| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of reducing driving force of an electromagnetic driving part for opening the valve. SOLUTION: This fuel injection valve has valve bodies 12 and 16 having a valve seat 14, valve elements 30 and 50 seating on and separating from the valve seat, a nozzle port 21 injecting fuel, and the electromagnetic driving parts 60 and 70 generating the driving force for electromagnetically attracting the valve elements. One end side surrounds and holds at least a partial area 53 of an anti-nozzle port side end surface part 51 on the anti-nozzle port side of the valve elements, and the other end part side has a holding member 63 surrounding and holding a predetermined surface area Dc of a fixed position holding part 64 held in a predetermined position regardless of the movement of the valve elements, and the holding member 63 expandably connects mutually opposed end surfaces of the anti-nozzle port side end surface part and the fixed position holding part. An inside area 63s surrounded between the partial area on one end side and the predetermined surface area on the other end side, is cut off so as not to receive influence of hydraulic pressure of the fuel around the inside area. COPYRIGHT: (C)2007,JPO&INPIT
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