| 摘要 |
A cylinder injection type fuel injection valve 1 has a valve body 10 of a hollow cylindrical shape, a valve seat 12 having a fuel injection nozzle 11 at its center, which is disposed at an end of the valve body 10, a hollow housing 2 having an end connected to the valve body, which is capable of coming to contact with and separating from the valve seat 12 so as to open and close the injection nozzle 11, a core 3 disposed in the housing 2 and a coil assembly 4 disposed around the core 3 and inside the housing to cause opening and closing operations of the valve body 10, wherein an O-ring 14 is fitted to a space defined by the housing 2 and the core 3, in which the coil assembly 4 is disposed, at a side to which a fuel pressure is applied, so that the pressure is not applied to the coil assembly, or wherein a sealing ring having a hollow cylindrical shape 17 is fitted to a space defined by the housing 2 and the core 3, in which the coil assembly 4 is disposed, at a side to which a fuel pressure is applied, and an O-ring 18 is disposed at each side of the inside and the outside of the sealing ring 17.
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