Koenigsegg Subsidiary Shows Camless Engine – Freevalve G6 Rrail
A new kind of engine is being showcased by Freevalve, a subsidiary of supercar maker, Koenigsegg. The company has released a video of its engine that comes without camshafts. The result of this is increased low end torque and power, decreased fuel consumption and less CO2 emissions.
The Freevalve concept is also known as fully variable valve actuation. As mentioned, it has no camshafts but instead uses electronically-controlled pneumatic valve actuators controlled by air pressure or springs to open and close each valve.
Said system allows each valve to be controlled individually, giving it variable valve lift that differs from standard camshaft-driven engines. That said, cylinder deactivation is also possible, and is much easier compared to conventional mills.
The system, which offers full control of both valve timing and lift, utilises proprietary valve position sensors. These sensors allow the system to know the valve position within 1/10 of a millimetre in real time.
Should the actuator fail, the company says that the engine will still run as normal, albeit with slightly reduced high rpm power. Furthermore, in this case, Freevalve says that the engine will still be able to provide limp-home capability even if 75% of the actuators fail.
Uniquely, the company claims that should the system fail entirely, the engine will stop without any damage done to the engine. Regular camshaft engines, meanwhile, are likely to suffer significant damage or may even be wrecked should the timing belt or chain break.
As for fuel consumption, Freevalve states that it offers “diesel-like” fuel consumption. It’s said to be 30% more fuel efficient than a comparable conventional engine. Power-wise, the engine is said to make 30% more power and torque as well. It’s still a work in progress, as the company is still looking into noise, reliability and refinement aspects of the engine.
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