What does VTEC mean?

[CollinLee]

VTEC is an advanced engine technology developed by Honda, and it is the world's first valve control system capable of simultaneously managing both valve opening/closing timing and lift under different conditions. Below are the specific details about VTEC: 1. VTEC stands for "Variable Valve Timing and Lift Electronic Control System" in Chinese. Compared to conventional engines, VTEC engines differ in the number of cams and rocker arms and their control methods. They feature two distinct sets of valve-driving cams for low-to-medium speed and high-speed operations, which can be automatically switched via electronic control system adjustments. 2. The working principle of VTEC is as follows: when the engine shifts from low to high speed, the computer automatically directs oil pressure to a small turbine inside the intake camshaft drive gear. Under this pressure, the small turbine rotates a certain angle relative to the gear housing, causing the camshaft to rotate forward or backward within a 60-degree range. This alters the timing of the intake valve opening, achieving continuous valve adjustment. 3. The VTEC system's modification of valve timing remains staged, meaning it changes valve timing in a jump at a certain RPM rather than continuously varying over a range of speeds.