Patent ID: 7344093

Claim:
A fuel injection valve comprising: a stationary core; a movable core that is opposed to the stationary core; a valve member that is reciprocated together with the movable core to enable and disable injection of fuel from the fuel injection valve; a coil that generates a magnetic attractive force between the stationary core and the movable core upon energization of the coil; and a tubular member, which is formed integrally and is arranged radially inward of the coil, wherein: the tubular member covers an outer peripheral part of the stationary core and an outer peripheral part of the movable core to form a magnetic circuit in cooperation with the stationary core and the movable core and includes a magnetic member that is arranged radially outward of the movable core; an inner diameter of the tubular member decreases from a stationary core side of the tubular member, which engages the stationary core, to a movable core side of the tubular member, which is slidably engageable with the movable core; an amount of change in the inner diameter of the tubular member between the stationary core side and the movable core side of the tubular member is equal to or larger than a peripheral wall thickness of the tubular member; the stationary core includes: an opposing portion that is opposed to the movable core; and a large diameter portion that is arranged on a counter movable core side of the opposing portion, which is opposite from the movable core; an outer diameter of the large diameter portion is larger than an outer diameter of the movable core; a cross sectional area of a magnetic path of the large diameter portion is larger than that of an opposing part of the movable core, which is opposed to the stationary core; and an opposing end surface side part of the opposing portion, which is opposed to the movable core, is radially inwardly recessed relative to the large diameter portion.