Patent ID: 7673818
Filing Date: 2010-03-09
Classification: F02M,Y10T

Abstract:
1. An electromagnetic fuel injection valve comprising a valve member which is contained in a valve housing having a valve seat at a front end thereof and is spring-biased in a direction in which said valve member is seated on said valve seat, a cylindrical movable core having a movable attraction face at a rear end thereof and coaxially connected to said valve member, a stationary core having at a front end thereof a stationary attraction face opposed to said movable attraction face, and a coil assembly for exhibiting an electromagnetic force for attracting said movable core toward said stationary core, so that the contact of said movable attraction face with said stationary attraction face is inhibited, characterized in that a ring-shaped stopper made of a material non-magnetic or magnetic weakly more than said movable core is press-fitted into an inner periphery of the rear portion of said movable core; a flat abutment face, which is disposed at a location displaced from the flat movable attraction face formed at the rear end of said movable core toward the stationary attraction face, is formed at a rear end of said stopper to be able to abut against said stationary attraction face; and a slant is formed on an inner periphery of the rear end of said movable core and an outer periphery of the rear end of said stopper to continuously and smoothly connect said movable attraction face and said abutment face to each other.