Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Tokai Rubber Industries, Ltd.

Toyota School Foundation

Other

Aisin Aw Co., Ltd.

Hitachi Cable, Inc.

Toyota Jidoshi Kabushiki Kaisha

Daisuke Inoue

Hiroki Kondo

Kenji Matsuo

Tadashi Tamura

Hiroji Taniguchi

Atsushi Ayabe

Akira Hino

Hideki Yasue

Mitsuhiro Fukao

Katsumi Kono

Motonori Kimura

Akihide Ito

Yoshiaki Yamamoto

Tadashi Ichikawa

Yuji Hattori

Shuhei Ishikawa

Kazuya Sakamoto

Kazuo Hasegawa

Hiroshi Ito

Michio Yoshida

Ryoji Habuchi

Hirofumi Nakada

Hiroya Tanaka

Tatsuya Yamashita

Isao Takagi

Kazuomi Okasaka

Kunio Hattori

Satoru Kato

Fumiharu Ogawa

Toshihiro Shiimado

Yusuke Ohgata

Tetsuo Hamajima

Takuro Shimazu

Hiroshi Morioka

Kazuya Saito

Akari Nakao

Koki Matsuoka

Yuuji Imanaga

Hiromichi Kimura

Seitoku Kubo

Kunio Morisawa

Seiji Kuwahara

Zenichiro Mashiki

Kagenori Fukumura

Takashi Ohta

Hideyuki Hashimoto

Tokuyuki Takahashi

Shinya Toyoda

Hiroyuki Matsubara

Akio Sato

Masami Sugaya

Satoshi Kato

Yasunari Nakamura

Akihito Hongo

Seiji Kojima

Yoshihiro Iijima

Hirofumi Kubota

Hiromitsu Nitani

Kazumasa Ohsono

Kyohei Suzumura

Sei Kojima

Bing Yao

Syoichi Sayo

Tomoya Okazaki

Mitsuhiro Toyoda

Kazuya Ishiizumi

Makoto Nakai

Kohei Yanaka

Arindam Halder

Shinichi Matani

Kohjiroh Kuramochi

Satoshi Taninaka

A first fiber is connected to a first end of a third fiber doped with a rare earth element, and a second fiber is connected to a second end of the third fiber. In the third fiber doped with the rare earth element, a central portion of a core is more heavily doped with the rare earth element than a peripheral portion of the core is.

Optical fiber laser device

A laser radar device includes: a light source; a projection light scanner that scans one part of light split off from emission light of the light source, and that generates transmission light for radiating onto a target object; an image forming section that forms plural respective reception lights of the transmission light reflected by respective locations of the target object into an image on a single flat plane as plural image-formation points; an optical receiver that is disposed at the plural image-formation points, and that includes plural unit optical reception sections for mixing each of the plural reception lights together with a reference light and performing optical heterodyne detection; and a reference light scanner that scans or distributes another light split off from the emission light from the light source, and that generates the reference light for radiating onto each of plural of the unit optical reception sections.

Laser radar, and light receiving method of laser radar

An engagement operation of a dog clutch is carried out while an engagement operation of a second clutch is being carried out, that is, during a situation that an uplock is hard to occur because of a phase shift generated between meshing counterpart members of the dog clutch. Thus, the dog clutch is easily engaged, and it is possible to facilitate preparation for transmission of power through a first power transmission path. If the dog clutch is not engaged, the second clutch is engaged and a second power transmission path is established, so it is possible to start moving a vehicle by transmitting power through the second power transmission path. Thus, when the dog clutch is in a non-engaged state at the time of an N-to-D shift during a stop of the vehicle, it is possible to ensure the startability of the vehicle.

Control apparatus for power transmission system

When a power transmission path of a power transmission system is set to a second power transmission path, a continuously variable transmission is controlled at a speed ratio (&#x3b3;) that provides a higher vehicle speed in the case where an input shaft angular acceleration (d&#x3c9;i/dt) is small than in the case where the input shaft angular acceleration (d&#x3c9;i/dt) is large. Therefore, it is possible to control the speed ratio (&#x3b3;) of the continuously variable transmission to a speed ratio (&#x3b3;) that reflects an inertial loss (Tli) of the continuously variable transmission. The inertial loss (Tli) changes with the input shaft angular acceleration (d&#x3c9;i/dt). Thus, in a vehicle in which the continuously variable transmission and a gear mechanism are provided in parallel with each other between an input shaft and an output shaft, it is possible to appropriately reduce a loss of the idling continuously variable transmission.

Control apparatus for vehicle

At the time when a hydraulic actuator is operated to engage a dog clutch, after it is detected that a hydraulic pressure for operating the hydraulic actuator is higher than or equal to a predetermined hydraulic pressure, it is determined whether the dog clutch is not engaged. Therefore, non-engagement determination due to insufficient hydraulic pressure for operating the hydraulic actuator is prevented. Thus, at the time when the hydraulic actuator is operated to engage the dog clutch, it is possible to prevent consumption of time to engage the dog clutch due to unnecessary re-engagement operation.

A switching optical antenna that includes: a waveguide including a light input end and a light output end; a ring waveguide coupled with the waveguide through a first directional coupler; a diffraction grating that is disposed within the ring waveguide and that is coupled with the ring waveguide through a second directional coupler; and a refractive index adjusting section that changes a refractive index of at least a portion of the ring waveguide.

Switching optical antenna, switching optical antenna array, and optical scanning device

A control apparatus for a vehicular continuously variable transmission is provided. The control apparatus includes a pair of pulley pressure adjusting valves, a pair of electromagnetic valves, a source pressure adjusting valve and an electronic control unit. The electronic control unit is configured to control the source pressure adjusting valve in such a manner as to lower the source pressure at a time of a fail mode below the source pressure at a time of a non-fail mode, at the time of the fail mode, and control command signals to the pair of the electromagnetic valves such that the command signals temporarily decrease below command signals at the time of the non-fail mode, before cancelling the lowering of the source pressure in making a changeover from the fail mode to the non-fail mode.

Control apparatus for vehicular continuously variable transmission

A clutch mechanism is configured to selectively change between a first power transmission path and a second power transmission path. The first power transmission path is configured to transmit torque to an output shaft via a transmission mechanism. The second power transmission path is configured to transmit the torque to the output shaft via a continuously variable transmission mechanism. An electronic control unit is configured to: (a) selectively change a power transmission path during traveling to one of the first power transmission path and the second power transmission path by controlling the clutch mechanism; and (b) in changing the power transmission path by controlling the clutch mechanism, control an operating point of the internal combustion engine during a change of the power transmission path so that the operating point crosses over an optimum fuel, consumption line of the internal combustion engine.

Vehicle driving system, control apparatus for vehicle driving system, and control method for vehicle driving system

In a control device for a vehicle including: a dog clutch mechanism that is disposed in a power transmission path in which a driving force is transmitted from an engine to a wheel and is operated by a hydraulic actuator; and an electric oil pump that supplies hydraulic pressure to the hydraulic actuator, rotation of the engine is stopped in a state in which the dog clutch mechanism is engaged by the hydraulic pressure supplied from the electric oil pump at a time during an engine stop operation, the rotation of the engine is started in the state in which the dog clutch mechanism is engaged by the hydraulic pressure supplied from the electric oil pump at a time during an engine restart operation, hence occurrence of up-lock of the dog clutch mechanism is prevented.

Vehicle control device and control method

In a power transmission device in which a first power transmission path is formed by engagement of a first clutch and a dog clutch and a second power transmission path is formed by engagement of a second clutch, the first clutch is released from a state where the first clutch and the dog clutch are engaged, and when a front-rear rotation speed difference of the dog clutch becomes equal to or greater than a predetermined value after the start of a clutch-to-clutch gear shift for engaging the second clutch, complete release control for releasing the first clutch to lower the torque capacity of the first clutch is performed.

Control device for vehicle

In a region in which a rate of change in slip ratio of a transmission belt with respect to a change in input torque exceeds a permissible slip ratio rate of change set in advance, a steep change in the slip ratio is suppressed by limiting the rate of change in the input torque.

Driving system for vehicle

Vehicle control system and method provided to change speed ratio smoothly when switching a power transmission route from a route including a geared transmission to a route including a continuously variable transmission. Vehicle control system applied to a vehicle comprising: continuously variable transmission for changing speed ratio continuously is disposed between input shaft and output shaft; geared transmission is disposed parallel to the continuously variable transmission, and is adapted to establish speed ratio that cannot be established by continuously variable transmission; and friction clutch is brought into engagement to switch torque transmission route from a route including the geared transmission to a route including the continuously variable transmission. Vehicle control system configured to start speed change operation of continuously variable transmission before the friction clutch is brought into engagement completely when switching torque transmission route from the route including the geared transmission to the route including the continuously variable transmission.

Vehicle control system and vehicle control method

When a line pressure is dominated (determined) by at least one of a primary pressure and a secondary pressure during idling of a continuously variable transmission, the hydraulic pressure that is applied to at least one of pulleys, to which the hydraulic pressure larger than a clutch pressure is applied, is reduced. On the other hand, when the line pressure is dominated by the clutch pressure during idling of the continuously variable transmission, the speed gear ratio of the continuously variable transmission is controlled to a lowest speed gear ratio.

Control apparatus for vehicle transmission

A diffraction structure includes a supporting layer, a high refractive index layer, and a low refractive index layer. The high refractive index layer has a first refractive index, is formed above the supporting layer, configures a waveguide guiding input light input from an input terminal along a specific direction, and includes an opening section formed along the specific direction. The low refractive index layer has a second refractive index lower that the first refractive index, and is formed so as to cover the high refractive index layer and fill the opening section. The opening section modifies the input light in at least one of direction or speed according to a wavelength of the input light, and outputs the modified light as output light.

Diffraction structure, diffraction grating, diffraction grating array, optical phased array, optical modulator, optical filter, laser source

In a vehicle in which a continuously variable transmission and a gear mechanism are provided in parallel on a power transmission pathway between an input shaft and an output shaft, (i) an electronic control unit performs CVT shifting, in view of shift characteristics of C to C shifting in which the speed ratio is changed in stages, or (ii) then electronic control unit performs C to C shifting, in view of shift characteristics of CVT shifting in which the speed ratio is steplessly changed.

Control system for vehicle

Growing community of inventors

Toyota, Japan

Daisuke Inoue