| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel supply device of high reliability by significantly reducing noise.SOLUTION: A fuel pump is composed of a pump base having a fuel suction port and a fuel discharge port, and an impeller having a plurality of impeller blades pressurizing a fuel sucked from the fuel suction port of the pump base by rotation, and delivering the fuel from the fuel discharge port. A relationship of an angle &thetas;1 formed by OA and OB, and an angle &thetas;2 formed by OC and OD satisfies "&thetas;1+&thetas;2=360°/number of sheets of blades", on the impeller blade, a point intersecting with the fuel discharge port of the pump base first is A, and a point intersecting with the fuel discharge port of the pump base last is B, and on the fuel discharge port of the pump base, a point intersecting with the impeller blade first is C, a point intersecting with the impeller blade last is D, and further a rotation center of the impeller is O. |
