Aisin Ai Co., Ltd.

Takuya Yoshimi

Shiro Ogami

Norio Kayukawa

Yuichi Fukuhara

Hiroyuki Kato

Toshiya Uematsu

Masaki Kawamoto

In a transmission, a lubrication oil retention section is formed to surround an area around a circumferential part of a first gear that ranges from a lubrication oil storage region to the outside of the lubrication oil storage region. In the lubrication oil retention section, the lubrication oil scooped up by the rotation of the first gear is retained between the lubrication oil retention section and the first gear at the outside of the lubrication oil storage region. The lubrication oil retention section enables the first gear to splash the lubrication oil retained at the outside of the lubrication oil storage region, toward a receiver that flows the lubrication oil to various sliding parts of the transmission.

Transmission

In an automatic dual-clutch transmission, a lowest speed driven gear, other driven gears and a reverse gear are provided on a first output shaft to be freely rotatable. A 2nd speed driven gear and a highest speed driven gear are provided on a second output shaft to be freely rotatable. Further, the 2nd speed driven gear is provided with a large-diameter gear meshing with a 2nd speed drive gear and a small-diameter gear provided bodily with the large-diameter gear, being fewer in tooth number and smaller in diameter than the large-diameter gear, and meshing with the reverse gear. Thus, the automatic dual-clutch transmission is reduced in diameter by not having an output shaft dedicated to the reverse gear and is able to set the gear ratio for reverse to be large.

Automatic dual-clutch transmission

Growing community of inventors

Nishio, Japan

Takuya Yoshimi