Mazda Motor Corporation

Yuya Takemura

Masanori Sasaki

Masamichi Fujikawa

Takeyuki Tanaka

Yasuo Miura

Masashi Morihiro

Hirokazu Kouno

Shinya Okumura

Kazuyuki Shiino

A friction engagement device of an automatic transmission is provided, which includes a rotational member comprised of at least one of a drum member and a hub member including a spline part engaged with a friction plate to be movable in axial directions of the automatic transmission, and a drive force transmitting part for exchanging a drive force with another rotational element. The drive force transmitting part of the rotational member is made of a ferrous metal. A part of the rotational member other than the drive force transmitting part is made of a clad material containing a first material that is easily joined to the ferrous metal and a second material that is less easily joined to the ferrous metal compared to the first material and weighs less than the ferrous metal.

Friction engagement device of automatic transmission

Growing community of inventors

Yamaguchi, Japan

Yuya Takemura