Patent ID: 7677479

Claim:
A fuel injection valve comprising: a coil that is adapted to be energized to generate a magnetic field; a core that has an end portion arranged at an inner side of said coil and is magnetized by said magnetic field generated by said coil; a cylindrical body made of a magnetic material that has an end portion fixedly secured the end portion of said core; a cylindrical housing made of a magnetic material that is arranged at an outer side of said coil, and has one end portion thereof adapted to cover one axial end portion of said coil and at the same time arranged in abutment with a cylinder head of an engine; a cap made of a magnetic material that is arranged at the other end portion of said housing so as to cover the other axial end of said coil, and is in abutment at a side thereof opposite to said housing with a fastening unit; and an armature that is arranged at an inner side of said body so as to be movable for reciprocation, and is adapted to be magnetically attracted to said magnetized core; wherein a fixed connection is made either between a pair of said housing and said body, or between a pair of said cap and said core, and a first gap is formed between the other pair; and when said fuel injection valve is mounted on said engine, said housing is in abutment with said cylinder head, and said fastening unit is in abutment with said cap.