| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic fuel injection valve having stability in valve assembly opening and closing attitude and good responsiveness and capable of lowering of the fuel consumption of an engine. SOLUTION: This electromagnetic fuel injection valve is provided with a valve seat member 3 having a valve seat 8, a valve housing 2 connected to one end of the valve seat member 3 at one end thereof, a fixed core 5 connected to the other end of the valve housing 2, a movable core 12 housed in the valve housing 2 freely to be slid, and a valve assembly V continuously provided to the movable core 12 through a rod part 15 and formed of the valve seat 8 and a cooperating valve part 16. The valve housing 2 is provided with a guide part 4 for supporting the valve assembly V freely to be slid in the axial direction, and the peripheral surface of the valve assembly V brought in contact with the guide part 4 is formed with a high hardness film 14 made of TiN and having Rmax 0.5-1.5μm of surface roughness.
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