| 摘要 |
PROBLEM TO BE SOLVED: To realize a fuel injection system, of which handling and assembly are easy, and in which fine adjustment of injection performance after the assembly, or exchange of member is facilitated. SOLUTION: A driving portion 1 for driving a fuel injection nozzle portion 4 is constituted of a cylindrical container member 11 in which laminated piezoelectric element 61 and a piston member 62 are stored. A connector portion 7 for energization is fixed to an upper end portion of the cylindrical container member 11, and on the other hand, a lower end opening of the cylindrical member 11 is closed by a diaphragm 66. The diaphragm 66 seals the cylindrical member 11 and is displaced integrally with the driving piston 62 and transmits the displacement. Since the whole driving portion 1 is integrated, the assembly and disassembly are easy, and insulation and sealing performance are high.
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