AUTOMATIC TRANSMISSION

WIPO Patent Application WO/2013/046550

A1

Provided is an automatic transmission in which a centrifugal balance chamber overlaps with a friction plate in the axial direction, wherein worsening of fuel consumption is suppressed while compactness in the axial direction is maintained. An automatic transmission (1) comprises a second friction plate (17) that fastens a second drum (27) and a second hub (37), a second fastening hydraulic chamber (67) and a second centrifugal balance chamber (77), and a second piston (47) that fastens or releases the second friction plate (17); the second centrifugal balance chamber (77) overlaps with the second friction plate (17) in the axial direction. Further provided is a second oil path (9) for discharging hydraulic oil that is in the second centrifugal balance chamber (77) at a position that does not overlap with the second friction plate (17) in the axial direction.

WO/1991/008400	HYDRAULIC ACTUATING DEVICE FOR A FRICTION CLUTCH
WO/2012/029443	DRIVING FORCE TRANSMISSION DEVICE
WO/2014/085470	FRICTION PLATE WITH COMPRESSED OVERLAPPING SECTIONS

NAKASHIMA KYOSEI (JP)
MARUSUE TOSHIHISA (JP)
UEDA KENSUKE (JP)
SASAKI MASANORI (JP)
FUJIKAWA MASAMICHI (JP)

PCT/JP2012/005635

April 04, 2013

September 05, 2012

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MAZDA MOTOR (JP)
NAKASHIMA KYOSEI (JP)
MARUSUE TOSHIHISA (JP)
UEDA KENSUKE (JP)
SASAKI MASANORI (JP)
FUJIKAWA MASAMICHI (JP)

F16D25/0638

JP2007032636A	2007-02-08
JP2001041261A	2001-02-13
JPH1122748A	1999-01-26

MAEDA & PARTNERS (JP)
Patent business corporation MAEDA PATENT OFFICE (JP)

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