What is the difference between CVVT and VVT?

VVT timing variable valve control technology

CVVT continuous timing variable valve technology

CVVT has one more C than VVT, which means continuous, emphasizing the continuity of control, that is, controlling the valve according to the current engine working conditions. When the engine is running at low speed, the valve opens late to ensure full combustion; When the engine is loaded due to load climbing, the valve should be opened in advance to obtain large torque.

To put it bluntly, they are all different abbreviations of timing valve variable technology used by various manufacturers, such as CVVT of Korea, VVTI of Toyota and VTEC of Honda. The basic principle is the same. For example, Toyota's VVTI can continuously adjust valve changes according to engine conditions. On the contrary, CVVT technology is not so kind. Originally, I studied Toyota, but I studied "variable" instead of "timing", which made its engine less fuel-efficient than Toyota Honda, and added a C-continuous to its name. Shameless Korean stick.