Koenigsegg Introduces Revolutionary Technology FreeValve, Or The Cylinder Head Without Camshaft
|   Friday, February 05, 2016
The future is here: engines will no longer have camshafts. The Swedes from Koenigsegg know how to make not only powerful machines capable of reaching speeds over 400 km / h but they are also innovative. The engineers from here have managed the impossible: making an engine that doesn't have overhead camshafts.

In the beginning it was to create the model CCXR, which uses not only gasoline, but also bioethanol E85, thus becoming one of the most environmentally super-car of that time.
The E85 fuel increases the performances too as a bonus.

Then there was the Triplex suspension, which gives the Koenigsegg super-car enviable stability during acceleration. For better stability a unique stabilization system has been prepared which has no counterpart among competitors.
Another resounding successful technology debuted on the model Regera. This model is not equipped with a transmission, but with a special clutch instead!

These are just some innovations that have been implemented by engineers from Koenigsegg. But one of the most interesting at which the Swedish manufacturer has worked for years, as early as 2000 by testing it on Saab models, is the revolutionary technology FreeValve, which excludes the camshaft from the cylinder head.

The cylinder head has enormous potential for improved performance. This is one of the reasons why engineers of various car manufacturers have invented variable valve management systems to achieve different parameters depending on needs. Thus systems such as VTEC (Honda), VANOS (BMW), Valvetronic (BMW) or MultiAir (Fiat) have appeared. Yet all such systems cannot provide absolute flexibility. Here intervenes the revolutionary Free Valve technology, which exclude entirely the camshaft.

In its place electro-hydraulic-pneumatic actuators were installed, for each valve individually. In this way, it ensures the opening or closing of the valves exactly when it is needed, the time of opening being indefinitely variable. The Free Valve System flexibility has no limits, which is like the Holy Grail for engine construction engineers.

With the help of Free Valve technologies they can get 30 percent more power and torque, as well as some 30 percent less fuel consumption, the emissions being reduced too. The Free Valve technology makes it possible and easier to disconnect a few cylinders; the valves can be hermetically sealed without the active cylinders working in vain.

So everything seems too good to be true, which is why problems appear too - reliability. A system that relies on pneumatic hoses and air pressure is not always reliable. The traditionally camshaft operated valves can run hundreds of thousands kilometers without any problems, without something to fail because there are no moving parts. However, the pneumatic system, has a greater risk to deteriorate. This is the main reason why currently, this type of engine is in its early draft form. But Koenigsegg has shown that it can be done.
They made a functional car that runs just like a normal car. It is only a first step, but work is done to improve the system to last in time without the need of a mechanical intervention. They are working on obtaining reliable actuators that would not break after a few thousand kilometers of running at high speed. Maybe in 10 years engines will look different than now: without camshafts, pistons or perhaps even no oil bath.
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