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Ängelholm - For over 100 years, the principle of the four-stroke engine has not changed. The movement of the crankshaft is transmitted via a timing belt, a timing chain or a vertical shaft to one or more camshafts. Often drives an intermediate shaft oil pump or distributor, rarely balancer shafts reduce vibrations of the engine. All versions, the mechanical connection between the individual shafts have in common.
The Koenigsegg now wants hats. Christian von Koenigsegg, founder and CEO of the Swedish sports car manufacturer shows in a video to the development of the Free-valve technology. The valves are controlled electrically and by air. Thus, the system completely avoids camshafts. The engine damage prevented by technical defects, increases performance and reduces fuel consumption.
On Technology: Christian von Koenigsegg with an activator for a valve. On Technology: Christian von Koenigsegg with an activator for a valve. Source: Youtube
Free-valve technology: Operation
Controlling a plurality of valves by means of a cam shaft is replaced by the free-valve technology. Each valve will have its own activator, the opening timing, duration and lift can implement individually. The valves are no longer tied to the geometry of the cams. They open and close faster than a mechanical drive. Cumbersome implemented systems such as variable valve timing and cylinder deactivation can be programmed easily, if a valve is to be closed, it will not be activated if it is open longer, the signal is adjusted.
Follow from this enormous environmental benefits. The engine loses the belt and valve train performance with little friction. Only the light engine has a mechanical connection to the engine, all the other units are electrically driven. According to Koenigsegg, performance may increase by up to 30 percent, the demand drops, ideally by the same amount.
