The difference between at car and cvt and dct.

The gearbox is a device to change the speed ratio and the direction of movement. It is used in automobiles, tractors, ships, machine tools and various machines to change the torque, rotational speed and motion direction transmitted from the driving shaft to the driven shaft according to different working conditions.

automatic gearbox has become the mainstream in the world, mainly including AT, AMT, CVT and DCT.

the primary transmission system of at gearbox is 4AT, which develops in many directions, such as 6AT and 8AT. AT has the characteristics of smooth shifting, good comfort and strong power transmission ability, but its fuel economy is poor and its manufacturing cost is high. ?

AMT is based on the traditional manual transmission, only changing the manual operation part, and realizing automatic shifting through the electronic control automatic control system. AMT has simple structure, low cost and good fuel economy, but its comfort is poor and automatic control is difficult.

CVT is a real continuously variable transmission, which has the advantages of few parts, small size, high efficiency and low fuel consumption, and can also be used as a power coupling and transmission to match with hybrid vehicles. However, it has some disadvantages, such as complex manufacturing, large investment, easy damage of transmission belt and short service life.

DCT adopts the structure of two clutches, and the shift process is similar to AT. DCT inherits the advantages of manual transmission, such as good fuel economy, high quality, etc. There is no power interruption in the shift process, and the shift comfort is good. [3]?

IVT has been actively researched and developed by many companies or has been industrialized, which may become a new development direction in the future. ?

above content reference: Baidu encyclopedia-gearbox