| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid-driven valve for improving energy efficiency. SOLUTION: This solenoid-driven valve has a valve 87 having a valve stem and reciprocating in the direction for extending the valve stem, a disc 74 being a magnetic member moving by interlocking with the valve 87, a first electromagnet including a first coil 80 and held in a valve closing position by attracting the disc 74, a torsion bar 68 being a first elastic member for adding force for separating the magnetic member from a first electromagnet to the magnetic member, and an ECU 30 for controlling magnetic force of the first electromagnet. The ECU 30 controls an electric current flowing to the first coil so as to arrange a period for flowing an electric current value between a predetermined electric current value and zero in the middle of subtracting an electric current flowing to the first coil to zero from a holding current of a predetermined electric current value when separating the disc 74 from the first electromagnet by weakening the magnetic force of the first electromagnet. COPYRIGHT: (C)2007,JPO&INPIT
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