Aisin Aw Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Aisin-warner Kabushiki Kaisha

Aishin Aw Co., Ltd.

Other

Aisin Aw Kabushiki Kaisha

Aisin Aw Industries Co., Ltd.

Aisin Aw Ltd., Co.

Aisan a W Kabushiki Kaisha

Masahiro Hayabuchi

Kazumasa Tsukamoto

Masaaki Nishida

Satoru Kasuya

Yoshihisa Yamamoto

Hiroshi Tsutsui

Masahiko Ando

Hidehiro Oba

Yasuo Hojo

Takao Taniguchi

Takayuki Hisano

Yutaka Taga

Akitoshi Kato

Hiromichi Kimura

Akihito Iwata

Nobutada Sugiura

Yutaka Teraoka

Koji Noda

Atsushi Tabata

Akira Fukatsu

Hiroshi Katou

Seitoku Kubo

Masato Kaigawa

Akitomo Suzuki

Kazuhiro Mikami

Hiroshi Kato

Kagenori Fukumura

Nobukazu Ike

Muneo Kusafuka

Koji Maeda

Kouichi Kojima

Kenji Gotou

Toshihiro Kano

Tatsuya Iida

Shuzo Moroto

Toshihiko Aoki

Shoichi Miyagawa

Nobuhiro Iwai

Masanori Kadotani

Akitoshi Katou

Mitsutaka Okuno

Kunihiro Iwatsuki

Kenichi Tsuchida

Tokuyuki Takahashi

Kazuaki Watanabe

Tomochika Inagaki

Tetsuo Hamajima

Makoto Yamaguchi

Takashi Morimoto

Masahiro Yamaguchi

Kiyoshi Akutsu

Naoji Katou

Kaoru Nadayoshi

Yukio Hiramoto

Takahiro Inoue

Mitsutaka Ito

Yuuki Kousaka

Takashi Ohta

Hideo Tomomatsu

Koujiro Kuramochi

Hiroaki Sanji

Minoru Todo

Susumu Kato

Nobuaki Takahashi

Takayuki Kubo

Masashi Kitou

Masafumi Kinoshita

Masatake Ichikawa

Tetsuya Matsubara

Masamichi Unoki

Yoshito Takeshita

Shigeru Maeda

Shinji Kasuga

Katsunori Tanaka

Toshiyuki Mae

Saoto Tsuchiya

Katsuyuki Tanahashi

Junichi Nishimura

Kengo Nomura

Takuya Ooura

Motoki Koori

Nobuyuki Takahashi

Naoki Takabayashi

Kaoru Ono

Tomohiro Yamashita

Masahiro Ida

Tomohisa Miyamoto

Atsuya Takagi

Hajime Nishiguchi

Keishi Ohki

Kenji Shinohara

Akio Murakami

Hiroshii Tsutsui

Nobutada Sigiura

Yasuhiro Fujita

Takuya Ogino

Atsuki Ikeda

Nobukazu IKe

Yasuhiro Asai

Kouji Maeda

A laminated core punching apparatus, configured such that a stator-punching press machine that has a molding die performing a partial punching gradually approaches the shape of the stator core piece. There is a punching die to punching out the stator core piece from a strip-form steel plate, and two stator lamination stations. A rotor-punching press machine and a stator-punching press machine are constructed to operate synchronously. An intermediate loop portion capable of causing a strip-form steel plate to hang down in a loop is provided in order to adjust a length of the strip-form steel plate between the two press machines, and a loop guide portion that guides a loop locus of the strip-form steel plate from above so that the strip-form steel plate does not invert is disposed above the intermediate loop portion to be capable of ascending and descending.

Laminated core punching apparatus

A first element of a duplex planetary gear set is selectively coupled to an input shaft via a third clutch, or is selectively fixed via a first brake. A second element is selectively coupled, via a second clutch, to an intermediate shaft that is directly coupled to a speed-increasing element of a simplex planetary gear set which increases the rotational speed of the input shaft, or is selectively fixed via a second brake. A third element is directly coupled to an output shaft. A fourth element is selectively coupled to the input shaft via a first clutch. Therefore, by increasing the speed of the rotation of the input shaft by the simplex planetary gear set and transferring it to the duplex planetary gear set, it is possible to reduce the torques on individual components of an automatic transmission and therefore to reduce the sizes of the individual components and the capacities of the individual friction engagement elements.

Automatic transmission

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

The output rotation of an engine is transmitted to a drive member when a vehicle starts moving, and the drive member is connected to a carrier of a speed-increasing planetary gear via a start clutch. Upon engagement of the start clutch, the rotation of the drive member is accelerated by the speed-increasing planetary gear and then transmitted to an input shaft that is directly connected to a ring gear. Such rotation transmitted to the input shaft is shifted to a plurality of speeds and transmitted to an output shaft by using a plurality of friction engagement elements to selectively connect or fix elements of a single planetary gear set and a multiple planetary gear set that is connected to the output shaft.

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

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.

A clutch assembly for starting a vehicle without using a torque converter has a simple structure yet providing high reliability. In the clutch assembly, a clutch and a damper device are housed in a housing connected to a crank shaft of an engine. A boss serving as an output member is connected to an input shaft of an automatic transmission. An output of the engine is connected/disconnected to/from the input shaft upon engagement/disengagement of the clutch. The clutch includes a friction member and a piston fit oil tightly with the housing so as to apply pressure to the friction member. One end of the damper device is connected to a clutch hub, and the other end is connected to the output member. The clutch and the damper device are aligned on the axis of the housing.

Clutch assembly

A transmission has an oil drain passage for connecting an oil reservoir with a mission case in a pump casing. The automatic transmission has also a retainer serving as a shielding member to shield between a discharge opening of the oil drain passage from at least part of a multistage transmission mechanism. This ensures that breather oil blow, which is caused by the spattering and stirring of operating oil by the high-speed drum member, is shielded from at least part of the transmission mechanism.

A bottom portion of an intake port is provided with a sloped bottom surface formed of a plane such that sloped bottom surface approaches the side surfaces of external teeth and internal teeth from an upstream side to a downstream side in rotational direction of two rotors. Fluid that flows in the intake port is regulated by the sloped bottom surface and smoothly guided into individual inter-teeth chambers that are expanding. Since the sloped bottom surface on the bottom portion of the intake port is formed of a plane without spiral or twisting, design and manufacturing of a gear pump is extremely easy.

Gear pump

The invention has been made to eliminate a feeling of two-phase speed-change operations by causing a speed-change operation to proceed continuously when the speed-change operation is performed through two-phase control of engagement and release of four engagement elements. To accomplish this purpose, the invention provides a control apparatus for an automatic transmission wherein a predetermined speed-change operation is achieved through a pre-phase speed-change operation in which a first engagement element and a third engagement element are released and engaged respectively and through a post-phase speed-change operation in which a second engagement element and a fourth engagement element are released and engaged respectively. The control apparatus sets a target rotational acceleration of an input shaft of the transmission, and controls release of the second engagement element for a transition to the post-phase speed-change operation in accordance with the target rotational acceleration. Thus, the input speed during the transition from the pre-phase speed-change operation to the post-phase speed-change operation changes continuously, so that bluntness is prevented from being caused between the pre-stage and post-stage speed-change operations.

Speed-change control apparatus for automatic transmission

A planetary gear set including a plurality of pinions meshing with a sun gear and a carrier C that shaft-supports the pinions. The carrier has an annular peripheral wall that extends entirely around outer peripheries of the plurality of pinions. Thin-wall portions receded at a radially inner side are formed in the annular peripheral wall, at circumferential-direction positions corresponding to the positions of the pinions.

Planetary gear set

The level of quietness for an automatic transmission case is ensured by preventing vibration by improving the rigidity while suppressing the increase in the mass of a transmission case. In an automatic transmission case in which a valve body is attached to a case wall that covers the transmission mechanism, the rigidity of the automatic transmission case is increased by providing, in the case, an enclosing wall that projects out from the case wall and encloses the periphery of the valve body.

Automatic transmission case

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.

The invention eliminates the feeling of two-phase speed-change operations by causing a speed-change operation to proceed continuously when the speed-change operation is performed through two-phase control of engagement and release of four engagement elements. An automatic transmission is such that a predetermined speed-change operation is achieved through a pre-phase speed-change operation in which a first engagement element and a third engagement element are released and engaged respectively and through a post-phase speed-change operation in which a second engagement element and a fourth engagement element are released and engaged respectively. A control apparatus has a torque control capability for adjusting an input torque of a transmission during the pre-phase speed-change control, and ensures continuous changes in the input speed during the pre-phase and post-phase speed-change operations through adjustment of the input torque (torque reduction) to prevent bluntness from being caused between the pre-phase and post-phase speed-change operations.

Control apparatus for automatic transmission

A multi-stage automatic transmission using a reduction planetary gear and a planetary gear set in which the respective thrust forces generated thereat are supported by a low bearing load or a low case load. The automatic transmission is provided with a reduction planetary gear, coupled to an input shaft to fix a reaction force element so as to output a reduction rotation to an output element, and a planetary gear set, that outputs a speed shift rotation upon input of the subsequent reduction rotation. During at least first gear driving, there is provided a force transmission route in which thrust forces generated at one element of the reduction planetary gear and one element of the planetary gear set, respectively, are transmitted. In that route, a torsion direction of the helical teeth of the respective elements are set such that a direction of a thrust force of the element and a direction of the thrust force of the other element are different from each other during first gear driving.

Growing community of inventors

Anjo, Japan

Masahiro Hayabuchi