Cam sixeliv free
Additionally, because there is no chain connection between the crank shaft and the camshaft, the engine is lighter with fewer points of failure.
The absence of a camshaft also means that the parasitic load on the engine is lower, which is particularly useful in large marine engines, as it can equate to a large amount of power savings.
Camshafts normally have one lobe per valve, with a fixed valve duration and lift.
The camshaft rotates at half the rate of the crankshaft.
A camless or free-valve piston engine is an engine that has poppet valves operated by means of electromagnetic, hydraulic, or pneumatic actuators instead of conventional cams.
Actuators can be used to both open and close valves, or to open valves closed by springs or other means.
With a camless engine, fuel injection and exhaust timing are directly controlled by an engine control unit and can be constantly changed and adjusted without stopping the engine.
Anyone with a basic understanding of how engines work is bound to be impressed by von Koenigsegg's latest, a camshaft-free design.Christian Koenigsegg claims in a video that the Qamfree engine with the PHEA camless technology is based on an existing Qoros engine that was "...developed in Germany and Austria five, six years ago...".Christian Koenigsegg also claims that the PHEA camless technology allows the elimination of the pre-catalytic converter, because the standard catalytic converter can be brought up to temperature quickly by manipulating the exhaust cycle.Although many modern engines use camshaft phasing, adjusting the lift and valve duration in a working engine is more difficult.
Some manufacturers use systems with more than one cam lobe, but this is still a compromise as only a few profiles can be in operation at once.Camless valve trains have long been investigated by several companies, including Renault, BMW, Fiat, Valeo, General Motors, Ricardo, Lotus Engineering, Ford, Jiangsu Gongda Power Technologies and Koenigsegg's sister company Free Valve.