Patent ID: 8027777

Claim:
A fuel supply system for supplying composite fuel containing alcohol and gasoline to a plurality of cylinders of an internal combustion engine, the composite fuel including main-fuel and sub-fuel, the sub-fuel being lower than main-fuel in concentration of alcohol, the fuel supply system comprising: a plurality of first fuel injection valves each provided correspondingly to each of the plurality of cylinders and configured to inject fuel; a plurality of second fuel injection valves each provided correspondingly to each of the plurality of cylinders and configured to inject fuel; a fuel inlet portion configured to supply at least sub-fuel to each of the plurality of first fuel injection valves and each of the plurality of second fuel injection valves; and selector control means for selecting one of main-fuel and sub-fuel supplied through the fuel inlet portion to a controlled valve, wherein the controlled valve includes each of the plurality of first fuel injection valves.