[Occasionally6]

Re supercharging, there truly is little that hasn't been tried before:

Supercharger Air Hybrid Vehicle

and this:

http://speedzzter.blogspot.com.au/20...ercharger.html

http://wardsauto.com/ar/compressed_air_engines_090223

http://www.idsc.ethz.ch/Research_Guz...ic_Powertrain/