What is valvetronik?

Valvetronic is a variable valve timing system developed by BMW. It is a technology that allows engine manufacturers to significantly improve engine efficiency and performance by varying the lift of intake and exhaust valves in the engine. The system is used to control air intake into the engine by adjusting the lift of the valves with an electronically-controlled actuator, rather than using a conventional throttle. Valvetronic engines are known for their efficient fuel consumption, increased power delivery, and reduced emissions.