What does VTEC engine mean?

[LeMalachi]

VTEC engine refers to an advanced engine technology developed by Honda, which is a valve control system capable of simultaneously managing both valve opening/closing timing and lift under different conditions. Relevant information about VTEC engines is as follows: Working principle of the engine: The VTEC engine is indirectly mechanically controlled by the ECU through multiple sets of camshafts and rocker arms. When continuous variable timing cannot be achieved, it operates the engine in different cycle modes by altering valve lift and phase. Function of the engine: With the VTEC system, the engine can automatically adjust valve opening duration and lift according to driving conditions, thereby modifying intake and exhaust volumes. This reduces fuel consumption and, to some extent, minimizes unnecessary emissions.