| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid injection nozzle capable of injecting fluid uniformly in a wide range with its configuration made simple. SOLUTION: Six injection holes 15a are formed over an injection plate 15 in such a way as to be disposed to the identical circumference around the axial line of a needle valve 20. Each injection hole 15a is formed up while being inclined by a different angle with respect to the axial line of a fuel injection valve, and as the whole, the injection holes are directed to the direction inclined with respect to the axial line of the fuel injection valve. Here in this place, the thickness of the injection hole plate is t, the diameter of each injection hole 15a is d, and the widening angle of a spray injected out of each injection hole isω. In this case, if t/d is changed, the value ofωis increased to the extent that sprays injected out of the respective injection holes 15a are overlapped with one another in a range of t/d<=1.5. At this point, the sprays of fuel are formed into a hollow circular shape in the cross section of the whole of the sprays. Therefore, atomized fuel can thereby be uniformly injected in a wide range without providing a mechanism forming a revolving flow with its configuration simplified.
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