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1、附 录附录A 外文文献原文Introduce dual-clutch automatic transmissionThe clutch is located in engine and transmission between engine and transmission power transfer switch, it is a kind already can transmit power, and can cut off power transmission mechanism. Its major functions is to guarantee the car can smoo
2、th start, variable speed change Block transmission gears when reduce the impact load and prevent transmission overload. In general bus, auto shift by clutch separation and joints when, in separation and realize between mating have power transfer temporary interruption phenomenon. In the ordinary bus
3、 no effect, but the clock in your car, if the clutch master bad power behind the speed will slow, affect scores.In order to solve this problem, the early 1980s, the automotive engineering will make a double clutch system transmission, abbreviation vehicles.the (English name: Direct Shift Gearbox), a
4、ssembly on the car, can eliminate shifting clutch of power transfer stagnation phenomenon. For example BuJiaDi EBl6.4 Veyron new 7 speed transmission is the device for double clutch, from a gear change to another gear, time cant exceed 0.2 seconds. Now, the double clutch has been applied to general
5、from racing cars. Audi car companys new audi TT sports car and the new audi A3 have device the vehicles.the. These car assembly vehicles.the purpose is can more smoothly than automatic transmission gear shift, wont have hysteresis phenomenon.Double on-off gearbox (DCT) also called directly shift gea
6、rbox (vehicles.the). Count down it also has the nearly 70 years of history, but for a very long time and this gearbox are unknown, and the genuine used in mass production car is not long ago things. Double on-off gearbox advantages obviously, but its internal structure by comparison is very complica
7、ted. First of all it has two clutches respectively by electronic control and push by hydraulic system, and two clutches corresponding two groups of planetary gear transmission, so also corresponding complex is divided into two parts, the center of solid shaft is responsible for a set of gear, and ho
8、llow shaft responsible for another group. Visible double re-rotating the internal structure of the almost overturned thoroughly traditional gearbox form.The working principle of double on-off gearbox can be simple understanding for a clutch corresponding odd block, another clutch corresponding even
9、block. When the vehicle hangs in a block, another clutch and corresponding next shift has been located in preparation condition, when Former gears separation is immediately jointing next shift gearbox, accordingly double on-off shift speed than the average gearbox even manual gearbox faster. Besides
10、 double on-off gearbox although internal complex, but the actual volume and weight compared with automatic transmission character and not how much more than manual gearbox, therefore equipment double on-off gearbox models not smooth too burdensome for himself.At present domestic in the sale equipmen
11、t double on-off gearbox models numbered, representative is public its Wallace GTI, EOS leaps, and still cool and equipped with double on-off gearbox soar team and loungyee will also listed in the near future. In addition S40 also have double Volvo re-rotating version. And many of the cars are porsch
12、e adopted dual on-off gearbox.Audi the double clutch system transmission is a whole, there have been six gear, clutch and transmission assembly at the same facility, two clutch cooperate each other work. This good metaphor a car had two sets of clutch, are driver control a set, vice driver control a
13、nother set. Are the driver hang 1 file loosen clutch pedal started, the deputy drivers advance hang pot 2 but trample clutch pedal, When the speed up ready to shift and are driver trample clutch pedal while vice driver namely loosen clutch pedal, second gear began to work. Thus omitted rotary-switch
14、ing empty flash, continuous power transfer, and a bit like the relay race. Double clutch system two sets of clutch transmission system, through computer control coordination work.When the automobile driving in a normal, a clutch and transmission of a gear are linked together, the engine power transf
15、er to the drive wheels, Computer based on the speed and speed for driver shifting intention judgement, foresight to control another clutch with another gear gears connected, but only is in the ready state, has not yet connected with engine power. Shift when first clutch disconnect, at the same time
16、the first 2 clutch will have connected gears and engine joint. Besides, a clutch except gap is closed, another clutch is in the open.Two root transmission shaft respectively by first and second clutch to control and engine power connection and disconnected, are respectively responsible for 1, 3, 5 files and 2, 4 and 6 shifting gear transform. Considering the parts service life, the designer chose tanker diaphragm type clutch, clutch action by the hydraulic system to contr
