Thread: SMG III?
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      02-13-2006, 09:47 PM   #12
mapezzul
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Quote:
Originally Posted by E90-4life
ENHHHH!!! WRONG!!! LoL, the dual clutch gear box was actually developed by Porsche, and Porsche was the first to use it, what car? I don't know....
What are you 12? The DSG transmission was developed by AUDI/VW and Borg Warner. It is actually known as Dual Tronic by Borg Warner but marketed under the DSG nomenclature by Audi/VW. The current unit is able to be manufactured because of the joint venture. As for Porsche using it first that is farse. Historically, the first semi-automatic transmission which was marketed was the 1941 M4/Vacamatic Transmission by Chrysler. It was an early attempt at an automatic transmission that still required the use of a clutch, primarily to start and stop. Later, the Volkswagen Beetle came with an optional "Autostick", which was essentially a clutchless manual with three forward gears. Porsche and Audi have used transmissions based on similar dual clutch principles in racecars during the 1980s. Porsche's vaunted and incredibly successful 956 and 962C race cars benefited from the Porsche Dual Klutch, or PDK, transmission. In 1985, Audi itself used a dual clutch transmission in the Pike's Peak Hillclimb winning Sport quattro S1 rally car. In both instances, since dual clutch transmissions provide "shift without lift" or uninterrupted power flow to the wheels through all the gears, these transmissions were extremely well suited for keeping the racecars' turbocharged motors "on the boost." Serial production of a dual clutch or DSG transmission has been untenable to date due to insufficient means of mechanical (proper clutch actuation requires precise control of the simultaneous engagement and disengagement of the clutches), as well as electronic controls. Audi proves its technical expertise and prowess by bringing this first-ever commercial application to the streets along with Borg Warner.
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