Aisin Aw Co., Ltd.

Satoshi Fukuyama

Kazuhisa Ozaki

Minoru Todo

Toshihiko Aoki

Takuya Ishii

Tomochika Inagaki

Yousuke Andoh

Takuya Fujimine

Tomochika Inagki

Yousuke Andou

Minoru Toudou

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 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

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Anjo, Japan

Satoshi Fukuyama