| 摘要 |
A multi-stage automatic transmission comprises a drive input shaft (AN), a drive output shaft (AB), three planetary gearwheel assemblies (RS1, RS2, RS3) arranged next to one another in series and five shift control elements (A to E). A sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) can be fixed relative to a transmission housing (GG) by means of the first shift control element (A). The drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2) and can be connected via the second shift control element (B) to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) and/or via the fifth shift control element (E) to a web (ST1) of the first planetary gearwheel assembly (RS1). Alternatively, the sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) can be fixed via the third shift control element (C) and/or the web (ST1) of the first planetary gearwheel assembly (RS1) via the fourth shift control element (D) relative to the transmission housing (GG). The drive output shaft (AB) is connected to an annular gearwheel (HO1) of the first planetary gearwheel assembly (RS1) and to one of the webs (ST2, ST3) of the second or third planetary gearwheel assemblies (RS2, RS3). The second and fifth shift control elements (B, E) form a structural group, each with a disk pack (200, 500), and each with a servo device (210, 510), and with a disk support (ZYLBE) common to the two shift control elements (B, E), which forms a clutch space within which the disks (500) and the servo device (510) of the fifth shift control element are arranged. Pressure spaces (211, 511) of the servo devices (210, 510) of the second and fifth shift control elements (B, E) are separated from one another by an outer casing surface of this common disk support (ZYLBE).
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