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The automobile CVT can be divided into the following categories according to different Mode of action and transmission forms:
1. Friction type continuously variable transmission transmits power through contact friction between rotating bodies, continuously changing the transmission ratio by changing the radius of action of input and output. The metal belt continuously variable transmission belongs to this category.
2. The electrically driven stepless transmission is composed of a generator, a control system and a Traction motor. Its speed change principle is that the control system modulates the voltage, current or frequency output by the generator, and then transmits it to the motor to continuously change the output revolutions and torque to obtain a stepless transmission ratio. Among them, automotive clutch accessories play a crucial role.
3. There are two main ways to achieve continuously variable transmission in hydraulic transmission, namely, variable speed and volumetric variable speed. Throttling speed regulation has large overflow loss and throttling loss and low efficiency. Therefore, volume speed regulation is usually adopted.
4. Sliding clutch type continuously variable transmission, this type of continuously variable transmission is achieved through clutch "slipping". Automobile clutch accessories play a role in intermediate transmission. It can connect the clutches in series very well.