Electromagnetic fuel injector

摘要

The invention provides an electromagnetic fuel injection valve comprising a movable member having a valve element adapted to come into contact with a valve seat at a tip end thereof; an anchor arranged for relative movement with respect to the movable member in a reciprocating direction; a stationary core and a yoke to form a magnetic circuit with the anchor; a coil to generate a magnetic flux in the magnetic circuit by being energized; a first spring for urging the movable member in a valve closing direction; and
a second spring for urging the anchor in a valve opening direction with an urging force smaller than that of the first spring; wherein the electromagnetic fuel injection valve further comprises a metallic cylindrical-shaped vessel including a large diameter portion and a small diameter portion which is formed integrally with the large diameter portion with same material, and the coil and the yoke are arranged on an outer circumference surface of the large diameter portion and the stationary core is arranged on an inner circumference surface of the large diameter portion, a spring seat member to constitute a spring seat for the second spring is arranged on an inner circumference surface of the metallic cylindrical-shaped vessel located on a side of the small diameter portion with respect to the stationary core and the second spring and the anchor are accommodated within a space of the metallic cylindrical-shaped vessel partitioned by the spring seat member and the anchor.