What is the difference between ECVT and CVT?

[Devin]

Here is a related introduction to the differences between CVT and ECVT: 1. Structural differences: The structure of CVT mainly consists of two sets of pulleys (drive pulley, driven pulley), a transmission belt (steel belt), an oil pump, a torque converter, an actuator (valve body, oil circuit), sensors, and a control computer. The composition is relatively complex, and the steel belt has limited torque capacity, so it is generally only used in small vehicles as a transmission system. The structure of ECVT is much simpler. It does not have complex mechanisms such as clutches, torque converters, or gear shaft sets found in traditional transmission systems. It consists of a set of planetary gears and two motors. 2. Different working principles: In CVT technology, Motor 2 is responsible for starting, low-speed driving, and hybrid driving; Motor 1 is mainly responsible for starting the engine and generating electricity. The engine in most cases does not directly drive the wheels. The engine is connected to the planetary carrier, Motor 1 is connected to the sun gear, Motor 2 is connected to the outer ring gear, and the outer ring gear is connected to the power output shaft. ECVT not only transmits power but also couples the energy of the engine and the motor to achieve power output, so it is actually a power combination system, specifically designed as a power distribution mechanism for hybrid vehicles. 3. Different power solutions: ECVT can also achieve continuously variable transmission by integrating motors. This transmission structure includes a planetary gear set and two motors, without a clutch or torque converter. It couples the engine's power output and provides the motor's power output through the motors. ECVT is not actually a transmission component but a power component, more accurately described as a power distributor. CVT refers to the ordinary mechanical continuously variable transmission.