Fuel injection valve for internal combustion engine

Abstract

In a fuel injection valve, it is intended to enhance valve-closing responsivity while maintaining durability (anti wear property) of a collision portion between a stationary core and a movable core and valve-opening responsivity. An annular end faceA of the movable corein the fuel injection valve is provided with a collision portionC that collides to a stationary corewhen the movable core is magnetically attracted toward the stationary core side and a non-collision portion that keeps a fluid gap between both cores at an area of an outer side or an inner side from the collision portion. The annular end faces of the stationary core and the movable core are coated with platingshaving anti wear property, and at least one of the platings of the stationary core and the movable core is formed in such a manner that the thickness thereof at the collision portionC is to be thicker and the thickness thereof at the non-collision portion is to be thinner.