| 摘要 |
PROBLEM TO BE SOLVED: To provide a method in which an operation amplitude of an additive force generating vibration is adapted to an operation condition of a valve and a mechanical characteristic of an individual valve, and also to provide a solenoid valve. SOLUTION: In this method, a friction reducing operation is adapted in a valve assembly having a movable element 8 in supporting devices 14 and 16 for establishing an opening degree of the valve 44. The friction reducing operation includes vibration of the element 8 for changing the opening degree of the valve 4 in response to a braking force having a known maximum amplitude provided for the element 8. A temporary variable of a parameter indicating the opening degree of the valve 44 is monitored during a measuring period of a plurality of individual braking forces having different maximum amplitude. An operation amplitude of the braking forces is derived at the maximum amplitude for minimizing the monitored variable, and the known maximum amplitude is set at the operation amplitude. COPYRIGHT: (C)2003,JPO
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