VALVETRONIC is BMW's patented fully variable valve control system that eliminates the need for conventional throttles. (press.bmwgroup.com)
The Valvematic system offers continuous adjustment to lift volume and timing and improves fuel efficiency by controlling the fuel / air mixture using valve control rather than conventional throttle plate control. (en.wikipedia.org)
The biggest change, philosophically, is the addition of Valvetronic, which, you'll remember, is BMW's infinitely variable intake valve lift system that eliminates the need for a conventional throttle. (automobilemag.com)