| 摘要 |
PROBLEM TO BE SOLVED: To increase the directivity of atomization and to inject foggy fuel by forming through-holes for injecting foggy fuel in optional directions on a filter in an injection nozzle injecting the fuel through the filter. SOLUTION: A filter 11 is sealed and stuck by laser welding to the tip section of an injection nozzle fitted to a direct injection type gasoline engine chamber. The filter 11 is manufactured with a Ni alloy material by electrocasting, and a pore group 12 made of many through-holes 13 is provided nearly at the center portion of a frame 14. The pore group 12 is dotted with tens of the through holes 13 each overlapped with holes having the diameter of about 100μm staggeringly in the axial direction within a diameter of about 2 mm. The atomization directions of the through-holes 13 on the concentric circle of the pore group 12 are directed outward so that fuel is uniformly atomized in all directions.
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