| 摘要 |
In a fuel injection device, an injection bore plate has a first surface to which inlets of injection bores are opened and a second surface positioned on a side of a valve seat with respect to the first surface so that a step is formed between the first and second surfaces. The step serves to restrict fuel flow from the second surface so that the fuel is allowed to flow toward the injection bores in the first surface. Parallel flow of fuel causes to strengthen fuel stream and circular force is given to the fuel since the fuel hits against the step, which results in promoting atomization of fuel, even if each of the injection bores is formed simply in a column shape.
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