The MDI Air Car adds bi-energy, increases range

The revolutionary "air car" will be available with dual engines -- the compressed air engine and an internal combustion engine working in tandem. In the city at slower speeds, it will run totally on compressed air, producing zero emmissions. The fuel engine will increase range, operating at higher speeds and recharging the air tanks. If this engine could be flex-fuel, it could easily run on Ethanol or Biodiesel.
The MDI Air Car - the world's cleanest car.:
MDI -- 2005

After twelve years of reserch and development, Guy Negre has developed an engine that could become one of the biggest technological advances of this century. Its application to CAT vehicles gives them significant economical and environmental advantages. With the incorporation of bi-energy (compressed air fuel) the CAT Vehicles have increased their driving range to close to 2000 km with zero pollution in cities and considerably reduced pollution outside urban areas.