Patent ID: 7357235

Claim:
An automatic gearbox for a vehicle, with at least one hydraulically actuated shifting element ( 1 ) made as a transmission clutch, which comprises an inner disk carrier ( 7 ) and an outer disk carrier ( 4 ) on which, respectively, inner disks ( 9 ) and outer disks ( 8 ) are arranged rotationally fixed but axially displaceable, the inner and the outer disks being arranged alternating, one after another, to form a disk pack which is actuatable by an axial actuation force (F 1 ) of an actuator ( 16 ) for engaging the shifting element ( 1 ), and in which the outer disk carrier ( 4 ) is connected to one of a non-rotating or a rotating first gearbox component and the inner disk carrier ( 7 ) is connectable, via a synchronization device ( 2 ), to a rotating second gearbox component ( 3 ), and the synchronization device ( 2 ) is actuatable by a second actuator ( 13 , 18 , 27 , 33 ); and the second actuator ( 13 , 18 , 27 , 33 ) is a second actuation piston ( 18 ), axially guided by a common actuation cylinder ( 5 ), and the second actuator ( 13 , 18 , 27 , 33 ) together with a first actuation piston ( 6 ) pressurizes the inner and the outer disks ( 8 , 9 ).