| 摘要 |
PROBLEM TO BE SOLVED: To increase responsiveness by reducing a size by a reduction in the wall thickness of a magnetic cylindrical body in an electromagnetic fuel injection valve in which the magnetic cylindrical body is welded to a valve seat member having, at its rear end, a press-fit cylindrical part press-fitted into the front part of the magnetic cylindrical body, a valve element is stored in a valve seat member while being energized by a spring in the direction of seating on a valve seat, and a movable core having a rear end opposed to the front end of a fixed core is continuously connected coaxially with the valve element. SOLUTION: The valve seat member 10 comprises the press-fit cylindrical part 10a, a large diameter part 10b having an outer diameter roughly equal to the outer diameter of the magnetic cylindrical body 9, and an annular shoulder part 10c formed on the flat surface of the press-fit cylindrical part 10a perpendicular to the outer peripheral surface thereof and connecting the press-fit cylindrical part 10a to the large diameter part 10b. An annular contact receiving surface 9a allowing the annular shoulder part 10c to abut on the roughly entire surface thereof is formed at the front end of the magnetic cylindrical body 9 so as to define the squareness thereof to the inner peripheral surface of the magnetic cylindrical body 9, and the front end of the magnetic cylindrical body 9 and the abutted part of the valve seat member 10 are welded over all the periphery thereof. COPYRIGHT: (C)2006,JPO&NCIPI |
