Patent ID: 8235154

Claim:
A drive system for a vehicle comprising: a first rotary-type internal combustion engine, wherein said first rotary-type internal combustion engine is optimized to operate on a first fuel; a first electric generator mechanically connected to said first rotary-type internal combustion engine, wherein said first electric generator is configured to produce electrical energy; a second rotary-type internal combustion engine, wherein said second rotary-type internal combustion engine is optimized to operate on a second fuel different from the first fuel; a second electric generator mechanically connected to said second rotary-type internal combustion engine, wherein said second electric generator is configured to produce electrical energy; a rechargeable electrical energy storage battery connected to said first electric generator and said second electric generator, wherein said rechargeable electrical energy storage battery is configured to selectively store the electrical energy produced by said first electric generator and by said second electric generator as directed by a power management master control computer; an electric motor electrically connected to said first electric generator, said second electric generator, and said rechargeable electrical energy storage battery; a mechanical drive train electrically connected to said electric motor configured to propel the vehicle; wherein said electrical energy produced by said first rotary-type internal combustion engine and said first electric generator is independently sufficient to power said electric motor and propel the vehicle, wherein said electrical energy produced by said second rotary-type internal combustion engine and said second electric generator is independently sufficient to power said electric motor and propel the vehicle, wherein said power management master control computer selects one of said first rotary-type internal combustion engine or said second rotary-type internal combustion engine for usage to optimize energy efficiency under an operating condition of the vehicle.