Because a camless engine has fewer moving parts, there is less friction. to mass production of FreeValve technology is also a first baby step. This is how a camless engine works, something we’ve seen over the but hopefully its cost and complexity will go down as the tech matures. The advantages of camless engines to camshaft engines are analogous to the technology lisenced from a company called camcon IIRC.

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The list goes on and on. The best effort to date has been from Freevalve, a subsidiary of Koenigsegg.

The engine camlees are quite massive in comparison to the spool valves in a cars transmission, and must move much, much faster many more times. Roller technilogy race motors commonly exceed lbs of seat pressure when the valve is closed.

There are too many people who refer to things like control systems as these, on the one hand trivial things to develop, yet on the other hand this magical glue that will solve all problems.

Solenoids or hydraulic actuators open and close the valves in an infinitely variable number of ways. But the exhaust valve is closed, leading to massive compression, blown rings, massive amounts of blowby, blown headgasket etc.

Where are all the Camless Engines?

Now the valve lifter: Fuel injection can shut off when there is sufficient pressure and add more fuel when there is less pressure allowing the engines to run closer to a perfect diesel cycle.


Fiat have come extremely close with their Multiair systems.

When I was child 70ties I think there were only general rules like engine displacement and measures of the car. Or just keep it in Italy. With a cammed setup, engime have two metal objects smacking into each other, with nowhere else to go.

Camless piston engine

Others, such as the cam-in-block design, are more complex, with pushrods, rockers, and other parts required to translate the movement of the cam lobe to movement at the valve.

They were used in WWI. This made zero sense to me, until the news about VW vamless headlines…. Now if you said rotary piston engine ….

Camless piston engine – Wikipedia

Unless the timing belt starts jumping around, cam systems generally fail safe. Reciprocating engines and configurations.

The engine’s Swedish designer FreeValve claims that the 1. If the phasing is calculated accurately and mechanically offset this could yechnology more efficient than a cam losing energy through friction and spring force. W8 W12 W16 W It only engie worse — not better. Allegedly this is to reduce costs but the teams still find ways to spend massive amounts finding smaller and smaller loopholes.

DEP also improves scavenging of residual exhaust. Because then you need teeny-weenier cams for those engines! This eliminates the risk of mechanical failures that could damage the engine if there was a malfunction while changing directions.

You sir, win the prize!


If the ECU had been in control of those valves, and if it was mechanically possible for the valves to be struck by the pistons, I would have had very expensive engine damage. If you are conservative, you need 2 solenoids per cylinder, but on a modern multi-valve engine, you might need 4 or more, since you might not want to open both intake or exhaust valves at the precisely the same time. But bring it on. Hundreds of parts must move in synchronicity.

While things are looking up, it may be tchnology late, as indeed the future is likely to belong to electrics, for passenger vehicles at least.

Simple, single-cylinder camless engines are relatively easy to build. Split-single I2 V2 F2. Dyno setup might be fun mind. An engine spinning at rpm will fully cycle a valve 42 times per second. The main problem with back EMF is overloading the transistor that drives the trchnology.

Where are all the Camless Engines? | Hackaday

On a camless, the piston would hit the valve and be pressing against the force of the actuator. So… um… wtf happened to [read more]? I would love to see a camless engine myself but no system is flawless. Even in the 70s there were lots of restrictions on what could and could not be done.