The novice is going to buy a car, but it is difficult to choose. Which is better, 7-speed DCT wet dual clutch or 6AT?

How to choose seven-speed wet dual clutch and six-speed At? The point is not to compare the gearbox, but to see which car you are going to buy and which car you are going to buy the gearbox. Isn't it putting the cart before the horse, with gearbox as the mainstay and car brand as the supplement? For example, you are going to buy Camry, and you like DCT. Because Camry has no DCT, you give up Camry? This kind of logic is very strange and does not conform to normal thinking. . .

Similarly, you like Magotan, but don't like dual clutch, so give up Magotan and choose Camry? This is also unrealistic. After all, most friends choose cars first. Even if the transmission doesn't meet their wishes, how can there be such a happy thing in the world? So the key point in choosing a car is which car to choose, not the transmission. You're driving a car, not a transmission. After choosing a car, you can use which gearbox you have!

There is a wide range of comparison between 7-speed wet dual clutch and 6AT fast wet dual clutch. For example, Porsche PDK has a wet seven-speed dual clutch, Volkswagen also has a seven-speed dual clutch, and Great Wall also has a seven-speed power shift. What kind of car do you want to buy? If you choose Porsche, please don't worry about it. PDK seven-speed dual clutch is better than any seven-speed At transmission, so you don't need to struggle at all. If you want to sell Volkswagen, then Volkswagen's seven-speed wet dual clutch is more expensive (much higher) than the six-speed At currently on the market. Volkswagen's seven-speed wet dual clutch can be compared with the mainstream eight-speed At, and now the six-speed At has been eliminated!

6At is divided into several grades as shown in the above figure, which is the product series matrix of Aisin Horizontal At. It can be clearly seen that the six-speed At-* * can be divided into three grades, below 200nm torque, below 300nm and below 500nm. In fact, in our automobile market, almost no car is equipped with 500nm six-speed At (flat knitting machine range), and most of the six-speed AT used are 200nm. The cost of this machine is already very low. There are several reasons for the low cost. First, the patent of Aisin six-speed At has expired for almost 10 years. Second, years of production and assembly, the cost is constantly diluted (this is the characteristic of industrial products). Therefore, the cost of Aisin six-speed below 200nm is not as high as that of Volkswagen dry dual clutch and Toyota's own new S-CVT!

The picture above shows the vertical At sequence of Aisin. Generally speaking, the longitudinal transmission is applied to rear wheel drive. Compared with the torque level, the cost of longitudinal transmission is much higher than that of transverse transmission. It's just that Toyota has given us too few rear wheel drives for so many years. It seems that only Crown has adopted eight-speed at, so the vertical six-speed At can only be seen on Prado. But there are too many Prado-class cars to choose from, so don't worry about anything. Therefore, from the perspective of the joint venture brand, the joint venture brand car equipped with wet seven-speed dual clutch is already higher than the car equipped with six-speed At. Do you still have to struggle? You can choose which car is of high grade!

Again, when we buy a car, we buy a car, not a gearbox. It was Porsche that made PDK, not PDK that made Porsche. Without Porsche and PDK, we will lose our souls. So before you entangle the transmission, you might as well ask yourself which car you like first, and decide the model first; From the application point of view, there is no short board in the wet dual clutch, and the gear shifting mechanism is immersed in the oil cavity, so there is no danger of overheating, so the service life of the wet dual clutch is no problem; As for performance, dual clutch is better than At in theory, but it also depends on matching and adjustment technology. Not all dual clutches have good performance!