FUEL INJECTOR

PURPOSE:To supply the fine and uniform fuel into an intake passage by forming a contraction part whose outside diameter gradally contracts toward the downstream side of the intake passage from the downstream side edge part of the expanded inclined projection part of a cone member arranged in the expanded inclined part of a fuel injection passage. CONSTITUTION:An expanded inclined part 6C whose inside diameter gradually spreads toward an opened port edge part 6B on the downstream side from an expansion starting point A of a fuel injection passage 6 is formed, and the inside diameter is spread continuously along the axis center line Y-Y in the longitudinal direction of the fuel injection passage 6. A cone member 9 arranged in the fuel injection passage 6 is constituted of an expanded inclined projection part 9A which is arranged in the expanded inclined part 6C of the fuel injection passage 6 and has an expanded part which is continuous toward the downstream side, cylindrical part 9B arranged in a fuel injection passage 6D on the upstream side from the expansion start point A, and a contraction part 9D whose outside diameter is gradually reduced toward the downstream side of an intake passage B from the downstream side edge part 9C of the expanded inclined projection part 9A.