| 摘要 |
PROBLEM TO BE SOLVED: To provide a control apparatus for an electromagnetically driven valve, in which an electromagnet surely attracts an armature connected to an armature shaft transmitting power between valve stems to pull the armature in the direction closing a valve element, while suppressing increase in power consumption or the like. SOLUTION: Compressed air in reservoir tank 62 is supplied to a pressure chamber of an air spring 48 for opening a valve through a check valve 65. On the other hand, the compressed air in the reservoir tank 62 through the check valve 65 and compressed air in a high-pressure reservoir tank 80 having pressure higher than the pressure of the reservoir tank 62 are selectively supplied to an air spring 46 for closing the valve by a switch valve 82. The compressed air to be supplied to the pressure chamber of the air spring 46 for closing the valve is switched to the compressed air in the high-pressure reservoir tank 80 so that the pressure in the pressure chamber of the air spring 46 for closing the valve is forcibly increased immediately before the valve element 21 is seated. COPYRIGHT: (C)2004,JPO
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