What is the principle of CVT?
2 Answers
CVT works by using a hydraulic torque converter to generate varying levels of torque, transmitting force to achieve stepless speed variation. Here are the details: Advantages of CVT: It can maintain the engine speed and vehicle speed at an optimal transmission ratio, resulting in higher fuel efficiency. Therefore, vehicles equipped with CVT have better fuel economy. Gear shifts are exceptionally smooth, with no gear jumping during shifts or the occasional jerking sensation found in dual-clutch transmissions, making daily driving comfortable. Disadvantages of CVT: Due to structural limitations, it cannot handle high torque output. Since it uses a steel belt to transmit power, improper driving may cause the transmission to slip.
As someone who pays close attention to automotive details, the principle of CVT (Continuously Variable Transmission) is quite ingenious. Simply put, it operates using a pair of conical pulleys and a steel belt or chain. The engine connects to the input pulley, while the output pulley transmits power to the wheels. A hydraulic system adjusts the pulley spacing: when you press the accelerator to speed up, one pulley widens while the other narrows, causing the belt to shift to a new position and change the gear ratio—all without fixed gear shifts. This results in exceptionally smooth acceleration without any noticeable gear-shift jerks; at the same time, the engine can consistently operate within an efficient RPM range, delivering noticeable fuel savings. I've studied modern versions, where upgrades to the steel belt material have reduced noise and simplified maintenance. Although it has some limitations in high-torque scenarios, it’s an ideal choice for city driving, showcasing the cleverness of mechanical design. In short, CVT makes driving more comfortable and eco-friendly, and I truly appreciate this innovation.
