What does the engine technology CVVL mean?
3 Answers
CVVL engine refers to an engine that employs Continuous Variable Valve Lift technology. Traditional engines have fixed valve lift, but actual operating conditions require different valve lift levels, leading to certain limitations in conventional valve mechanisms. This has given rise to Variable Valve Lift (VVL) technology. Engine introduction: 1. An engine is a machine capable of converting other forms of energy into mechanical energy. Engines include internal combustion engines, external combustion engines, jet engines, electric motors, etc., applicable both as power generation devices and as entire machines including power units. 2. Engine displacement is the total working volume of all cylinders in an engine, commonly available in configurations such as 3-cylinder, 4-cylinder, 6-cylinder, 8-cylinder, 10-cylinder, and 12-cylinder.
The car I test drove last time used CVVL technology, which stands for Continuous Variable Valve Lift. Simply put, it intelligently adjusts the valve opening depth. Traditional engines have fixed valve openings, like a water pipe with only two settings—either fully open or half open. CVVL, however, can adjust continuously like a faucet, allowing the engine to breathe more smoothly at different speeds. At low speeds, it opens slightly to save fuel, while during acceleration, it opens fully to deliver maximum power. This not only improves fuel efficiency but also reduces emissions. Many domestic engines now incorporate this technology, such as the XX 1.5T model, which has been tested to be about 10% more fuel-efficient than conventional engines.
As a veteran driver with twenty years of experience, I'm particularly fond of exploring these new technologies. Simply put, CVVL makes the valves function like telescopic straws, automatically adjusting their length based on how hard you press the accelerator. During slow-moving traffic, the engine only needs to take small sips of air, much like sipping a drink through a thin straw—effort-saving and economical. But when you floor the pedal to overtake on the highway, it instantly switches to a thick straw mode, flooding the cylinders with air. The most noticeable improvements in actual driving are the extra power during acceleration and hill climbing, along with a quieter engine. However, this precision system is quite delicate and requires timely oil changes; otherwise, the hydraulic components inside can easily get stuck.
