Volkswagen reveals 10-speed DSG gearbox
Volkswagen has displayed a new 10-speed DSG gearbox. The new gearbox, called the DQ511, is a development of the seven-speed DQ500 used in cars like the Jetta and Octavia, and is designed for a peak torque of 56.1. This new twin clutch automatic gearbox not only has two distinct clutches that allow it to change the gear faster and be more efficient, it also has the added flexibility of ten gears.
According to conventional logic, a ten speed gearbox should be larger and heavier than a seven-speed gearbox of the same design. However, the new 10-speed is no larger than the current seven-speed, and doesn't weigh more either. What's even more surprising is that the new box uses the same amount of gear sets as the seven-speed DQ500. This is done by employing an entirely new shifting strategy, so that the existing gears combine differently to form new ratios. Also, only two new additional linkages are used. This also works perfectly for VW's platform strategy as it allows the 10-speed to be seamlessly integrated into all the new VW MQB cars.
The manufacturer says it will customise ratios in tune with the cars' requirement, so you can either have densely stacked gears for strong performance, well spread out ratios for overall benefits, or even super tall ratios for ultra efficient cruising. The biggest advantage of the new gearbox is the increase in the average gear ratios over the earlier seven-speed, without any compromise in driveability. The new 10-speed DSG gearbox has an overall average ratio of 10.2 versus 7.9 for the earlier seven-speed.
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