US Patent 7677043 Steam powered hybrid vehicle

The idea within the scope of the present invention is for a vehicle to be driven by an electric motor. An external combustion engine drive a generator which supplies electricity for the electric motor. Surplus energy is stored in the batteries. The external combustion engine would be a preferred gasoline or diesel fueled steam engine. Steam is probably the best currently understood technology for the engine of the present invention. The combination use of steam and electric has advantages. A steam engine takes time to build pressure in a boiler before it can produce power. During this time the batteries will power the electric motor. The system of the present invention overcomes the problem of limited range in a pure electric powered vehicle, inefficiency of an internal combustion powered vehicle and long startup problems of pure steam driven vehicles. The present invention does not require a whole new fuel delivery infrastructure like a hydrogen fuel cell does.