Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyoda Jidosha Kabushiki Kaisha

Atsushi Honda

Hirofumi Ota

Akiharu Abe

Kazutoshi Nozaki

Atsushi Tabata

Akira Hoshino

Terufumi Miyazaki

Minoru Todo

Yu Miyahara

Fusahiro Tsukano

Katsumi Kono

Shinya Nakamura

Mikio Iwase

Masafumi Kinoshita

Kazuyuki Noda

Yuji Inoue

Hiroyuki Amano

Atsushi Kamada

Kazuhisa Ozaki

Yuji Suzuki

Akira Fukatsu

Naoyuki Kishimoto

Tetsuya Yamaguchi

Tadashi Sekiguchi

Morihiro Matsumoto

Motoki Tabuchi

Husahiro Tsukano

Katsuhisa Ishii

Nobuhiro Sato

Hirotsugu Yoshino

Toshihiko Aoki

Takaho Kawakami

Takuya Ishii

Shuhei Horita

Takuya Fujimine

Takuya Nakajima

Shingo Aijima

Naoya Okada

Hiroki Kondo

Seiji Kuwahara

Yuichi Seki

Ken Imamura

Nobutada Sugiura

Takayuki Hayashi

Kojiro Kuramochi

Hironori Asaoka

Daisuke Okamoto

Hirofumi Nakada

Masato Nakano

Isamu Shiotsu

Tomoe Osada

Hiroyasu Honda

Akinori Goto

Ayato Noumori

Junko Ichikawa

Tomohiro Katada

Kutsuhisa Ishii

Takeshi Ootsuki

Satoru Ishikawa

An automatic transmission includes a main transmission and an auxiliary transmission. The auxiliary transmission includes an auxiliary-transmission-side planetary gear mechanism, a first clutch, and a second clutch. The auxiliary-transmission-side planetary gear mechanism is provided between a pair of main-transmission-side planetary gear mechanisms, and a part of the auxiliary-transmission-side planetary gear mechanism is located within the main transmission. The first clutch fixes rotation of a sun gear of the auxiliary-transmission-side planetary gear mechanism. The second clutch connects a ring gear of the auxiliary-transmission-side planetary gear mechanism with the sun gear.

Automatic transmission

A vehicle casing includes a metal frame and a resin cover that covers the metal frame. The resin cover accommodates vehicle components inside the metal frame. The metal frame includes a bearing supporting boss portion that rotatably supports, inside the resin cover, a shaft member that is one of the vehicle components and rotates about a shaft center, and a mount boss portion that is for fixing the vehicle casing to a vehicle body. The bearing supporting boss portion is disposed at a position separate from an inner surface of the resin cover. The resin cover is disposed to cover the entire metal frame except a portion provided with the mount boss portion.

Vehicle casing

A clutch apparatus includes a clutch drum and a band. The clutch drum includes spline large-diameter portions protruding outward in a radial direction of the clutch drum and spline small-diameter portions protruding inward in the radial direction. The spline large-diameter portions and the spline small-diameter portions are arranged alternately in a circumferential direction of the clutch drum. The band is wound around an outer peripheral portion of the clutch drum, and is made of carbon fiber reinforced plastic. The spline large-diameter portions are provided with a protrusion protruding outward in the radial direction. The band includes a recessed portion with which the protrusion is engaged. The recessed portion is provided at a position at which the recessed portion faces the protrusion.

Clutch apparatus of transmission for vehicle

An automatic transmission includes a first engagement mechanism selectively engaging a first rotating member to a second rotating member, a second engagement mechanism selectively engaging the first rotating member to a third rotating member, and other engagement mechanisms. At least one of the first or second engagement mechanisms is a dog clutch. The automatic transmission sets intermediate, high and low speed stages by controlling the engagement mechanisms. The first engagement mechanism is kept engaged in shifting from the high speed stage to the intermediate speed stage. The second engagement mechanism is kept engaged in shifting from the low speed stage to the intermediate speed stage. When the automatic transmission sets the intermediate speed stage by controlling the other engagement mechanisms, a rotation speed of the rotating member that is coupled to the first rotating member by the dog clutch coincides with a rotation speed of the first rotating member.

Automatic transmission for vehicle

A torsional vibration reduction device that is provided inside of a fluid power transmitting device that has a driving side member that generates a fluid flow, and a driven side member that is driven by the fluid flow, includes a rolling element configured to move in a reciprocating manner according to a variation in torque; a retaining member that has a rolling chamber configured to house the rolling element in a manner that enables the rolling element to move in a reciprocating manner; and a housing configured to shield the rolling element and the rolling chamber from fluid inside of the fluid power transmitting device. The retaining member is enclosed and fixed inside the housing, and the housing is fixed to the driven side member.

Torsional vibration reduction device

A torsional vibration reducing apparatus is provided. The torsional vibration reducing apparatus includes a rotating body having a rolling chamber, and a rolling body including a support shaft portion, a first flange portion, a second flange portion, a first corner portion, and a second corner portion. The support shaft portion is housed in the rolling chamber. The flange portions are located respectively at either end of the support shaft portion in an axial direction. A position defined by the support shaft portion and the first flange portion is the first corner portion, and a position defined by the support shaft portion and the second flange portion is the second corner portion. In a section of the rolling body that is along a central axis of the support shaft portion, sectional shapes of the first corner portion and the second corner portion differ from each other.

Torsional vibration reducing apparatus

A translational force Fh to one side in a rotational axis direction is caused to act from a hydraulic piston to a sleeve when an engaged stage between an engagement tooth and an engaged tooth is maintained, so that translation of the sleeve to the other side in the rotational axis direction and consequent disengagement of the engagement tooth and the engaged tooth can be prevented. Therefore, the engaged state between the engagement member and the engaged member can be stably maintained regardless of the condition of the torque acting from the drive source to the engagement member.

Engagement device and automatic transmission

To prevent response delay and to damp torsional vibration transmitted to a power transmission route. A vibration damper includes a first route Rprovided with a coil springas an elastic member, and a second route Rprovided with a sun gearas an inertial body formed to be parallel as power transmission routes between an engineto a transmission, and by switching the first route Rand the second route Rby a first clutch Cand a second clutch C, switchover to a state in which an inertial torque acts on the power transmission route by the sun gearand a state in which the inertial torque is not generated is carried out.

Vibration damper

A torsional vibration reducing device is provided. The torsional vibration reducing device includes a rotating body, a plurality of rolling bodies, and a connection member. The connection member connects the plurality of rolling bodies, and at least two contact portions are positioned on an inner surface of each of the plurality of accommodating portions, a portion of an outer peripheral surface of each of the plurality of rolling bodies being positioned in each of the plurality of accommodating portions, and the outer peripheral surface of each of the plurality of rolling bodies being configured to come into point contact with the contact portions in the circumferential direction of the rotating body.

Torsional vibration reducing device

A torsional vibration reducing device includes a rotating body, rolling bodies, and a connection member. The rotating body includes guide holes, and the connection member includes accommodating portions that has at least two contact portions. The accommodating portions are positioned in the guide holes, and the guide holes accommodate the rolling bodies. The accommodating portions are configured to hold the outer peripheral surface of each of the rolling bodies with the contact portions, in a direction in which the rolling body reciprocates.

A torque converter in which a torsional vibration damping device is fastened firmly to a turbine hub in such a manner that a hermeticity test can be carried out easily. In the torque converter, a turbine runner is fixed to the turbine hub through a first rivet. The torsional vibration damping device is assembled as a unit independent from the turbine hub and a rolling mass is held in a casing liquid-tightly. The torsional vibration damping device and the driven member are fixed to the turbine hub through a second rivet.

Torque converter having torsional vibration damping device

A controller is configured to obtain a speed ratio equivalent value that is determined by a speed ratio set in a transmission unit, and is configured to control an engine by setting an operating point of the engine such that the operating point in the case where a lockup clutch is engaged and the speed ratio equivalent value is large is lower in an output rotation speed for a predetermined output torque than the operating point in the case where the lockup clutch is engaged and the speed ratio equivalent value is smaller than the large speed ratio equivalent value.

Control system for vehicle

A vibration damping device in which a covering member can be fixed firmly to a rotary member by a rivet is provided. In the vibration damping device, a pendulum massis held in a rotary member, and a casingis fixed to the rotary memberby a rivet. The rivetcomprises a head, a first shaftand a second shaft. The first shaftpenetrates through a first casing member, the rotary memberand the second casing member, and a tail thereof is expanded to fasten those members. The second shaftpenetrates through a driven member, and a tail thereof is expanded to fasten the driven member to the rotary member

Vibration damping device

A vehicle oil pump having a first member and a second member relatively rotatable around one axial center such that one of them is inserted in an inner circumferential side of the other, includes: a slider member interposed there between in a direction orthogonal to the one axial center, being relatively immovable in circumferential direction around the one axial center with respect to the first member and slidable in a direction parallel to the one axial center. In the vehicle oil pump, a cam groove is formed in a circumferential surface of the second member facing the first member, a projecting portion is disposed on the slider member being fitted in the cam groove, and the cam groove causes the slider member to reciprocate in the one axial center direction in association with rotation of the slider member relative to the second member around the one axial center.

Vehicle oil pump

A solenoid valve includes a valve housing in which a spool valve element is fitted to be reciprocably slidable along an axis; a magnet coil that moves the spool valve element in a first direction along the axis by an action of an electromagnetic force; a return spring that biases the spool valve element in a second direction, opposite to the first direction, and moves the spool valve element in the second direction when the magnet coil is not excited; and first and second attraction members that are respectively fixed to the spool valve element and the valve housing such that they are spaced from each other along the axis by a distance no less than a maximum moving amount of the spool valve element and attract each other by an attraction force smaller than a bias force of the return spring when the magnet coil is not excited.

Solenoid valve

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Seto, Japan

Atsushi Honda