Aisin Aw Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Toshihiko Aoki

Minoru Todo

Satoru Kasuya

Kazuhisa Ozaki

Takuya Ishii

Hiroshi Kato

Tomochika Inagaki

Satoshi Fukuyama

Yousuke Andoh

Masahiro Hayabuchi

Masaaki Nishida

Takuya Fujimine

Takashi Morimoto

Takayoshi Kato

Terufumi Miyazaki

Atsushi Honda

Kazutoshi Nozaki

Masaru Morise

Hirofumi Ota

Akiharu Abe

Nobutada Sugiura

Shinji Oita

Masafumi Kinoshita

Kenji Gotou

Atsushi Tabata

Yoshio Hasegawa

Akira Hoshino

Yuichi Seki

Nobukazu Ike

Takuya Nakajima

Masahiro Otake

Kazuya Kawamura

Masanori Murakami

Michio Nobata

Masaki Suzuki

Tomochika Inagki

Yousuke Andou

Minoru Toudou

An automatic transmissionincludes: a Simpson type complex planetary gear trainincluding single pinion type first and second planetary gearsandand single pinion type third and fourth planetary gearsand; first through fourth clutches Cto C; and first and second brakes Band B. A first carrierof the first planetary gearis coupled to an input shaft. A first ring gearof the first planetary gearis selectively connected to an output shaftby the first clutch C

Multiple speed transmission

A transmission device, wherein the compound planetary gear mechanism increases the speed of the power transmitted to the input element and transmits the resultant power to the first and the second output elements when the fixable element is non-rotatably held stationary by the first brake; and the first and the second clutches are disposed on a side closer in the axial direction to the compound planetary gear mechanism than the first and the second planetary gear mechanisms.

Transmission device

An automatic transmission that shifts power applied to an input member and outputs the shifted power to an output member, the automatic transmission including a first planetary gear mechanism, a third planetary gear mechanism, a compound planetary gear mechanism, a first clutch, a second clutch, a third clutch, a fourth clutch a first brake, and a second brake.

Automatic transmission

A hydraulic clutch includes a clutch drum with an outer cylinder that slidably holds a plurality of clutch plates, an inner cylinder that axially extends from an inner circumference of a sidewall, and a sleeve fitted inside the inner cylinder. A clutch piston presses the clutch plates. A plate and the clutch piston define an oil chamber that cancels centrifugal hydraulic pressure. An oil passage that communicates with the oil chamber is on an inner circumferential surface of the inner cylinder. One surface of the sleeve contacts a step formed on the inner cylinder. The sleeve includes a passage in communication with the oil passage and formed on an outer periphery of the sleeve to axially extend toward the end surface, and a second passage formed more axially recessed than an end surface and radially extending to provide communication between the first passage and an inner portion of the sleeve.

Hydraulic clutch and transmission device provided with the same

In a power transmission device, a breather chamber having an opening on its one end side and extending coaxially with the countershaft is formed in a countershaft that transmits power from an output shaft of an automatic transmission to a differential mechanism. An inner end of a vent pipe placed so as to extend through a transmission case and that includes the inner end and an outer end each having an opening is inserted in the opening of the breather chamber. A plug, which closes a gap between an inner peripheral surface of the breather chamber and an outer peripheral surface of the inner end of the vent pipe so as to allow air to flow between the inside of the transmission case and the breather chamber and so as to restrict entrance of hydraulic oil into the breather chamber, is placed in the opening of the breather chamber.

Power transmission device

An output side transfer memberof a second clutch C-extends around the outer circumferences of the output side transfer membersof the third and first clutches C-, C-, the output side transfer member(or) of a fourth clutch C-and the output side transfer memberof a third clutch C-are linked to a sun gear S, the output side transfer member(or) of a fourth clutch C-, an output side transfer memberof a third clutch C-, and a sun gear S, which rotate integrally, are disposed radially inward with respect to the output side transfer memberof the first clutch C-. Thereby, it becomes possible to reduce the diameter of the output side transfer member(or) of the fourth clutch C-, to reduce the weight and inertia, and to improve the controllability of the automatic transmission

Automatic transmission for a vehicle

A vehicle automatic transmission includes a planetary gear that reduces a speed of an input rotation of an input shaft and outputs a reduced speed rotation; at least two clutches that are capable of transmitting the reduced speed rotation that passes through the planetary gear; a planetary gear set having at least two rotation elements, wherein each rotation element can transmit the reduced speed rotation transmitted by the clutches; and an input transmitting clutch that is capable of transmitting the input rotation into one of the at least two rotation elements.

Automatic transmission for vehicle

A connection structure for an automatic transmission includes a drum member that includes a base portion, an outer diameter portion that extends from an outer diameter side of the base portion in an axial direction, and a collar portion that extends from an inner diameter side of the base portion in the axial direction; a base member that includes a raised portion, an outer diameter portion that extends from an outer diameter side of the raised portion in the axial direction, a boss portion that extends from an inner diameter side of the raised portion in the axial direction, and a connection portion that extends from an end of the outer diameter portion; and a ring gear of a planetary gear that includes a spline groove and a circular concave groove on an end portion of an inner peripheral face.

Connection structure for automatic transmission

A vehicular automatic transmission is provided with a reduction planetary gear for reducing and outputting an inputted rotation of an input shaft, first and third clutches for enabling the transmission of a reduced rotation reduced through the reduction planetary gear, a planetary gear unit having second and third sun gears to which the reduced rotation is transmitted by the first and third clutches and a fourth clutch for enabling the transmission of the inputted rotation to the second sun gear. The fourth clutch is linked to the second sun gear of the planetary gear unit via output side members, i.e., a clutch drum and a link member, of the third clutch to commonly use as the output side members. Thereby, the automatic transmission may be compactly built.

Vehicular automatic transmission

An automatic transmission including a mechanical reduction gear connected to an input shaft that generates a decelerated rotation smaller than a rotation of the input shaft from a decelerated rotating member and a compound planetary gear for shifting with a first element, a second element, a third element, a fourth element, and a fifth element.

In a hydraulic servo for a clutch, a cancel plate is disposed on a second clutch drum that undergoes the same rotation as a second clutch drum provided with a cylinder portion, in such a fashion that the cancel plate is restricted from moving to a side opposite from a return spring in an axial direction. The first clutch drum is disposed, as a separate member, on the second clutch drum. A step portion of the second clutch drum prevents the first clutch drum from moving to a side opposite from the cancel plate. Due to the spring force of the return spring, the oil pressure in the cancel oil chamber and the oil pressure in the operating oil chamber, the force that presses the first clutch drum to the step portion is always greater than the force that presses the first clutch drum to the cancel plate side.

Clutch-purpose hydraulic servo

A speed-reducing gear unit is provided for causing a reduced-speed rotation output member to have a reduced rotation that is slower than rotation of an input shaft. The reduced-speed rotation output member is switched between a reduced-speed rotation state and a free rotation state by rotation state switching means. The reduced-speed rotation of the reduced-speed rotation output member is selectively transferred to fourth and first elements of a speed-changing dual planetary gear unit via first and third control clutches. The rotation of the input shaft is transferred to a second element via a second control clutch. Rotations of the first and second elements are selectively restricted by first and second control brakes. A third element is connected to an output shaft. This makes it possible to provide a high-efficiency automatic transmission that achieves seven or more forward gear ratios so as to allow optimal extraction of engine performance in a high vehicle speed region and reduce the vehicle speed change at the time of a gear shift and therefore provide a good feeling, by adding gear speeds including a locked-up speed at a high gear speed side so that adjacent gear ratios are closer to each other.

A multi-speed automatic transmission improves transmission efficiency by reducing drag loss due to high speed rotation of a freely rotating element of a planetary gear set. An automatic transmission for a vehicle includes: an input path T of a first speed ratio; an input path T which has a larger speed ratio than this input path T ; a planetary gear set of four elements, wherein the four elements are a first element, a second element, a third element, and a fourth element following an order of elements on a speed diagram; a clutch C- transmitting a rotation of the input path T to the first element S ; a clutch C- transmitting the rotation from the input path T to the fourth element S ; a clutch C- transmitting a rotation from the input path T to the first element; a clutch C- transmitting the rotation from the input path T to the second element C ; a brake B- engaging the fourth element; a brake B- engaging the second element; and an output member coupled with the third element R . Accordingly, drag resistance is prevented from increasing because no extremely high speed rotation of the freely rotating element is generated, even when a speed is achieved using any combination of the engagement elements.

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Anjo, Japan

Toshihiko Aoki