| 摘要 |
An electromagnetically driven valve includes: a valve reciprocating to and fro along a direction in which the valve shaft extends; a disk connected to the valve; a first electromagnet including a first coil; a torsion bar, which is a first elastic member; and an ECU which controls the electromagnet force of the first electromagnet. This ECU controls electrical current so as, when weakening the electromagnetic force of the first electromagnet and separating the disk from the first electromagnet, to reduce the electrical current which flows in the first coil towards zero, after having temporarily increased it from a first holding current to a second holding current which is larger than the first holding current, and then, after the disk has separated from the first electromagnet, so as to flow a braking current for adjusting the speed of the disk.
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