A VVL engine is equipped with Variable Valve Lift (VVL) technology.
What Is VVL?
VVL technology allows the engine control unit (ECU) to adjust the valve lift based on the engine's operating conditions. The ECU sends commands to solenoids, which regulate oil pressure to alter the valve lift. By adjusting the valve opening size, VVL achieves an optimal air-fuel ratio for the engine. This enables the engine to meet performance demands in both high-speed and low-speed ranges, improving high-speed power and low-speed torque.
What Is a VVT Engine?
A VVT engine uses a Variable Valve Timing (VVT) system. VVT technology, through engine control units and actuators, adjusts the timing of valve opening and closing as well as the valve overlap phase. This ensures that the valve operation changes dynamically with engine speed, enhancing air intake efficiency and boosting engine power.
The ECU monitors the engine's operating conditions and sends instructions to solenoids to adjust intake volume, intake angle, and valve timing. This optimization of air intake improves combustion efficiency. The advantages of VVT engines include better fuel economy and higher specific power output, but their mid-range torque is often insufficient.
Which Is Better, VVL or VVT?
VVL technology is more advanced and complex than VVT, making it a premium feature not available to every car manufacturer. Some notable examples of variable valve lift technologies in the market include:
Honda's VTEC
BMW's Valvetronic
Infiniti's VVEL
Mitsubishi's MIVEC
While VVL offers significant improvements in both power and torque across a wider range of speeds, its sophistication also means higher production costs. If your budget allows, experiencing a car equipped with VVL technology can provide a sense of cutting-edge innovation.
In summary, VVL surpasses VVT in terms of technology and performance, but VVT remains a reliable and widely available option for enhancing fuel efficiency and power.
