Quote, originally posted by AKADriver » What's the point?
The problem that IC engines face today is not their rotational assembly, it's in the fuel used and the combustion process.
One thing that I see that's interesting is that the seals around the moving "piston" on this work like brushes in an electric motor. They wouldn't loose compression due to wear like rings do in a typical piston engine. It looks like a spring would keep constant pressure on them, and when the wearable part got low, it could be removed without taking the engine apart. The design might also reduce the friction caused by the rings for a given displacement, but it's hard to tell.
It's an interesting design exercise, even if it doesn't have a practical application IMO.