Chery has CVT and dual clutch, why not use AT gearbox?

Turbocharged engines are developing rapidly. A lot of self-priming of many models has become a medium-displacement turbine engine. For example, Highlander cancels 2.7L self-priming, 2.0T turbine, Corolla/Racing cancels 1.6L self-priming, and continues to use 1.2T turbine. In addition, Japanese "Tian Liang Nissan Ling" and Volkswagen can be found in domestic independent brands. Why do these turbocharged cars often use dual clutch and CVT, but seldom use AT gearbox? If the turbocharged engine with partial exhaust matches the AT gearbox, it may need to pay a higher fee, and the cost is the dominant factor.

Turbocharged cars sold in China are not excluded, and there are also models using at gearbox, but the most equipped model is AWF6F 16 Essien 6AT, which is completely different from the 6AT used by Highlander and Bullying. It is reported that the maximum torque that the transmission can bear is 160N? M, low torque gearbox, basically the same as 1.6L displacement engine. It has the advantages of small size and low cost, and its cost is lower than that of dual clutch and CVT. For turbocharged engines, this 6AT matching is not enough to give full play to the power of turbocharged engines. Why is this happening? Volkswagen 1.4T turbine maximum torque 250N? M, civic 1.5T maximum torque 226N? M, civic 1.0T maximum torque 170N? M or more, domestic 1.5T maximum torque 200N? Above m.

These engines are obviously not suitable for 6AT, but advanced 6AT and 8AT are expensive, and dual clutch and CVT are more suitable. The technical threshold of AT transmission development is relatively high, limited by patents, and domestic independent brand cars and Volkswagen have also become powerless. In the field of automobiles, Japan, Germany and the United States intervened in the research in the 20th century from 65438 to 2009. Especially, there are many parts thAT can't bypass the pATent restrictions in the research of at transmission and other automobile core technologies, such as the core torque converter and planetary gear set of at transmission. The patent of hydraulic torque converter is in the hands of Japanese, and the patent of planetary gear set is in the hands of AV. Even in Cheyuquan, Toyota Aisin 6AT's "overlord medicine" is also circulating. Used in? 6AT car companies need to sign a contract with AT and cannot secretly develop AT gearbox agreement. This is also the main reason why Volkswagen and domestic independent brand cars failed to develop AT vigorously.

Domestic turbocharged vehicles are mainly equipped with dual clutch and CVT. Why is the AT gearbox rarely used? Regarding the limitation of AT transmission patent, the development of dual clutch and CVT gearbox should be relatively free. The patent protection related to the dual-clutch gearbox has expired, so almost all automobile companies can independently develop the dual-clutch gearbox. The structure of powershift is relatively simple. It is mainly composed of two sets of gearboxes and clutch packs, but the requirements for the material, control technology and cooling of dual clutch friction plates are higher. Now Volkswagen is the "most experienced" player of dual clutch, and domestic independent brands have also made good achievements in the research and development of dual clutch in recent years. BYD independently developed 6DCT, and Geely and DSI*** developed 7DCT.