06-11-2012, 06:14 PM
Direct Shift Gearbox (DSG)
report-DSG.docx (Size: 472.62 KB / Downloads: 601)
INTRODUCTION
Thanks to the double multi-plate clutch design and different automatic gear selection programmes, DSG is well capable of meeting the high demands in comfort from drivers who favour automatic gearboxes. Furthermore, with direct selection and lightning fast, jolt-free gear changes, it also offers a high level of driving enjoyment to drivers who favour manual gearboxes. In both cases, fuel consumption is at a par with economical vehicles fitted with manual gearboxes. Currently, the world of transmission is dominated in Europe by manual gearboxes and in the USA and Japan by automatic gearboxes. Both types of gearboxes have specific advantages and disadvantages.
The advantages of a manual gearbox are, for example,
• high degree of efficiency
• robust and sporty characteristic.
The advantages of an automatic gearbox are, for example,
• a high level of comfort, above all in gear changes, as there is no interruption in tractive power.
This formed the framework for Volkswagen to combine both transmission concepts into one completely.
The twin-clutch transmission, also known as the Direct Shift Gearbox (DSG) or dual-clutch transmission, is an automated transmission that can change gears faster than any other geared transmission. Twin-clutch transmissions deliver more power and better control than a traditional automatic transmission and faster performance than a manual transmission. Originally marketed by Volkswagen as the DSG and Audi as the S-Tronic, twin-clutch transmissions are now being offered by several automakers, including Nissan, Advantages of the twin-clutch/DSG transmission. The Direct-Shift Gearbox electronically controlled dual clutch multiple-shaft manual gearbox, in a transaxle design - without a conventional clutch pedal, and with full automatic, or semi-manual control. The first actual Dual Clutch transmissions derived from Porsche in-house development for 962 racing cars in the 1980s.