| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve increasing joining force of a movable core and a valve member and forming a communication passage passing through a side wall and keeping communication between an inside and an outside of the valve member at low cost. SOLUTION: A slide part 33 of the valve member 30 is reciprocatably supported b an inner circumference wall 21 of a valve body 20. A side wall 32 of the valve member 30 forms an inner space 200 opening in a movable core 40 side. A movable core 40 side of the side wall 32 forming the inner space 200 is press fitted in the inner circumference wall of the movable core 40, and is joined by welding. A section where the side wall 32 is joined with the inner circumference wall of the movable core 40 is a closed cylinder over a whole circumference and constructs an annular joining part 34. The side wall 32 has notch from an upstream side of the slide part 33 over a downstream side at a position slipping in a circumference direction from a section where the slide part 33 is formed, and a communication passage 210 is formed by a notch 36. The communication passage 210 keeps communication between the inner space 210 of the valve member and an outside of the valve member 30. COPYRIGHT: (C)2006,JPO&NCIPI
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