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Title:
AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2017/145916
Kind Code:
A1
Abstract:
This automatic transmission includes: a piston movable in an axial direction; a plurality of friction plates arranged on a first surface side of the piston; a fastening hydraulic chamber for applying hydraulic pressure to a second surface of the piston and causing the piston to move to a fastening position at which the friction plates are pressed so as to be fastened together; a releasing hydraulic chamber for applying hydraulic pressure to the first surface and causing the piston to move to a releasing position at which the friction places are released from each other; and a hydraulic control valve that supplies or discharges hydraulic pressure to the fastening hydraulic chamber or from the releasing hydraulic chamber. The area, which receives pressure from the hydraulic oil, on the second surface of the piston is set to be larger than that on the first surface.

Inventors:
FUKUDA, Yutaro (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
SAITO, Tadashi (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
KAJI, Masahiro (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
SASAHARA, Manabu (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
KUBO, Tomohiro (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
KAMADA, Shinya (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
IWASHITA, Norio (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
SAKO, Kaori (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
ISHIZAKA, Tomotaka (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
IWASAKI, Tatsuhiko (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
SAJI, Koshiro (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
MIZOBE, Tatsutoshi (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
Application Number:
JP2017/005788
Publication Date:
August 31, 2017
Filing Date:
February 16, 2017
Export Citation:
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Assignee:
MAZDA MOTOR CORPORATION (3-1 Shinchi, Fuchu-cho Aki-gu, Hiroshima 70, 〒7308670, JP)
International Classes:
F16D48/02; F16D25/063; F16D25/0638
Foreign References:
JPH0469414A1992-03-04
JPH023706A1990-01-09
JPS6345249U1988-03-26
JPH10131984A1998-05-22
Other References:
See also references of EP 3404280A4
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (Osaka Nakanoshima Building 2nd Floor, 2-2 Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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