What does vtec mean?

Vtec is a valve control system. The following is a detailed introduction of VTEC: 1, which means "electronic control system with variable valve timing and valve lift" in Chinese. Compared with ordinary engines, VTEC engines are different in the number of cams and rocker arms and their control methods. It has two groups of different valve-driven cams, low-speed and high-speed, which can be automatically switched through the adjustment of the electronic control system. 2. The working principle of 2.VTEC is that when the engine turns from low speed to high speed, the electronic computer will automatically send oil pressure to the small turbine in the driving gear of the intake camshaft, so that the small turbine rotates at a certain angle relative to the gear housing under pressure, and the camshaft rotates forward or backward within 60 degrees, thus changing the opening time of the intake valve and continuously adjusting the valve. 3. The change of valve timing of 3.VTEC system is still phased, that is to say, the change of valve timing is only a jump at a certain speed, not a continuous change within a certain speed range.