this nonsense will require valve springs so weak that they won't seal the cylinders; or electromagnetism innovations that are currently off-the-scale to overcome valve-spring tension requirments.
You will see engines with this system on the road in the same dream as you see cars with hydrogen fuel.
Using rotory valves instead of poppet valves would eliminate this issue, no?
A company here in CO has had a camless engines for at least 10 years already.
Sturman Industries in Woodland Park modifed everything from VW diesels to Caterpiller diesels to Ford Powerstrokes, and had running prototypes years ago.
"this nonsense will require valve springs so weak that they won't seal the cylinders; or electromagnetism innovations that are currently off-the-scale to overcome valve-spring tension requirments.
You will see engines with this system on the road in the same dream as you see cars with hydrogen fuel."
That would be my guess too, even in the picture the size of the two driver coils looks huge.
As far as the impracticality of hydrogen fuels, don't get me started. I have a mechanical engineering degree and actually turn a wrench on occasion, and most of these green utopia ideas just don't pass the laugh test.
The illustration shows springs of different lengths and probably strengths; likely, the design is intended to damp oscillations inherent in coil springs at high deflection speeds.
Still, you bring up a good point.
As an old time drag racer, valve float is remembered all too well.