Red Bull Racing do not reckon the introduction of KERS will help overtaking among the cars in Formula One next season.

The introduction of Kinetic Energy Recovery Systems is intended both to increase the chances of overtaking and also to help give the sport a 'greener' image.

KERS works by recovering energy dissipated by a car's brakes and storing it - either in a battery or via a flywheel - to provide extra bursts of power.

However, Red Bull technical director Geoff Willis is of the belief that changes also to be introduced next year which will reduce aerodynamic downforce will be the main factor in any increase in overtaking.

"I think the teams will soon learn how to use and optimise KERS, but it won't help overtaking so much," he told Autosprint. "It's a technology developed on road cars that will find a limited application in F1.

"The new aerodynamics regulations will be the biggest factor at changing racing by creating new overtaking opportunities.

"The reduction in size of the rear wing will allow the drivers to race more closely, because the loss of downforce won't be as radical while in the slipstream."