| 摘要 |
PURPOSE:To obtain a fuel injection valve having resistance against high- temperature corrosion and sulfuric acid corrosion by forming multiple plated layers made of different materials on the flame contact section surface of a nozzle tip of a fuel injection nozzle. CONSTITUTION:In a fuel injection nozzle type A, for example, a material having high resistance against sulfuric corrosion or high-temperature corrosion is plated on the flame contact section surface of a nozzle tip to the thickness to have its characteristics as the first plated layer 4. If the first plated layer 4 is made thicker, its characteristics is decreased, thus a different material having large resistance against high-temperature resistance is plated to the thickness to have its characteristics on the first plated layer 4 as the second plated layer 5. Thereby, plated layers of different materials are formed on a base material 3 in overlap. Accordingly, a fuel injection valve having resistance against high- temperature corrosion and sulfuric corrosion can be obtained.
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