Red marquis: /* External links */

2009-09-27T19:07:54Z

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← Older revision		Revision as of 19:07, 27 September 2009
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	[[Category:Automotive transmission technologies]]		[[Category:Automotive transmission technologies]]
			[[Category:Transmissions]]

Red marquis at 02:37, 12 December 2006

2006-12-12T02:37:07Z

New page

{{transmission types}}
The '''Direct-Shift Gearbox''' (Direktschaltgetriebe) is a [[dual-clutch gearbox]] designed by [[BorgWarner]] and initially licenced to [[Volkswagen Group]] (which owns the [[Volkswagen]], [[Audi]], [[SEAT]], [[Bentley Motors Limited|Bentley]], [[Bugatti]], [[Lamborghini]], and [[Škoda Auto|Škoda]] brands). By using two [[clutch]]es, [[Shift Time|fast shifts]] can be achieved, and the [[torque converter]] of a regular [[automatic transmission]] is eliminated.

Essentially, the engine drives both clutch packs. 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 dry clutch, each clutch pack is a collection of four small wet interleaved clutch plates. Due to space constraints, the two clutch assemblies are concentric. Because the alternate clutch pack's gearing can be pre-selected (predictive shifts taking place while the other section is in use), un-powered time while shifting is avoided because power is simply switched from one gearbox to the other. The DSG takes about 8 milliseconds to upshift<ref name="multiple">[http://cars.about.com/od/thingsyouneedtoknow/a/ag_howDSGworks.htm How the Direct Shift Gearbox works - from About.com Cars]</ref>. Compare that to the [[sequential manual transmission|SMT]] in the [[Enzo Ferrari (car)|Enzo Ferrari]], which takes 150 ms to upshift<ref name="multiple">[http://cars.about.com/od/thingsyouneedtoknow/a/ag_howDSGworks.htm How the Direct Shift Gearbox works - from About.com Cars]</ref>. The quoted time for upshifts is only the time the engine is completely non-powered.

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

* Audi [[Audi TT|TT]] and [[Audi A3|A3]]. Audi have named the DSG "S-Tronic" in newer models.
* Bugatti [[Bugatti Veyron 16.4|Veyron 16.4]] (* not a Borg Warner DSG, but marketed as one due to parent company)
* SEAT [[SEAT Altea|Altea]], [[SEAT Toledo|Toledo]], and [[SEAT León|León]]
* Škoda [[Škoda Octavia|Octavia]]
* Volkswagen [[Volkswagen Passat|Passat]], [[Volkswagen New Beetle|New Beetle]], [[Volkswagen Golf|Golf/Rabbit/GTI/R32]], [[Volkswagen Touran|Touran]], [[Volkswagen Eos|Eos]], and [[Volkswagen Jetta|Jetta/Bora]].


==Notes==
<references />

==External links==
*[http://www.audi.com/audi/com/en1/new_cars/technology/drive___suspension/dsg.html Direct Shift Gearbox DSG]
*[http://www.autozine.org/technical_school/gearbox/tech_gear_manual.htm Technical explanation of manual transmissions]
*[http://www.vwvortex.com/artman/publish/article_317.shtml Audi TT 3.2 DSG review]
*[http://www.just-auto.com/features_detail.asp?art=1171 Informative article from Just-Auto.com]
*[http://paultan.org/archives/2006/04/25/volkswagen-dsg-direct-shift-gearbox/ Video comparing a Golf GTI with a manual transmission and a Golf GTI with DSG]
*[http://video.google.com/videoplay?docid=2491445337871038412 Audi DSG video]

[[Category:Automotive transmission technologies]]

Direct-Shift Gearbox - Revision history

Red marquis: /* External links */

Red marquis at 02:37, 12 December 2006