What is the principle of a CVT transmission?

[WyattLee]

The principle of a CVT (Continuously Variable Transmission) is that it uses a drive belt and a variable-width pulley system for power transmission. When the pulley changes its groove width, it alters the contact radius of the drive belt between the driving and driven pulleys, thereby achieving variable speed. The drive belt is typically made of materials like rubber belts, metal belts, or metal chains. Below is some information about CVT transmissions: CVT usually refers to a type of automotive transmission, also known as a continuously variable transmission. The difference between a CVT and a stepped transmission is that its gear ratio is not a series of discrete points but a continuous range of values, which results in better fuel efficiency, power performance, and driving smoothness, while also reducing emissions and costs. For example, the gear ratio can vary continuously from 3.455 to 0.85. The structure of a CVT is simpler and more compact compared to traditional transmissions. It does not have the numerous gear pairs found in manual transmissions or the complex planetary gear sets in automatic transmissions. Instead, it primarily relies on the driving and driven pulleys and a metal belt to achieve continuously variable gear ratios.