Direct-shift gearbox
| Automotive transmissions |
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| Manual |
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| Automatic / Semi-automatic |
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A direct-shift gearbox (DSG, German: Direktschaltgetriebe[1])[2][3] is an electronically controlled, dual-clutch,[2] multiple-shaft, automatic gearbox, in either a transaxle or traditional transmission layout (depending on engine/drive configuration), with automated clutch operation, and with fully-automatic[2] or semi-manual gear selection. The first dual-clutch transmissions were derived from Porsche in-house development for the Porsche 962 in the 1980s.
In simple terms, a DSG automates two separate "manual" gearboxes (and clutches) contained within one housing and working as one unit.[2][3][4] It was designed by BorgWarner and is licensed to the Volkswagen Group, with support by IAV GmbH. By using two independent clutches,[2][4] a DSG can achieve faster shift times[2][4] and eliminates the torque converter of a conventional epicyclic automatic transmission.[2]
- ^ Volkswagen Service Training Manual 308 - 02E 6-speed DSG
- ^ a b c d e f g "Volkswagen DSG - World's first dual-clutch gearbox in a production car". Volkswagen-Media-Services.com (Press release). Volkswagen Group / Volkswagen AG. 22 November 2002. Archived from the original on 24 May 2006. Retrieved 30 October 2009.
- ^ a b "Twin Clutch / Direct Shift Gearbox (DSG) - What it is, how it works". Cars.About.com. Archived from the original on 7 July 2011. Retrieved 27 October 2009.
- ^ a b c "How the Dual Clutch Transmission Works". DCTfacts.com. The Lubrizol Corporation. 2009. Archived from the original on 17 September 2009. Retrieved 27 October 2009.