| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic damper for damping capable of providing satisfactory damping action in the whole vibration external force region irrespective of strength of vibration external force. SOLUTION: This hydraulic damper for damping is provided with a pilot operation control valve 20 for large load opened and operated when vibration external force by which load exceeding a set value acts is large and an opening and closing valve 30 for small load arranged in parallel with it and opened and operated when vibration external force by which load less than the set value acts is small in an oil passage for connecting both oil pressure chambers R1, R2 formed on both sides of a piston 13 reciprocating in a cylinder main body 11. Opening and closing operation of each valve 20, 30 is controlled by a control circuit ECU in accordance with vibration external force, and vibration external force is damped by flow of hydraulic fluid through each valve 20, 30. COPYRIGHT: (C)2005,JPO&NCIPI
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