DSG dual clutch gearbox
Function of the DSG dual clutch gearbox
Description
The vehicle is equipped with a DSG dual clutch gearbox.
The DSG dual clutch gearbox is a
gearbox which uses dual-clutch technology to change gear
automatically
. It uses a dual clutch and two gear train halves to enable very fast gear changes with
no loss of torque. The DSG dual clutch gearbox thus combines the performance and economy of a
manual gearbox with the comfort and convenience of a conventional automatic transmission.
Function
When driving, engine power is transferred to the drive axle via the gearbox. In order to change
gears, the power transmission between the engine and the gearbox has to be interrupted. This is
what the clutch is for.
With the DSG dual clutch system with its two gear train halves, the engine power is always
connected to one gear train half when driving. Before a gear change, the next higher or lower gear
is already preselected in the load-free second gear train half. The clutch on the non-driven gear is
closed and the other is opened at the same time. This is what makes very fast gear changes
possible.
Thanks to its design, the DSG dual clutch gearbox is more efficient than an automatic gearbox.
Whereas in an automatic gearbox the torque converter is constantly in use, in the DSG dual clutch
system the clutch can be opened at idling speed, thus saving fuel. Thanks to its efficiency, low
weight and intelligent control system, the DSG dual clutch system usually enables fuel
consumption equal to or lower than a manual gearbox.
However, just like the manual gearbox, the clutch in the DSG dual clutch gearbox is subject to
wear. Regular maintenance is necessary depending on the type of dual clutch gearbox DSG ;
further information
⇒
Scope of service
. In the event of a fault in one gear train half, the DSG dual
clutch gearbox also allows one gear train half to be deactivated and the journey to be continued
using the other gear train half
⇒
Troubleshooting
. If this happens, have the system checked as
soon as possible by a qualified workshop.
DSG dual clutch gearbox: selecting a gear
Fig. 123
Left-hand drive vehicles: selector lever for DSG dual clutch gearbox with lock button
(arrow). The controls are mirrored for right-hand drive vehicles
When the ignition is switched on, the selected position or gearbox programme is displayed in the
instrument cluster display.
Instrument cluster display
Serious damage to the clutch and gearbox can occur if the gear stick on the manual
gearbox is shifted to too low a gear when travelling at high speeds or at high revs. This
also applies if the clutch remains depressed and the gears do not engage.
NOTICE
Please note the following to help avoid damage and premature wear:
• Do not rest your hand on the gear lever when driving. The pressure from your hand is
passed onto the selector forks in the gearbox.
• Ensure that the vehicle has come to a full stop before engaging reverse gear.
• Always fully depress the clutch pedal when changing gear.
• Do not hold the vehicle by riding the clutch on a hill with the engine running.
NOTICE
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