Patent ID: 7849823

Claim:
An internal combustion engine operating method for obtaining motive power, comprising: storing a mixture of gasoline and ethanol in a first tank, storing water in a second tank, preparing a mixed fuel by mixing the mixture supplied from the first tank and the water supplied from the second tank in a mixing device, and supplying the mixed fuel to a combustion chamber of an internal combustion engine by use of a fuel injection valve, burning a mixed fuel in a combustion chamber of the internal combustion engine, wherein the first tank and the mixing device are connected by a first liquid feed pipe in which a first pump and a first valve are interposed, the second tank and the mixing device are connected by a second liquid feed pipe in which a second pump and a second valve are interposed, and the mixing device and the fuel injection valve are connected by a third liquid feed pipe in which a third pump and a fuel pressure adjusting valve are interposed.