| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injector capable of properly performing opening-closing operation of a fuel injection valve. SOLUTION: This fuel injector controls the fuel injection valve using a solenoid and a magnetostrictive element as driving force of a valve train, and has a solenoid power source 31 for driving the solenoid, a solenoid driving circuit 10 controlling current-carrying to the solenoid from the solenoid power source 31, a plurality of magnetostrictive element driving power sources 32 and 33 for driving the magnetostrictive element, and a magnetostrictive element driving circuit 20 controlling current-carrying to a magnetostrictive coil of the magnetostrictive element from the magnetostrictive element driving power sources. In valve opening operation and valve closing operation of the fuel injection valve of the fuel injector, since the plurality of magnetostrictive element driving power sources can be used, the opening-closing operation of the fuel injection valve of the fuel injector can be properly performed. COPYRIGHT: (C)2008,JPO&INPIT
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