| 摘要 |
PROBLEM TO BE SOLVED: To provide a stress reduction structure of a high-pressure oil feed passage intersection part 31 in a fuel injection valve, reducing stress generated in the intersection part 31 to an annular pressure lead-in chamber 19 from an oil feed passage 18 feeding high-pressure oil to prevent fuel leakage, and capable of securing durability to pressure amplitude or pressure vibration in the intersection part 31 accompanying fuel injection. SOLUTION: This stress reduction structure has an eccentric structure in a relative position between the annular pressure lead-in chamber 19 and the oil feed passage 18 in the high-pressure oil feed passage intersection part 31. In the fuel injection valve, the oil feed passage 18 feeding the high-pressure fuel into a control pressure chamber 17 is communicated with the pressure lead-in chamber 19 via the intersection part 31, and the pressure of the control chamber 17 is controlled to open and close an injection hole by a nozzle needle. The oil feed passage 18 is located in a direction offset from a direction heading for a centerline 19C of the pressure lead-in chamber 19.
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