Aisin Aw Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Aisin-warner Kabushiki Kaisha

Aishin Kako Kabushiki Kaisha

Aisin Aw Ltd., Co.

Masaaki Nishida

Masahiro Hayabuchi

Kazumasa Tsukamoto

Hiroshi Tsutsui

Satoru Kasuya

Yoshihisa Yamamoto

Akitomo Suzuki

Hiroshi Katou

Takao Taniguchi

Hiroshi Kato

Yutaka Teraoka

Masashi Kitou

Kouichi Kojima

Youichi Hayakawa

Chihiro Hosono

Akitoshi Kato

Takayuki Kubo

Nobutada Sugiura

Takayuki Hisano

Yoichi Hayakawa

Akihito Iwata

Yuichi Seki

Masao Saito

Nobukazu Ike

Muneo Kusafuka

Kenji Gotou

Kohei Iizuka

Shuzo Moroto

Masashi Kito

Toshihiko Aoki

Kazuhiro Mikami

Shoichi Miyagawa

Nobuhiro Iwai

Tatsuya Iida

Saoto Tsuchiya

Mitsutaka Okuno

Kiyoshi Akutsu

Kenichi Tsuchida

Tomochika Inagaki

Masatake Ichikawa

Takashi Morimoto

Akitoshi Katou

Naoji Kato

Takahiro Inoue

Yukio Hiramoto

Masahiro Ida

Ryuji Ibaraki

Masahiko Ando

Masatoshi Adachi

Akira Isogai

Minoru Todo

Tsuyoshi Mikami

Kozo Kato

Masamichi Unoki

Toru Souda

Masao Saitou

Yusuke Takahashi

Toshihiro Kano

Masaki Nishide

Shingo Uozumi

Masahiro Yamaguchi

Norihiro Tokunaga

Masato Fujikawa

Yuito Abe

Hideo Ono

Hiroki Shintani

Junichi Nishimura

Katsuyuki Tanahashi

Kaoru Nadayoshi

Kengo Nomura

Tsuyoshi Kawamoto

Kaoru Ono

Mitsutaka Ito

Nobukazu IKe

Toshihiro Yamada

Nobutada Sigiura

Hidekazu Funakoshi

Yochi Hayakawa

Makoto Shimanaga

Tomohisa Miyamoto

Chichiro Hosono

An automatic transmission includes first and second clutches disposed adjacent, wherein each of the first and second clutches includes a friction plate; a clutch drum in spline engagement with the friction plate; a piston that with the clutch drum forms a hydraulic oil chamber therebetween; a return spring that biases the piston toward the hydraulic oil chamber side; and a cancel plate that is disposed on a side opposite the hydraulic oil chamber of the piston to form a cancel oil chamber that cancels outs a centrifugal hydraulic pressure that acts on the hydraulic oil chamber, and that receives a reaction force of the return spring.

Automatic transmission

An automatic transmission includes a starting apparatus having a housing that rotates based on torque of a driving source, and a clutch mechanism portion positioned in the housing; an oil pump that is positioned on a side opposite to the driving source with respect to the starting apparatus in a rotational axis direction of the housing, and is driven by transmission of rotation of the housing; an oil pump housing in which the oil pump is accommodated; and a speed change mechanism that is positioned on a side opposite to the starting apparatus with respect to the oil pump housing in the rotational axis direction, and has an input shaft, which extends through the oil pump and the oil pump housing and is connected to the clutch mechanism portion.

An automatic transmission includes an input shaft, an acceleration/deceleration output unit that is coupled to the input shaft and has a first element that selectively outputs a decelerated rotation or an accelerated rotation of the input shaft and a second element that outputs a same number of rotations as the input shaft, a multiple planetary gear set for shifting having third, fourth, fifth and sixth elements, a first clutch coupling the first element and the sixth element selectively, a second clutch coupling the input shaft and the fourth element selectively, a third clutch coupling the first element and the third element selectively, a fourth clutch coupling the second element and the third element selectively, a first brake fixing the third element selectively, a second brake fixing the fourth element selectively and an output shaft coupled directly to the fifth element.

A lubricating oil supply device for an automatic transmission that includes a washer arranged inside the automatic transmission and regulating a movement of an input shaft in the automatic transmission in a shaft direction, wherein the washer includes: an oil reception section that receives lubricating oil scattered by a centrifugal force in a radial direction of the input shaft of the automatic transmission, and a guide path that guides the lubricating oil received by the oil reception section to a thrust surface at an end surface of the washer in the shaft direction.

Lubricating oil supply device for automatic transmission

A lubricating oil feeding device includes a carrier and a carrier cover that are attached to both ends of the pinion shaft of the planetary gear and that are arranged in an axial direction of an input shaft of the automatic transmission; an oil sump groove that opens in a peripheral direction and the axial direction of the input shaft, the oil sump groove is structured by a wall portion of the carrier cover formed radiating from a center of the input shaft, a base portion of the carrier cover that extends in an axial direction of the pinion shaft, and an end portion on an inner peripheral surface of a clutch hub that is connected with the base portion; and an oil passage that feeds lubricating oil from the oil sump groove to the pinion shaft, and provides the lubricating oil for the planetary gear.

Lubricating oil feeding device for automatic transmission

An automatic transmission that includes two adjacent clutches. Two clutches each include a clutch drum, a piston that structures an operating oil chamber with a portion of the clutch drum used as a cylinder, a plurality of friction plates that engage with the clutch drum, a cancel oil chamber that is arranged on a back surface side of the piston and that cancels a centrifugal oil pressure acting on the operating oil chamber, and a return spring that is provided within the cancel oil chamber and that is structured between a cancel plate and a back surface of the piston and that biases the piston toward the operating oil chamber.

An automatic transmission which can establish properly separated gear ratios of forward ten gears or eleven gears and reverse two gears, which is simple and compact and can comfortably change gears. A fourth sun gear of a speed-changing dual planetary gear is connected to a speed-reducing common ring gear of a speed-reducing dual planetary gear through a first clutch, a speed-changing common carrier is connected to an input shaft through a second clutch and is selectively fixed by a second brake. A third sun gear of the speed-changing dual planetary gear is connected to the speed-reducing common ring gear of the speed-reducing dual planetary gear through a third clutch, connected to the speed-changing common carrier through a fourth clutch, and selectively to a first sun gear through a fifth clutch, and is selectively fixed through a first brake. A speed-changing common ring gear is directly connected to an output shaft.

An automatic transmission that is structured such that the first clutch, the third clutch, and the fourth clutch are disposed in an axial direction more toward the speed-reduction planetary gear than the planetary gear unit; friction plates of the first clutch are disposed so as to be offset in the axial direction with respect to friction plates of the third clutch and friction plates of the fourth clutch; and the friction plates of the fourth clutch are disposed such that at least a portion thereof coincides in the axial direction with the friction plates of the third clutch on an inner peripheral side of the friction plates of the third clutch.

An automatic transmission that includes one clutch that includes a clutch drum; a piston that forms a hydraulic oil chamber using a part of the clutch drum as a cylinder; a plurality of friction plates that engage with the clutch drum; and a cancel oil chamber that is provided on a rear side of the piston and that cancels a centrifugal oil pressure that acts on the hydraulic oil chamber. Oil is supplied to the cancel oil chamber from a boss portion formed in the clutch drum on a radially inner side, and the oil is discharged from discharge holes formed in the boss portion to an outside of a hydraulic oil chamber side of the clutch drum.

An automatic transmission that includes two clutches that are provided in mutually different positions in a radial direction while overlapping each other in an axial direction. The two clutches each include a clutch drum; a piston that structures a operating oil chamber while using a part of the clutch drum as a cylinder; a plurality of friction plates that engage the clutch drum; and a cancel oil chamber that is disposed on a back face side of the piston and that cancels a centrifugal hydraulic pressure acting on the operating oil chamber.

Lubricating oil supply holes are drilled into a first member that is fitted to a plurality of first annular plates by a spline. Of splines to which each lubricating oil supply hole corresponds, lubricating oil grooves provided in the plurality of first annular plates do not overlap the splines on at least one of the front and rear surfaces of the first annular plates, and therefore lubricating oil flowing out of the lubricating oil supply holes is dispersed in a circumferential direction and flows from the inner periphery to the outer periphery of the first annular plates, rather than gathering in each lubricating oil groove and flowing in an outer peripheral direction. As a result, a force generated by an axial lubricating oil flow, which acts in a direction for causing the second annular plates to contact friction materials on the first annular plates, is suppressed, leading to a reduction in drag torque.

Friction engagement device

An automatic transmission includes two clutches that are disposed such that they overlap in an axial direction and occupy different positions in a radial direction. Each of the two clutches includes a clutch drum, a piston that forms a working fluid chamber for which a portion of the clutch drum serves as a cylinder, a plurality of friction plates that engage the clutch drum, and a cancel oil chamber that is disposed on a rear face side of the piston and that cancels a centrifugal oil pressure that acts on the working fluid chamber.

An automatic transmission that includes two clutches that are disposed at positions that overlap in an axial direction and are different in a radial direction. The two clutches each include: a clutch drum, a piston that structures a working oil chamber with a portion of the clutch drum used as a cylinder, a plurality of friction plates that engage the clutch drum, and a cancel oil chamber that is disposed on a back surface side of the piston and that cancels a centrifugal hydraulic pressure that acts on the working oil chamber. An inner spline is formed on the clutch drum of one clutch, among the two clutches, that is positioned on an outer diameter side. An outer spline is formed on the clutch drum of the other clutch, among the two clutches, that is positioned on an inner diameter side.

A transmission case is provided with a housing enclosing a clutch and/or torque converter connected to an engine, and a shifting mechanism case enclosing a shifting mechanism in an oil-tight state that is connected to the housing. A focus for stress resulting from an impact load acting on the transmission case is formed as a frangible portion in the housing. Thus, damage to the transmission from an excessive load is limited to the housing, and by absorbing the impact from that damage, damage to the shifting mechanism case is prevented and oil leakage from the transmission case is avoided.

Transmission case

In a breather device linking a space within a transmission case () to outside air, a breather () is provided at a middle position in a lengthwise direction on an upper portion of the transmission case, in particular, at a position displaced in an axial direction from a middle position in the lengthwise direction, and opens to outside air via a ventilating mechanism () that extends in a direction opposite this displaced direction. Thus, through the combination of displacement in a lengthwise direction of the position of the breather with respect to a middle portion in a lengthwise direction of the transmission case and the direction of the ventilating mechanism facing in a direction opposite that direction, the occurrence of breather blow is prevented during both forward and rearward axis tilting of the transmission by an action where a forward side of the ventilating mechanism lowers when,the position of the breather tilts in a direction away from the oil level, and conversely, where the forward side of the ventilating mechanism rises when the position of the breather tilts in a direction towards the oil level.

Breather device for speed-change devices

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Anjo, Japan

Masaaki Nishida