Aisin Aw Co., Ltd.

Yousuke Andoh

Kazuhisa Ozaki

Minoru Todo

Toshihiko Aoki

Takuya Ishii

Satoshi Fukuyama

Tomochika Inagaki

Takuya Fujimine

Tomochika Inagki

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 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

Growing community of inventors

Tokyo, Japan

Yousuke Andoh