Direct-Shift Gearbox

Encyclopedia : D : DI : DIR : Direct-Shift Gearbox

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Transmission types
Manual Automatic Tiptronic Semi-automatic Twin-clutch Gearbox Continuously-variable Derailleur gears Hub gears

The Direct-Shift Gearbox (Direktschaltgetriebe) is a dual-clutch gearbox invented by BorgWarner and initially licenced to Volkswagen (which also owns the Audi, SEAT, Bentley, Bugatti, Lamborghini and Škoda brands). By using two clutches, fast shifts can be achieved, and the inefficient torque converter of a regular automatic transmission is eliminated.

Essentially, the engine drives both clutch packs simultaneously. The outer clutch pack drives gears 1, 3, and 5 (and reverse). The inner clutch pack drives gears 2, 4, and 6. Instead of a standard large clutch plate, each clutch pack is a collection of four smaller stacked clutch plates, due to space constraints. Because the alternate clutch pack's gearing can be pre-selected, upshifts occur in an impressive 8 ms, though downshifts still take 600 to 900 ms.

VW group vehicles available in Europe with the DSG gearbox include:

• Audi Audi TT and Audi A3
• Bugatti Veyron 16.4 (* not a Borg Warner DSG, but marketed as one due to parent company)
• SEAT Altea, Toledo, and León
• Škoda Octavia
• Volkswagen Passat, Golf/GTI, Touran, Eos, and Jetta/Bora

External links

• [Direct Shift Gearbox DSG]
• [Technical explanation of manual transmissions]
• [Audi TT 3.2 DSG review]
• [Informative article from Just-Auto.com]
• [Video comparing a Golf GTI with a manual transmission and a Golf GTI with DSG]

 

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