| Direct-shift Gearbox |
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| CATEGORIES ABOUT DIRECT-SHIFT GEARBOX | |
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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 and Škoda brands). By using two Clutch es, fast shifts can be achieved, and the inefficient Torque Converter of a regular Automatic Transmission is eliminated. Essentially, the engine drives two 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 80 ms, though downshifts still take 600 to 900 ms. This type of transmission is finding increasing popularity in Europe , and apparently also in America although some say CVT (Continuously Variable Transmission) is more popular in the US. BorgWarner who call their technology "DualTronic" have just (Aug 2005) signed further agreements with two other (unnamed) European Automotive manufacturers to incorporate their gearbox. VW group vehicles available in Europe with the DSG gearbox include:
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