| 摘要 |
PROBLEM TO BE SOLVED: To prevent large liquid droplets hardly vaporized from being generated within atomized spray at the initial time of fuel injection by unifying a size of fuel particles within the spray at the initial time of fuel injection.SOLUTION: A nozzle plate 3 for a fuel injection device is arranged in opposition to a fuel injection port of the fuel injection device and is formed with a nozzle hole 6 for passing fuel injected from the fuel injection port. This nozzle plate 3 for the fuel injection device has the nozzle hole 6 of which shape of a fuel flowing-in side opening end 6a is circular and this is connected to the fuel injection port through fuel guide grooves 15, 16. In addition, the fuel guide grooves 15, 16 show that a groove width at an opening part 20 for the nozzle hole 6 is smaller than a hole diameter of the nozzle hole 6, one [21] of a pair of opposing groove side walls 21, 22 is formed to extend in a tangential direction of the nozzle hole 6, then fuel is directly flowed into the nozzle hole 6 to cause a helical fuel flow to be generated in the nozzle hole 6.SELECTED DRAWING: Figure 3 |
