| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device of a fuel injection device for improving responsiveness when closing a valve. SOLUTION: This control device of the fuel injection device 10 has a body connected to a supply passage of pressurized fuel and bored with a nozzle port, a needle valve movably stored to the nozzle port inside the body, a spring energizing the needle valve toward the nozzle port, an excitation coil 16 arranged in the body, and a current-carrying control means (ECU 30) moving a valve body in the valve opening direction by separating from the nozzle port by a magnetic flux generated by impressing voltage V of a power source 28a on the excitation coil 16, and has a demagnetization coil 20 for demagnetizing the magnetic flux generated by the excitation coil 16. The current-carrying control means switches current-carrying so that counter electromotive force VL1 induced by the excitation coil 16 is impressed on the demagnetization coil 20 after impressing source voltage V on the excitation coil 16. COPYRIGHT: (C)2008,JPO&INPIT
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