Which technology is commonly used to improve fuel efficiency in modern vehicles?

Variable Valve Timing (VVT) is a critical technology utilized in modern vehicles to enhance fuel efficiency. This system allows the engine to optimize its performance across various RPM ranges by adjusting the timing of the opening and closing of the engine's intake and exhaust valves. With VVT, engines can operate more efficiently by improving combustion performance, thereby extracting more power from the fuel consumed. This adaptability leads to better fuel economy, especially under varying driving conditions, as the engine can adjust to achieve the ideal performance needed at any moment.

VVT works by altering the valve timing based on engine speed and load conditions. For example, at low RPM, the timing can be adjusted to improve torque, while at higher RPM, it can enhance power. This efficiency gains often lead to lower emissions, making VVT a popular choice in the pursuit of more environmentally friendly engine designs.

Other technologies such as turbocharging, supercharging, and cylinder deactivation also contribute to improving vehicle fuel efficiency in different ways, but VVT specifically plays a direct role in controlling valve operation, which is crucial for maximizing engine efficiency and performance over a wide range of conditions.