Is CVT automatic or manual?

Cvt continuously variable transmission is also a kind of automatic transmission, which is a gearbox with no step difference and no fixed gear. It can be said that the motor is infinitely variable. Continuously variable transmission refers to a transmission system that can continuously obtain any transmission ratio within the transmission range. It consists of two sets of transmission wheels and a transmission belt, which is simpler in structure and smaller in size than the traditional automatic transmission.

Extended data:

CVT means that there is no specific gear, and its operation is similar to that of automatic gearbox, but the change of speed ratio is different from that of automatic gearbox, but continuous, so the power transmission is continuous and smooth.

In CVT transmission system, the traditional gear is replaced by a pair of pulleys and a steel belt. Each pulley is actually a V-shaped structure consisting of two conical disks. The engine shaft is connected with a small pulley, and the big pulley is driven by a steel belt. The mystery lies in this special pulley: the transmission pulley of CVT has a strange structure and is divided into two movable halves, which can be relatively close or separated.

The conical disk can be tightened or opened under the hydraulic thrust, and the width of the V-shaped groove can be adjusted by extruding the steel chain. When the conical disk moves inward and tightens, the steel chain will move out of the center of the circle (centrifugal direction) under the extrusion of the conical disk, and vice versa. In this way, the diameter of the disc driven by the steel chain increases and the transmission ratio changes.

References:

Baidu encyclopedia-continuously variable gearbox