DSG Automatic Gearboxes
How does it work?
DSG is a groundbreaking ‘two-in-one’ concept. Available in 6-speed and 7-speed versions, it’s totally unlike a conventional automatic transmission. Twin electronically controlled shafts manage gear selection, always anticipating your next shift.
When you turn the engine on and select Drive mode, one shaft selects first gear while the second shaft puts the next gear on ‘standby’. As the gearbox changes to second, the second shaft is engaged and the original shaft reaches third. As you shift upwards the sequence continues in a series of seamless moves. Because power is simply switched from one shaft to another, not only are gearshifts silky smooth, but they are also very fast: each change takes less than four-hundredths of a second.
And if you want to take over, you can control the DSG manually. Nudge the Tiptronic gearlever forwards or backwards to change gear, or use the paddle shifts mounted on the steering wheel*: left for down, right for up.
Thanks to the dual-clutch design the DSG is more efficient than conventional automatic transmission. This efficiency, together with its low weight and intelligent control, means that DSG can achieve the same, and in some instances better, fuel consumption, than a manual gearbox or even lower, depending on the style of driving.
Mechatronics – electronics and mechanics in one unit
Clutches and gearbox units are operated hydraulically by the gearbox mechatronics (a combination of mechanics and electronics) housed in the DSG. The electronic transmission control unit, sensors and hydraulic control unit form one compact unit.
The control unit does the thinking for you, using information such as engine speed, road speed, accelerator position and driving mode to select the optimum gear and to determine the ideal shift point. The hydraulic control unit then implements the shift commands in a sequence of precisely co-ordinated actions.
When one gear is engaged, another gear is always preselected. Within four hundredths of a second after the system detects a gear change it opens one clutch and closes the other. The mechatronics unit ensures that this takes place fast and to a level of accuracy that would not be possible in a manual transmission. The change of gear is imperceptible to the driver who is merely conscious of the uninterrupted power.
Comitted to the future
We at JT Automatics, have undergone the training program necessary to become approved LUK DSG clutch installers. DSG gearboxes are the new generation of vehicle transmissions. Here at JT Automatics we are committed to keeping up with todays technological advances in our industry, and the DSG is here to stay.
We have invested the time and money necessary to keep us at the forefront of this technology, and be able to offer our customers the very best service in this new and modern era of automatic gearboxes.