| 摘要 |
PROBLEM TO BE SOLVED: To improve sealability against a fuel leakage outside from a fuel holding part in comparison with a conventional fuel injection valve, maintaining knock-pin inserting operability. SOLUTION: This fuel injection valve comprises a plurality of body members 4 respectively provided with a fuel holding part 43 holding supplied fuel, formed with a knock-pin hole 45, into which a knock-pin 6 for positioning and stopping rotation in assembling is to be inserted, and formed with a peripheral seal surface 44 for sealing outward leakage of fuel in the fuel holding part 43 between the fuel holding part 43 and the knock-pin hole 45. The knock-pin 6 is inserted into the knock-pin hole 45, and the peripheral seal surfaces 44 of each of the body members are made to abut on each other, and a retaining nut 5 and an external body member 1 are fastened by screwing to form the fuel injection valve. Chamfered parts 70 and 71 of the knock-pin hole 45 are provided in a range except a fuel holding part 43 side in the shortest seal length L2 direction of the peripheral seal surface 44 connecting the fuel holding part 43 and the knock-pin hole 45 to each other. The knock-pin hole 45 is desirably formed into a thin shape communicated with outside in one part thereof. COPYRIGHT: (C)2009,JPO&INPIT
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