Direct-shift gearbox
Type of dual-clutch transmission / From Wikipedia, the free encyclopedia
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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.[citation needed] 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]