| 摘要 |
PROBLEM TO BE SOLVED: To reconcile the power saving and the seating sound reduction of an electromagnetic driving valve, as to the control device for the electromagnetic driving valve which drives to switch a valve element functioning as the intake valve or the exhaust valve of an internal combustion engine. SOLUTION: An electromagnetic driving valve 78 has an armature 92 connected to an intake valve 40, and an upper coil 98 and a lower coil 100 to operate the electromagnetic force to the armature 92, and the intake valve 40 is driven to open and close by producing a specific pattern of instruction current to the coils. In the low load rotating operation time of the internal combustion engine, an instruction current of a low seating speed pattern is used. By this pattern, the instruction current is risen to an attraction current in a rapid timing. In order to reduce the seating speed of the armature 92, the electromagnetic force is regulated by mainly the attraction current and the attraction period. In the high load operation time, an operation stabilizing pattern to increase the attraction current in the low seating speed pattern in used.
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