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Direct-shift gearbox
A direct-shift gearbox (DSG, German: Direktschaltgetriebe) is an electronically controlled, dual-clutch, 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 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. It was designed by BorgWarner and is licensed to the Volkswagen Group, with support by IAV GmbH.[citation needed] By using two independent clutches, a DSG can achieve faster shift times and eliminates the torque converter of a conventional epicyclic automatic transmission.
At the time of launch in 2003, it became the world's first automated dual-clutch transmission in a series-production car, in the German-market Volkswagen Golf Mk4 R32, and shortly afterwards worldwide, in the original Audi TT 3.2. and the 2004+ New Beetle TDI. For the first few years of production, this original DSG transmission was only available in transversely oriented front-engine, front-wheel-drive and Haldex Traction-based four-wheel-drive vehicle layouts. All transverse DSG have an internal code starting with DQ (German: DSG quer, English: DSG transverse) and are coupled to the engine via a dual-mass flywheel.
DQ250
The first DSG transaxle that went into production for the Volkswagen Group mainstream marques had six forward speeds (and one reverse) and used wet/submerged multi-plate clutch packs (Volkswagen Group internal code: DQ250, parts code prefix: 02E, 0D9). It has been paired to engines with up to 350 N⋅m (260 lb⋅ft) of torque. The two-wheel-drive version weighs 93 kg (205 lb). It is manufactured at Volkswagen Group's Kassel plant, with a daily production output of 1,500 units.
DQ200
At the start of 2008, another world-first 70 kg (150 lb) seven-speed DSG transaxle (Volkswagen Group internal code: DQ200, parts code prefix: 0AM, 0CW) became available. It differs from the six-speed DSG, in that it uses two single-plate dry clutches (of similar diameter). This clutch pack was designed by LuK Clutch Systems, Gmbh. This seven-speed DSG is used in smaller front-wheel-drive cars with smaller-displacement engines with lower torque outputs, such as the Volkswagen Golf Mk6, Volkswagen Polo Mk5, and the new SEAT Ibiza. It has been paired to engines with up to 250 N⋅m (180 lb⋅ft). This new DQ200 uses just 1 litre of specialised DSG fluid for the hydraulics and 1.7 litres of gearbox oil. In contrast, the DSG gearboxes with wet clutches use 7 litres (5.5 litres for a service) for both hydraulics and gearbox lubrication.
DQ200e
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Direct-shift gearbox AI simulator
(@Direct-shift gearbox_simulator)
Direct-shift gearbox
A direct-shift gearbox (DSG, German: Direktschaltgetriebe) is an electronically controlled, dual-clutch, 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 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. It was designed by BorgWarner and is licensed to the Volkswagen Group, with support by IAV GmbH.[citation needed] By using two independent clutches, a DSG can achieve faster shift times and eliminates the torque converter of a conventional epicyclic automatic transmission.
At the time of launch in 2003, it became the world's first automated dual-clutch transmission in a series-production car, in the German-market Volkswagen Golf Mk4 R32, and shortly afterwards worldwide, in the original Audi TT 3.2. and the 2004+ New Beetle TDI. For the first few years of production, this original DSG transmission was only available in transversely oriented front-engine, front-wheel-drive and Haldex Traction-based four-wheel-drive vehicle layouts. All transverse DSG have an internal code starting with DQ (German: DSG quer, English: DSG transverse) and are coupled to the engine via a dual-mass flywheel.
DQ250
The first DSG transaxle that went into production for the Volkswagen Group mainstream marques had six forward speeds (and one reverse) and used wet/submerged multi-plate clutch packs (Volkswagen Group internal code: DQ250, parts code prefix: 02E, 0D9). It has been paired to engines with up to 350 N⋅m (260 lb⋅ft) of torque. The two-wheel-drive version weighs 93 kg (205 lb). It is manufactured at Volkswagen Group's Kassel plant, with a daily production output of 1,500 units.
DQ200
At the start of 2008, another world-first 70 kg (150 lb) seven-speed DSG transaxle (Volkswagen Group internal code: DQ200, parts code prefix: 0AM, 0CW) became available. It differs from the six-speed DSG, in that it uses two single-plate dry clutches (of similar diameter). This clutch pack was designed by LuK Clutch Systems, Gmbh. This seven-speed DSG is used in smaller front-wheel-drive cars with smaller-displacement engines with lower torque outputs, such as the Volkswagen Golf Mk6, Volkswagen Polo Mk5, and the new SEAT Ibiza. It has been paired to engines with up to 250 N⋅m (180 lb⋅ft). This new DQ200 uses just 1 litre of specialised DSG fluid for the hydraulics and 1.7 litres of gearbox oil. In contrast, the DSG gearboxes with wet clutches use 7 litres (5.5 litres for a service) for both hydraulics and gearbox lubrication.
DQ200e