Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Other

Alsin-aw Kabushiki Kaisha

Aisan a W Kabushiki Kaisha

Kunihiro Iwatsuki

Hiromichi Kimura

Kazunori Ishikawa

Hiroji Taniguchi

Yoshio Shindo

Tooru Matsubara

Kazuyuki Shiiba

Hideaki Otsubo

Takuji Taniguchi

Hidehiro Oba

Takashi Ohta

Yasuhiro Oshiumi

Yasuo Hojo

Kazumasa Tsukamoto

Yuji Kashihara

Yutaka Taga

Masahiko Ando

Hideo Tomomatsu

Kazumi Hoshiya

Yasunori Nakawaki

Hideaki Ootsubo

Takayuki Amaya

Yoshihisa Yamamoto

Kagenori Fukumura

Kazuhiko Hayashi

Hiroyuki Ishii

Masahiro Hayabuchi

Nobuaki Miki

Masato Kaigawa

Hiroyuki Yamaguchi

Hideyuki Suzuki

Takashi Ota

Kazutoshi Nozaki

Hiroyuki Nishizawa

Masataka Osawa

Masao Saito

Akira Fukatsu

Koji Takaira

Yoshinobu Nozaki

Toshihiro Shiimado

Hideki Aruga

Mamoru Niimi

Fumiaki Izumi

Takeya Oka

Yukihiro Kobayashi

Shinya Iizuka

Yoshiro Obayashi

Atsushi Tabata

Akira Suzuki

Seitoku Kubo

Noboru Takagi

Masashi Hattori

Mitsuru Takada

Hiroyuki Mori

Hideki Yasue

Takeshi Inuzuka

Takaaki Tokura

Norimi Asahara

Yoshiharu Harada

Yoshio Ito

Yoshikazu Sakaguchi

Yasunari Nakamura

Akira Matsui

Satoshi Shimizu

Koji Maeda

Tomokazu Inagawa

Shinichiro Tanaka

Yoshinori Maeda

Yoji Takanami

Tetsuo Hamajima

Masayuki Arai

Shigeo Kikori

Yasuhiko Higashiyama

Ryota Horie

Tadashi Kondo

Yukio Hamano

Masanori Kadotani

Hideki Tamoto

Shinji Kasuga

Yasushi Ando

Norihiro Mizoguchi

Masayoshi Hoshino

Hiroshi Sasaoka

Toru Matsubara

Keita Sakurai

Eiji Kato

Yukihiro Ikeda

Takuo Shimizu

Yasuhiro Kamei

Hideji Katoh

Kaunori Ishikawa

Hiromachi Kimura

Yoshio Shindou

Yoshihara Harada

Shigeru Kuroyanagi

Shintarou Mukougawa

Kohei Horiike

Takeo Hamada

Control device for a 4WD vehicle is provided. The 4WD vehicle includes a driving force source, main driving wheels, auxiliary driving wheels, a driving force transmission shaft, a first disconnection mechanism, and a second disconnection mechanism. The first disconnection mechanism and the second disconnection mechanism are engaged during 4WD traveling. One of the first disconnection mechanism and the second disconnection mechanism is a clutch. The control device includes an electronic control unit. The electronic control unit is configured to execute engagement control for controlling the engagement force of the clutch so that the driving force transmission shaft is maintained in a state prior to the initiation of a continuous increase in the rotation speed of the driving force transmission shaft.

Control device for 4WD vehicle

A rotation state of each rotating element of a four-wheel drive vehicle and an operating state of each engagement element of a disconnect mechanism, corresponding to an operating state of the disconnect mechanism, are displayed on or near a vehicle model image on a vehicle display. Thus, it is possible to inform a driver of the operating state of the disconnect mechanism at any time. Thus, the driver is able to recognize the operating state of the disconnect mechanism at any time, so the driver is able to carry out driving based on the operating state.

Control system for four-wheel drive vehicle

Even in the case where it is difficult to increase an engine torque (Te) during switching when a running is switched to a 4WD running or a 2WD running during a 2WD_d running, an alternative control section suppresses a fluctuation in the driving force of a four-wheel drive vehicle, hence it is possible to suppress a switching shock and an unnatural feeling of deceleration occurring during the switching to the 4WD running or the 2WD running.

In a control system, a transfer is connected to a rotation member between a driving power source and primary driving wheels and distributes dynamic power of the driving power source to secondary drive wheels. A driving power transmission shaft transmits the dynamic power of the driving power source distributed by the transfer to the secondary drive wheels. A connection-disconnection mechanism is disposed between the rotation member and the driving power transmission shaft. First and second clutches are disposed respectively between the driving power transmission shaft and right and left wheels of the secondary drive wheels. The electronic control unit is configured, when switching from a two-wheel-drive running state to a four-wheel-drive running state on the basis of a vehicle running state, to generate a transmission torque in the first clutch or the second clutch after controlling the connection-disconnection mechanism to engage the connection-disconnection mechanism.

Control system for four-wheel-drive vehicle

A control apparatus for a 4WD vehicle is provided. The control apparatus includes a driving force source, main driving wheels, auxiliary driving wheels, a driving force transmission shaft, a first disconnection mechanism, a second disconnection mechanism, and an electronic control unit. The electronic control unit is configured to: (i) control one of the first disconnection mechanism and the second disconnection mechanism to be engaged and then engage the other one of the first disconnection mechanism and the second disconnection mechanism when a disconnect state is canceled; and (ii) set, when the disconnect state is canceled, an increasing gradient of a rotation speed of the driving force transmission shaft in accordance with a condition that the electronic control unit determines to cancel the disconnect state.

Control apparatus for 4WD vehicle

A disconnect mechanism is configured to disconnect a predetermined rotating element from an engine and an auxiliary drive wheels while the vehicle is traveling in a two-wheel drive mode. The predetermined rotating element is configured to transmit power to the auxiliary drive wheels while the vehicle is traveling in a four-wheel drive mode. An electronic control unit is configured to: execute shift control when a shift condition of an automatic transmission is satisfied; selectively engage or release the disconnect mechanism based on a traveling state of the vehicle and a driver's predetermined operation; and control at least one of the automatic transmission or the disconnect mechanism such that a shift period based on the shift condition of the automatic transmission and an engagement-release period of the disconnect mechanism at least partially overlap with each other.

A drive power control apparatus for a vehicle includes a controller that adjusts the drive power for driving a vehicle to compensate for a parameter that affects the running state of the vehicle. When the vehicle enters a region where the acceleration of the vehicle needs to be changed based on the running environment or when the vehicle is traveling in the region in which the acceleration of the vehicle needs to be changed based on the running environment, the controller makes the amount by which the drive power is adjusted less than the amount by which the drive power is adjusted when the vehicle is traveling in a region other than the region in which the acceleration of the vehicle needs to be changed based on the running environment.

Drive power control apparatus and method for vehicle

In a driving force control apparatus and a driving force control method, a curve ahead of a vehicle is detected; a target vehicle speed is set to pass the curve; a starting-point shift speed is set to pass the starting point of the curve; and an end-point shift speed is set to pass the end point of the curve. After a shift speed is changed to the starting-point shift speed, it is determined whether an additional engine brake is required at the starting-point shift speed. If it is determined that the engine brake is not required, the shift speed is changed to the end-point shift speed. Alternatively, if a vehicle speed is lower than or equal to a value corresponding to the target vehicle speed after the shift speed is changed to the starting-point shift speed, the shift speed is changed to the end-point shift speed.

Driving force control apparatus and driving force control method

A control system for controlling a belt-type continuously variable transmission having a pulley capable of varying its groove width to which a belt is applied, in which the pulley is provided with an oil chamber to which the oil pressure is fed so that the pulley clamps the belt, in which the capacity of the oil chamber is varied in accordance with a change in the groove width, and in which the oil pressure in the oil chamber is controlled in accordance with a deviation between a target oil pressure and an actual oil pressure, comprising: a pressure-receiving capacity change detecting device for detecting a change in the capacity of the oil chamber; and an oil pressure control contents altering device for altering a degree to reflect the deviation on the oil pressure control of the oil chamber on the basis of a change in the capacity.

Control system for belt-type continuously variable transmission

A slippage detection system for a continuously variable transmission capable of continuously changing a ratio between a speed of rotation of an input member and a speed of rotation of an output member is provided. The slippage detection system calculates a correlation coefficient relating to the input rotation speed and the output rotation speed, based on a plurality of measurement values of the input rotation speed and a plurality of measurement values of the output rotation speed, and determines slippage of the torque transmitting member in the continuously variable transmission based on the calculated correlation coefficient.

Slippage detection system and method for continuously variable transmissions

An ECU executes a program for implementing a method that includes: a step of performing control so that torque capacity Tch of a frictional engagement device that is brought from an engaged state into a disengage state by a downshift operation is gradually reduced to start an inertia phase when a power-on downshift is performed; and a step of stopping the gradual reduction of the torque capacity Tch when the rate of change in an input shaft rotation speed NI of an automatic transmission has reached a desired rate of change &#x394;N(). Variation in output torque is kept small, and the shock that can occur at the time of a shift is thus reduced.

Apparatus for and method of controlling power train, and storage medium storing program for implementing the method

A deceleration control apparatus for a vehicle including a controller that performs deceleration control based on a first target deceleration set based on a distance to a starting point of an upcoming curve, when the deceleration control for the curve is started at a position distant from the starting point of the curve; and that performs the deceleration control based on a second target deceleration set based on a lateral acceleration that is estimated to be detected when the vehicle passes the starting point of the curve, when the deceleration control for the curve is started at a position close to the starting point of the curve. With this apparatus, it is possible to perform the deceleration control that provides drive assist according to the intention of the driver and that enhances driving convenience for the driver.

Deceleration control apparatus for vehicle

A control system of a power transmission mechanism, in which a transmission torque capacity between transmission members varies according to a pressure to be applied to the transmission members and in which the pressure to be applied to the transmission members is controlled on the basis of such a slip condition between the transmission members as accompanies the lowering of the pressure. The control system comprises: a pressure lowering device for lowering the pressure by a preset value; and a pressure setter for setting the pressure, in case the slip between the transmission members is not detected even by lowering the pressure by a preset value with the pressure lowering device, on the basis of the lowered minimum value of the pressure.

Control system for power transmission mechanism

A deceleration control apparatus and method for a vehicle, which performs deceleration control on the vehicle by an operation of a brake system which applies a braking force to the vehicle and a shift operation which shifts a transmission of the vehicle into a relatively low speed or speed ratio, performs the shift operation and the operation of the brake system such that a target deceleration set based on a curvature or curvature radius of a curve in a road ahead of the vehicle, a distance to the curve, and a vehicle speed, acts on the vehicle. As a result, a desired deceleration according to the distance to the curve is able to be applied to the vehicle.

Deceleration control apparatus and method for a vehicle

A declaration control apparatus and method for a vehicle, which performs deceleration control such that a deceleration acting on the vehicle becomes equal to a target deceleration by an operation of a brake system which applies a braking force to the vehicle and a shift operation which shifts a transmission of the vehicle into a relatively low speed or speed ratio, increases the target deceleration over time at a predetermined gradient to a predetermined value when a determination that there is a need to shift the transmission into a relatively low speed or speed ratio has been made, and after the target deceleration reaches the predetermined value, maintains the target deceleration at a generally constant value. As a result, a deceleration transitional characteristic of the vehicle is able to be improved.

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Toyota, Japan

Kunihiro Iwatsuki