| 摘要 |
PROBLEM TO BE SOLVED: To enable the atomization of fuel injected to be promoted. SOLUTION: A plurality of nozzle hole groups 22, 23, 24, 25, 26 and 27 which make injection stream of fuel collide together ahead of injecting direction are provided on a nozzle plate 18, and a dimension proportion t/d, where (t) is a plate thickness of the nozzle plate 18 and (d) is a hole diameter of nozzle holes 21A and 21B constituting each of nozzle groups 22 to 27, is set to meet a relation defined as t/d≥1.0. Consequently, a longitudinal dimension L of the nozzle holes 21A and 21B provided by passing through the nozzle plate 18 can be enlarged, and when the fuel is injected from each of nozzle holes 21A and 21B, direct advancing property of the injection stream can be secured. Therefore, the atomization of fuel can be promoted by making the injection stream of the fuel injected from the nozzle hole 21A and 21B of each of the nozzle hole groups 22 to 27 suitably collide ahead of the injecting direction. COPYRIGHT: (C)2004,JPO
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