Just google electromagnetic engine... Or electro... piston. That Honda robot is/was the pioneer. Till terminator scared them off.
I see the engine driving Hydraulic Vein pumps to power ANYTHING. I'm actually surprised at no responses!!! Maybe everyone is reading up?
My concept is a moving piston (1 part) forcing fluid thru check valves (2 parts), and into turbine rotors (3 parts). They could use super cooled magnets to create more energy than used, and can drive Anything from generators to scoots. To re fuel you go to the sink/ garden hose.
If in five years I see a former forum member get rich claiming the idea I will hunt down, and "reclaim" the brain that Lied!
Naw... I would rather the world, see the light more than worry about a dollar. Have at it.