Patent ID: 7225788

Claim:
A fuel supply system of a vehicle including a fuel tank disposed at a level substantially lower than that of a carburetor combined with an engine, the fuel supply system comprising: a vacuum fuel cut valve capable of being opened by negative pressure to supply fuel to the carburetor, the vacuum fuel cut valve being disposed on an upper surface of the fuel tank; a pulse-driven fuel pump driven by negative pressure pulse for supplying fuel to the carburetor from the fuel tank, the pulse-driven fuel pump being disposed on the upper surface of the fuel tank; and a fuel suction pipe for suctioning the fuel in an upward direction from the fuel tank, the fuel suction pipe extending from the upper surface of the fuel tank downward in the fuel tank, wherein the vacuum fuel cut valve has a vacuum chamber connected to a vacuum source in the engine for opening the vacuum fuel cut valve, and the pulse-driven fuel pump has a vacuum chamber connected to the vacuum source in the engine for driving the pulse-driven fuel pump.