dual-clutch gearbox referred to as DCT, English called Dual Clutch Transmission, Chinese translation should be “direct shift gearbox”, because it has two sets of clutch, so there are a lot of people simply called it dual clutch transmission.
noun 1. dual-clutch gearbox interpretation
referred to as the DSG dual-clutch gearbox or DCT, English called Dual Clutch Transmission, Chinese translation should be “direct shift gearbox”, because it has two sets of clutch, so there are a lot of people simply called it dual clutch transmission.
Origins 2 dual-clutch gearbox
origin dual-clutch gearbox from motor racing, it is the first practical application of the Porsche Porsche 962C in the early 1980s and Audi Audi sport quattro S1 RC 1985 year after the race, but because of the durability, etc. after more than ten years of improvement, really it has been applied by ordinary production car. Today DSG technology has 20 years of history, the technology is already very mature.
3. The dual-clutch gearbox Technical characteristics
combines a dual-clutch gearbox and an automatic manual gearbox the advantage of the transmission, a torque converter is not used, instead using two sets of clutch work alternately by the two clutches, without a gap to reach the effect of shifting. The two clutch gears and the even control the odd gears, that is, before the shift specifically, the DSG has been previously engaged gear to the next gear after the shift to give instructions, the DSG issues a command to the engine quickly, the engine speed increases, At this time, the gear previously engaged bound rapidly, while the first set of clutch completely open, complete a upshift operation, this operation lateranalogy.
Since there is no torque converter, the power of the engine can be fully realized, while two clutch work alternately, such that the shift time is very short, the power of the engine fault will be very limited. As the driver of our most immediate impression is that the switching action is extremely rapid and smooth gear, power transmission almost without interruption, the dynamic performance of the vehicle can be fully realized. Compared with the conventional automatic transmission using a torque converter, since the DSG shift more direct, less power loss, so that fuel consumption can be reduced 10% or more.
4. The dual-clutch gearbox type
● wet dual clutch
Wet double clutch is a double clutch means is large and small multi-plate clutch coaxially mounted together in two groups, which are mounted in a closed hydraulic fluid filled in the oil chamber, and therefore the structure has a better wet clutch adjustment capability and excellent thermal resistance, it can be transmitted Comparative large torque.
● dry dual clutch
It is in fact the basis of technical wet double-clutch six-speed DQ250 on development from a simplified coherent liquid power system.
It works, for a dual clutch coaxially similar size stacked clutch plate 3 is mounted, is located on both sides of the two clutch plates are connected to 1,3,5,7 gears and 2, 4,6, reverse, moving the intermediate plate therebetween, respectively, and two clutch plates “binding” or “isolated” by switching to a shift. Because this “The dual clutch “transmissions was not as DQ250 mounted in a sealed oil chamber, the dry friction plate on the movable plate can be certainly bonded to each other to bring the most direct transfer efficiency, but it is also easier to heat, so that hot melt inferior wet clutch, so as to withstand the torque would be relatively small to withstand the maximum speed of .7 DQ200 torque 250 Nm, generally with the use of small-displacement engines.
[ 123] 5 disadvantages. dual-clutch gearbox
the advantage of higher power transmission efficiency coherent disadvantage is the complex structure, high cost manufacturing stage.