Automatically Shifted Manual Transmission/Transaxle: Description and Operation

Notes on 6 Spd. Direct Shift Automatic Transmission 02E, 02E, 6 SPD. DSG A/T

Comprehensive information on 6 Spd. Direct Shift Automatic Transmission 02E is given in the self-study program.

Transmission
The 6 Speed Direct Shift Automatic Transmission 02E is also called a double-clutch transmission. The engine torque is initiated via the dual-mass flywheel into the transmission. The transmission is built up like a 6-speed manual transmission. By alternating the sequence of the hydraulic activation of two multi-plate wet clutches, it is operated like an automatic transmission. That means the speeds are selected automatically or manually via a Tiptronic mode. A clutch pedal is not installed.

Safety functions of transmission control module
If one or more components or sensors fail the Transmission Control Module (TCM) -J217- activates the corresponding functions or emergency programs. This ensures a transmission operation without damage which could have effects on gearshift function and quality.

Selector lever
The selector lever position is not transmitted mechanically to the transmission as it occurs in the automatic transmission via the selector lever cable and the multifunction switch (driving range sensor). The selector lever positions or the gear selection are transmitted via an own control module in the selector lever via the can bus to the transmission control module. The gear changes occurs without a cable. Only in selector lever position "P" the selector lever cable is used to engage the parking lock mechanically.

Gear change point variations for hills
An additional gear change map automatically selects gear changes for hills dependent upon accelerator pedal position and driving speed.
^ Gear change map for extreme uphill stretches is matched to engine output.
^ Gear change map for extreme downhill stretches is matched to braking effect of the engine.
^ By selecting a gear directly via Tiptronic the engine braking effect can be exploited also with a specific gear selected, e.g. when there are hills in the trailer mode.