What is an EVT Transmission?
1 Answers
EVT transmissions are different from other types of transmissions. Below is a brief introduction to EVT transmissions. They contain at least two electric motors, three sets of planetary gears, and four electronically controlled clutches. Introduction to EVT transmissions: They can combine four fixed mechanical gear ratios, with electric motors assisting in achieving a continuously variable transmission effect between these fixed ratios. The electronic continuously variable transmission also includes high-speed and low-speed modes. The dual-mode hybrid technology incorporates more direct mechanical transmission, which improves the efficiency of the hybrid system, especially during high-speed driving, resulting in lower fuel consumption. The dual-mode hybrid system was developed by transmission engineers with minimal input from engine engineers. Therefore, it does not rely heavily on engine "cooperation" and is highly flexible, allowing integration with various vehicle models, including different drive forms, vehicle types, and body sizes. The dual-mode hybrid system uses more complex structures and control methods to enhance the efficiency of the hybrid system, ensuring fuel economy in both high-speed and low-speed conditions, and enabling broader application of hybrid technology across more vehicle models. Differences between (CVT) and electronic continuously variable transmission (EVT): Mechanical transmissions are characterized by stable rotational speed, low slip rate, reliable operation, constant power mechanical characteristics, high transmission efficiency, simple structure, easy maintenance, and relatively low cost. However, they require high precision in component machining and lubrication, have lower load capacity, and poorer overload and impact resistance, making them generally suitable for medium and small power transmissions. Electronic continuously variable transmissions feature excellent speed regulation performance, wide range, high efficiency, automatic control, compact size, and broad applicability across power ranges. Their mechanical characteristics include constant torque in the deceleration range, lower efficiency and less stable operation at low speeds, higher cost, and the need for professional maintenance.
