Patent ID: 7559526

Claim:
A fuel injection valve comprising: a solenoid unit that includes a core, an armature and a coil; a valve unit that includes a valve element connected to said armature to travel therewith, and a valve seat that regulates a movement in valve closing direction of said valve element, as well as is open and closed by said valve element separating from or coming in contact with said valve seat, and a stopper for regulating a movement in valve opening direction of said valve element, said valve unit being connected to said solenoid unit; wherein there is provided a cavity that is at, and that is in communication with, a gap formed between said core and said armature in opposition, and said cavity forms a resonator for suppressing bounce of said valve element; wherein said cavity is formed in an internal part of said armature orthogonally to the face of said armature opposite said core, and wherein said cavity is a bottomed tubular cavity.