| 摘要 |
PROBLEM TO BE SOLVED: To solve such problem that machining man-hours are increased and the manufacturing cost of a fuel injection nozzle becomes high in order to dissolve the inconvenience such as the ununiform distribution of the mixture in a combustion chamber and a small flow rate coefficient, in a fuel injection nozzle providing the jet hole with a conventional mutually different slant angle on a seat surface. SOLUTION: This nozzle is constituted so that the entrance 11a of a jet hole 11 with a big slant angleβ2 against the center line O of a fuel injection nozzle 1 is arranged near the seat S of a seat surface 2a than the entrance 10a of a jet hole 10 with a small slant angleβ1 against the center line O and fuel sumps 12a, 12b are formed near the entrances 10a, 11a of the jet holes 10, 11 and the volume of the fuel sump 12b of the jet hole 11 with the big slant angleβ2 against the center line O of the fuel injection nozzle 1 is bigger than the volume of the fuel sump 12a of the jet hole 10 with the small slant angleβ1 against the center line O.
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