption during running, set a target through transmission ratio and a desired through transmission ratio to a lowest transmission ratio value by initialization and perform recovery control to recover an actual through transmission ratio of the variator to a transmission ratio value for shifting to normal control. The instantaneous interruption recovery control portion is further configured to, upon the power reset from the instantaneous interruption during the running, set a change speed of the target through transmission ratio from the lowest transmission ratio value to the desired through transmission ratio, to be higher than that under the normal control, before a time at which the desired through transmission ratio value deviates from the lowest transmission ratio value.

Device for controlling vehicular variator

In a vehicle equipped with a torque converterhaving a lock-up clutch (), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch () initiates torque transmission, is carried out. When the lock-up clutch () experiences a transition to an engaged state during travel, a meet-point learning control unit () 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 (&#x3c4;&#xb7;Ne). 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.

Lock-up clutch control device for vehicle, and lock-up clutch control method

A hydraulic pressure controller includes belt sandwiching force increasing means. The belt sandwiching force increasing means increases a belt sandwiching force by a primary pulley and a secondary pulley on the basis of a braking force request from a driver, up to a predetermined value to prevent a belt from slipping due to a braking force. The belt sandwiching force increasing means increases the belt sandwiching force in a range of less than the predetermined value before the braking force request occurs.

A vehicle control device for controlling a vehicle including an oil pump driven by a transmission of a rotation of the motor-generator; and a hydraulic pressure supply unit for supplying a hydraulic pressure to the continuously variable transmission. The hydraulic pressure is generated by regulating a pressure of an oil discharged from the oil pump. When a regenerative braking is performed by the motor-generator based on a deceleration request from a driver, the hydraulic pressure supply unit supplies a hydraulic pressure based on a first hydraulic pressure and a second hydraulic pressure to the continuously variable transmission. The first hydraulic pressure is a hydraulic pressure to transmit an input torque input to the continuously variable transmission during the regenerative braking. The second hydraulic pressure is a hydraulic pressure to shift the continuously variable transmission during the regenerative braking. During the regenerative braking, the first hydraulic pressure is set to equal to or less than a hydraulic pressure found by subtracting the second hydraulic pressure from a hydraulic pressure suppliable to the continuously variable transmission.

Vehicle control device and method for controlling the same

An oil pump driving control device of a vehicle having a main oil pump () that is driven by a motor/generator () and produces a pump discharge oil to a first clutch (), a second clutch () and a belt-type continuously variable transmission () provided on a driving force transmission line. A hybrid control module () is provided in this FF hybrid vehicle. The hybrid control module () is configured to perform a control so that during vehicle stop, the lower an ATF oil temperature is, the more the pump driving energy to drive the main oil pump () is decreased. With this control, consumption energy during the vehicle stop can be reduced.

Vehicle oil pump driving control device

An FF hybrid vehicle control device having an HEV mode and an EV mode as drive modes is provided with a CVT control unit () for determining primary pulley pressure (Ppri) and secondary pulley pressure (Psec) with which a belt () of a belt-type continuously variable transmission () will be clamped on the basis of a torque component inputted to the belt-type continuously variable transmission () during brake deceleration, and the corrected amount of brake torque which is an inertia torque correction component. The CVT control unit () reduces the corrected amount of brake torque during brake deceleration when EV mode is selected to be less than the corrected amount of brake torque during brake deceleration when HEV mode is selected.

Hybrid vehicle control device

Disclosed is a control apparatus for a vehicular transmission comprising: a vehicle speed sensor; an accelerator opening angle sensor; and a gear-shift control section (D) of a CVTECU. The vehicle speed sensor includes: an output shaft rotation speed sensor () configured to detect a rotation speed (rotation numbers) of an output shaft () of the automatic transmission; road wheel rotation speed sensors configured to detect rotation speeds (rotation numbers) of four road wheels (B throughE); and a vehicle speed calculating section (B) of CVTECUconfigured to calculate the vehicle speed from the information of the road wheel rotation speeds when a preset predetermined condition as a condition under which vertical variations of the rotation speed of the output shaft are generated is established and calculate the vehicle speed from the output shaft rotation speed information if the predetermined condition is not established.

Control device for automatic transmission for vehicle

A controller is provided so as to control, when an electric vehicle (EV) mode is selected, a belt clamping pressure on the basis of discharged oil from a main oil pump which is driven by a motor generator. The controller is provided for a hybrid vehicle and is configured to perform control such that when the vehicle is stopped in the EV mode and a creep cut condition which does not require creep torque from the motor generator is met, a first motor idling rotation speed is set as a motor rotation speed. When the vehicle is stopped in the EV mode and a standby learning control completes learning of a zero-point oil pressure command value, the controller reduces a rotation speed of the motor generator to a second motor idling rotation speed which is lower than the first motor idling rotation speed.

Control device for hybrid vehicle

A displayed rotation speed control apparatus for a hybrid vehicle includes: a displayed rotation speed controller having a display mode in which a target primary rotation speed stepwisely set is displayed as a driving source rotation speed in the rotation speed display device in the simulated stepwise shift mode, when the mode is switched from the EV mode to the HEV mode to initiate a starting of the engine, and when the mode is switched from the continuous shift mode to the simulated stepwise shift mode while an actual engine speed is smaller than a predetermined rotation speed, the displayed rotation speed controller being configured to display a value obtained by retarding the actual engine speed, during a period from the initiation of the starting of the engine to a rotation speed smaller than a predetermined rotation speed.

Displayed rotational speed control apparatus for vehicle

When a switch condition where a shift of a continuously variable transmission is switched from a first shift that is any one of an upshift and a downshift to another second shift is satisfied, an integral term in the feedback control of the first shift is reduced to zero with a first predetermined gradient, an operation of an integral term in the feedback control of the second shift is started after the switch condition is satisfied and before the integral term in the feedback control of the first shift reaches zero, and the continuously variable transmission is shifted based on a sum of the integral term in the feedback control of the first shift and the integral term in the feedback control of the second shift.

Control device for continuously variable transmission and method for controlling the same

A transmission controller increases hydraulic pressure supplied to a secondary pulley and decreases hydraulic pressure supplied to a primary pulley to shift a variator to a mechanical Low speed ratio when the hydraulic pressure supplied to the primary pulley and the secondary pulley vibrates. The transmission controller shifts the variator from the mechanical Low speed ratio to a High side when a sub-transmission mechanism is downshifted during controlling a speed ratio of the variator at the mechanical Low speed ratio.

Continuously variable transmission and method for controlling the same

A transmission controller increases hydraulic pressure supplied to a secondary pulley and decreases hydraulic pressure supplied to a primary pulley to shift a variator to a mechanical Low speed ratio during the hydraulic pressure supplied to the primary pulley and the secondary pulley vibrates. The mechanical Low speed ratio is a speed ratio where a groove width of the primary pulley has a maximum value possible to be employed in structure of the primary pulley.

A device for controlling a start of a vehicle includes a rotation speed obtaining unit that obtains an actual engine rotation speed of the engine, a target rotation speed computing unit that computes a target rotation speed of the engine in the slip control, a control target value computing unit that computes a control target value, which is a target value for controlling the engine rotation speed to the target rotation speed based on the actual engine rotation speed and the target rotation speed, and an instruction value computing unit that computes an instruction value for the lock-up clutch necessary to control the engine rotation speed to the control target value based on the control target value.

Vehicle startup control device and startup control method

A transmission controller determines whether a shift returning to low, changing a speed ratio of a continuously variable transmission to the lowest when a vehicle decelerates, is being performed or not, calculates a primary pressure measured lower limit value at which a belt begins to slip actually, based on a deceleration of the vehicle and the speed ratio of the continuously variable transmission, and sets a lower limit value of a target value of the primary pressure during the shift returning to low as the primary pressure measured lower limit value.

Continuously variable transmission and its hydraulic pressure control method

Growing community of inventors

Ayase, Japan

Tetsuya Izumi