What is variable valve lift technology?

The basic dynamic performance of the engine depends on the air intake of the cylinder per unit time. Valve timing represents the time of valve opening, and the degree of valve opening depends on valve lift. In principle, the variable valve timing technology can improve the power performance by changing the intake air volume, but the valve timing can only advance or postpone the valve opening time, which can not effectively improve the intake air volume per unit time in the cylinder, so the help to the engine power performance is limited. If the valve lift can also be adjusted in real time according to the different working conditions and speed of the engine, then the dynamic performance of the engine under various working conditions can be improved. In this regard, many manufacturers have provided variable valve lift technology.