| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve of which movable core has high durability and which has light weight and high responsiveness. SOLUTION: The movable core 40 is integrally formed so as to be jointless and to have a cylindrical shape with approximately uniform thickness. An end part in a fixed core 33 side of the movable core 40 is folded back to have a double cylindrical shape. Thereby, in the end part in the fixed core 33 side of the movable core 40, the cross section is increased and strength is improved. Therefore, even when the movable core 40 repeatedly collides with the fixed core 33 due to operation, the strength of the movable core 40 is secured, and durability is improved. In addition, since the movable core 40 is thin, the weight of the movable core 40 can be reduced. As a result, operation responsiveness of the movable core 40 with respect to current-carrying to a coil 31 is improved. COPYRIGHT: (C)2006,JPO&NCIPI
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