| 摘要 |
In the present invention, injection holes 13 are formed so as to satisfy a relationship γamin ≥ θa1 + θa2 + 0.5 × P0.6, where: γamin (deg) is an inter-injection-hole angle of two injection holes (13) of a combination, from among all combinations of two injection holes (13), having a minimum inter-injection-hole angle, which is an angle formed between central axes (Ac1) of the holes when offset so that the central axes (Ac1) overlap at an entrance opening (131); θa1 and θa2 (deg) are, respectively, taper angles that are angles formed by a contour of an injection hole inner wall (133) in a cross-section based on a virtual plane including the central axes (Ac1) of each of the injection holes (13) at which the inter-injection-hole angle is minimum; and P (MPa) is the mean pressure of fuel in a fuel passage (100) when fuel is injected from the injection holes (13). |
