双离合变速器外文文献翻译、中英文翻译、外文翻译.doc

附录一：双离合变速器 Dual clutch transmission From Wikipedia,the free encyclopedia A dual clutch transmission,commonly abbreviated to hoop DCT (sometimes informally referred to as a twin-clutch gearbox,double clutch transmission,or similar variations there of) ,is a differing type of semi-automatic or automated manual automotive transmission. It utilises two separate clutches for odd and even gear sets. It can fundamentally be described as two separate manual transmissions(with their respective clutches)contained within one housing,and working as one unit. They are usually operated in a fully automatic mode,and many also have the ability to allow the driver to manually shift gears,albeit still carried out by the transmission’s electro-hydraulics. This type of transmission was invented by Frenchman Adolphe Kegresse just prior to World War II but he never developed a working model. The first actual DCTs arrived from Porsche in-house development,for Porsche racing cars in the 1980s,when computers to control the transmission became compact enough:the Porsche Dopel kupplung sgetribe (English:dual clutch gearbox) (PDK)used in the Porsche 956 and 962 Le Mans race cars from 1983,and the Audi Sport Quattro S1 rally car. A dual clutch transmission eliminates the torque converter as used in conventional epicyclic-geared automatic transmissions. Instead,dual clutch transmissions that are currently on the market primarily use two oil-bathed wet multi-plate clutches,similar to the clutches used in most motorcycles,though dry clutch versions are also available. The first series production road car to be fitted with a DCT was the 2003 Volkswagen Golf Mk4 R32. As of 2009,the largest number of sales of DCTs in Western Europe are by various marques of the German Volkswagen Group,though this is anticipated to lessen as other transmission makers and vehicle manufacturers make DCTs available in series production automobiles. In 2010,on BMW Canada’s website for the 3 Series Coupe,it is described bo