Patent ID: 7441753

Claim:
A carburetor, comprising: a base, having a center flow path with an air inlet port and an air outlet port respectively disposed on two ends thereof, wherein the base defines a supporting portion on one side of the air inlet port, the supporting portion and the base are forming an annular exit for the main oil path therebetween; a Venturi cone assembly, mounted in the center flow path and including a fixing axle and a cone, wherein the fixing axle is fixed on the supporting portion and the cone movably is shafted via the fixing axle; a cam assembly, including a cam spindle, a cam, and a connecting board, wherein the cam spindle is pivotedly mounted close to a center of the base, the cam and the connecting board are respectively mounted inside and outside the base and connect with the cam spindle, and the cam abuts against the Venturi cone assembly; a horsepower adjustment assembly, including a fixed shaft for a fan blade, a fan blade, and an oil line rotation wheel, wherein the fixed shaft for a fan blade is pivotedly mounted on the base close to the air outlet port on the same side as the cam assembly, the fan blade and the oil line rotation wheel are respectively mounted inside and outside the base and connect with the fixed shaft for a fan blade; and a vacuum horsepower adjustment valve, mounted on a top of the base and including a vacuum valve cover and an auxiliary oil needle, a film placed between the vacuum valve cover and the base wherein the film connects with the auxiliary oil needle, and the auxiliary oil needle vertically penetrates through the base and movably extends into the center flow path.