Patent ID: 7306169

Claim:
A fuel injection valve for an internal combustion engine comprising: a needle valve having a seat contact section at a leading end of the needle valve; and a nozzle body that includes a tapered surface having a seat section with which said seat contact section comes into contact and a predetermined area that is provided downstream of said seat section, and a fuel receiver section, which is formed by a sack wall surface that is positioned downstream of said tapered surface; wherein said leading end of said needle valve includes a first protrusion that is adjacent downstream to said seat contact section and tapered to have a greater taper angle than said tapered surface; and a second protrusion that protrudes downstream from said first protrusion and is formed so that the outermost protrusion end is positioned downstream of the intersection of the axis line of said needle valve and a virtual plane that is extended from an inclined surface of said first protrusion; wherein said second protrusion is tapered to have a smaller taper angle than said first protrusion; and wherein the vertical cross-section of a joint between said first protrusion and said second protrusion is curved.