What is the difference between CVVT and CVT engines?

[Malia]

CVVT and CVT engines differ as follows: 1. CVT: It is a type of transmission. Directly translated, it means continuously variable transmission, which is a stepless gearbox with no specific gear positions. In operation, it is similar to an automatic transmission, but the change in speed ratio differs from the gear-shifting process of an automatic transmission—it is continuous, ensuring smooth and uninterrupted power delivery. 2. CVVT: It is a technology applied to engines. Translated into Chinese, it means continuously variable valve timing mechanism, one of the many variable valve timing technologies gradually adopted in modern cars in recent years. For example, BMW calls it Vanos, Toyota refers to it as VVTI, and Honda names it VTEC. Their goal is to match the optimal valve overlap angle (valve timing) under different engine operating conditions, although the methods of achieving this vary. 3. Commonality: Both are developed to enhance fuel economy and driving smoothness in automobiles.