No, its not more efficient. Its FAR LESS efficient.

Battery-generated electricity is far, far, far more expensive by joule than combustion of any kind - two stroke or four, gas or diesel.

Its NOT cleaner. As long as its lead-free (and for the last 60 years all fuel are led free) the emission is water and carbon dioxide (plant food) and soot (also sort of plant food).

What kinda "inventor" are you?