The domestic automobile market has developed to today's point, even if the "little white" who does not understand the car can also head the road, Japanese cars have no passion to drive, the American car has many small problems, the German car transmission quality is poor, this stubborn and general view although the major car manufacturers are marked with imprecise labels, but it is not unreasonable, in a sense, this does represent public opinion, after all, the eyes of the masses are shiny! So the question is, is this really the case? Let's take the Ashkenazi public as an example to talk to you, and welcome everyone to correct what is wrong
Volkswagen in recent years the quality problems are indeed quite a lot, but for a long time by everyone complained about the reliability of the DQ200 dry dual-clutch transmission, this dry dual-clutch in the early days did focus on some problems, such as the throttle during the driving phenomenon will appear jitter, there is an obvious "click" sound when changing gears, the frustration during gear change and the braking sensation is particularly obvious..., the most obvious of which is the 2-gear refueling shake and the metal tapping sound emitted by the bumpy road section, These problems erupted in the 12 or 13 years when the DQ200 dual clutch was just released.
Why are these problems? This has to start from the principle and working mechanism of the dry double clutch, the big guy can imagine the double clutch transmission as two manual transmissions combined together, a clutch tube 1, 3, 5, 7 gears, a clutch tube 2, 4, 6 and reverse gear, when you start in 1 gear, in fact, 2 gears have been hung, but the clutch is separated and standby, the two clutches work alternately, the engine power transmission will not be interrupted when shifting, with the advantages of fast gear change and fuel saving.
But the dual-clutch transmission has a disadvantage, that is, the double-clutch transmission is more frequent, the semi-linkage time is also longer than the AT gearbox, when you are congested in the urban road, stop-and-go 2, 3 gears are frequently shifted, and the gearbox will generate a lot of heat. Wet double-clutch transmission due to the clutch soaked in the transmission oil, good heat dissipation conditions, there is no quality problem, but volkswagen's DQ200 dry dual-clutch transmission by air cooling or natural cooling, the heat dissipated is much less than the heat generated, this time it is easy to have problems.
Of course, the thermal failure is a small probability event after all, the biggest problem is that the wear rate of the clutch plate is greater than that of other automatic transmissions, other cars may take more than 100,000 kilometers to consider changing the clutch plate, and DQ200 may be 70,000 or 80,000 kilometers to change the clutch plate. And because the clutch plate wears, the surface of the tablet and the friction plate appear hard spots, and the clutch tablet and the friction plate are combined to shake. Especially in the case of traffic jams, the second gear works frequently, aggravating friction, due to the need for large torque in the starting stage, when the clutch plate is not in place, the jitter phenomenon will be very obvious.
After the quality problem, the public's solution is very rough, that is, through software, programs to adjust the control unit of the gearbox, reduce the frequency of shifting and the semi-linkage time of the clutch, the gearbox does less work, and the heat is less.
So the question is, can Volkswagen's dry dual-clutch car be bought?
Then you have to ask the owners of Langyi, Bora, Sagitar, Lingdu, Maiteng, Passat, Tuyue, Tangyue, and Tange, because the Volkswagen 1.2 and 1.4T models are equipped with DQ200 gearboxes. Millions of new owners choose Volkswagen's gearbox every year, and they have hardly heard of any major quality problems with the dry dual-clutch transmission, which is enough to explain many problems. After all, nearly ten years have passed, technology and materials have been developed to a certain extent, dry dual-clutch transmission has also developed to the fourth generation, technology has been continuously optimized, materials have also improved, reliability has not been a big problem.
In daily life, if there is no long-term traffic jam, low-speed creeping, mountain road situation, you can choose dry double clutch, as for the wet double clutch car can be bought with closed eyes. After all, the advantages of the dual-clutch transmission are indeed too prominent, the shift time, shift efficiency, smoothness, fuel economy are very good, can not because of the small probability of events to give up the real experience and feeling. And with the continuous advancement of materials, the shortcomings of the dual-clutch transmission will gradually be compensated, and I personally feel that it will become the most perfect transmission in CVT, AT, DCT \ DSG.