| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid fuel injection valve of high performance, capable of inexpensively ensuring a sufficient magnetic circuit while miniaturizing and thinning the same. SOLUTION: A pressed fuel introduction pipe 40, a hollow cylindrical fixed core 1 having a flange at its upper edge, and a nozzle holder 18 having an orifice plate pressed into the shape of a long cylinder and having a valve seat on its lower end side are bonded by welding. An upper inner periphery of the nozzle holder 18 and an outer periphery of the fixed core 1 are welded after being press-fitted. The welded assembly has a movable core 14 and a valve element 16 connected through a joint 15 having spring function. A solenoid coil 2 is mounted on an outer periphery of the nozzle holder 18, a cylindrical yoke 4 is mounted outside of the solenoid coil, and the yoke 4 is welded and joined to the flange 1a of the fixed core 1 at its upper end, and press fitted to the outer periphery of the nozzle holder 18.
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