FUEL INJECTOR

PURPOSE:To prevent the gulfing-up of fuel and permit the uniform injection of fuel by jetting the fuel jetted from a fuel injection valve toward a cone member in a fuel injection passage and jetting the fuel into a suction passage through a spread inclined shaped annular gap and forming a contraction part at the edge part on the downstream side edge part of a spread inclined projection part. CONSTITUTION:On an injection valve body 4 arranged under a throttle valve body 1, a fuel injection passage 6 which has the axis center line Y-Y on the axis center line X-X of a suction passage B and whose downstream side is opened toward the inside a suction passage B through an opened port edge part 6B is formed, and a spread inclined part 6C is formed towards the opened edge part 6B from an expansion starting point A. Further, a fuel injection valve injection passage 7 for jetting the fuel jetted from a fuel injection valve 5 into the fuel injection passage 6 is formed. A cone member 8 is arranged in the expansion inclined part 6C, and an annular gap which is formed downward from an expansion inclined projection part 8A and the spread inclined part 6C. A contaction part 8D whose outside diameter gradually reduces toward the downstream side is continuously installed on the downstream side edge part 8C of the spread inclined projection part 8A, and the gulfing-up of the jetted fuel inwardly to the downstream side edge part 8C is prevented.