| 摘要 |
The invention relates to a shift element sub-assembly for a transmission. Said sub-assembly comprises two axially adjacent shift elements (2, 3) that are located in a transmission housing (1), in addition to a common disc carrier (4) for receiving external discs (20, 21) or internal discs of both shift elements (2, 3). The discs of both shift elements (2, 3) lie axially adjacent in the interior of the disc carrier (4) and are separated from one another by a central partition (40) of said disc carrier (4). Each shift element (2, 3) has a piston (23, 33) and a closing pressure chamber (24, 34), located in the vicinity of the front faces (41, 43) of the disc carrier (4), for hydraulic actuation. According to the invention, each shift element (2, 3) has at least one resetting element (27, 37, 39) for resetting the piston, said element being located in the disc carrier (4) radially above the discs of the respective shift element (2, 3). Additionally, each shift element (2, 3) has a secondary piston (26, 36), which acts on the discs of each shift element (2, 3) in opposition to a resetting force of the resetting element (27, 37, 39) of each shift element (2, 3), by means of the piston (23, 33) of each shift element (2, 3), and at least one resetting element (27, 37, 39) of the shift element sub-assembly is configured as a drain pressure chamber (27, 37) that can be hydraulically or pneumatically actuated. |
