Internal Structure
In the M DCT, driving force is transmitted in gears 1, 3, 5, 7 and R from clutch 1 to inner input shaft 1 and sub-transmission 1.
In gears 2, 4 and 6 the driving force is transmitted from clutch 2 to inner input shaft 2 and sub-transmission 2.
| Index | Explanation |
|---|---|
| 1 | Inner input shaft 1 (top) Inner input shaft 2 (bottom) |
| 2 | Output shaft |
| 3 | Countershaft |
| 4 | Clutch 1 (top) Clutch 2 (bottom) |
Clutch 1, clutch 2, input shaft 1, input shaft 2, the countershaft and the output shaft form the total gear set of the double-clutch transmission.
| Index | Explanation |
|---|---|
| 1 | Inner input shaft 2 |
| 2 | Selector linkage |
| 3 | Intermediate case |
| 4 | Inner input shaft 1 |
| 5 | Constant |
| 6 | Output shaft |
| 7 | Countershaft |
| 8 | Lubricating pipe |
| 9 | Oil pump (sectional view) |
| 10 | External double-clutch housing (Driving force input) |
The driving force is transmitted from the dual-mass flywheel over the central input shaft and the external double-clutch housing into the M DCT. The oil pump drive gear is connected at this point to the central input shaft.
There are four hydraulically operated selector rods and four sliding clutches, with one selector rod and one sliding clutch for each gear pair 4/6, 2/R, 1/3 and 5/7. Gears 1, 2, 3 and Reverse are equipped with double taper synchronization and gears 4, 5, 6 and 7 with single taper synchronization.
Carbon friction material is used for taper friction lining on all gears. The gear set assembly is mounted on three bearings that are evenly distributed along the length of the transmission shafts.