| 摘要 |
PURPOSE:To improve comfortableness of a car to ride in and its driving stability at a high speed and prevent collision with the bottom, by providing parallelly arranged two sets of extension and compression side damper valves and constituting each valve such that a communicated passage to an oil chamber is opened and closed by a selector valve responsively operated to a piston position detector spring. CONSTITUTION:When a car is empty, an average stroke of a piston 2 is located in an upper position, and a spool 29 of a selector valve 30 is not acted by a piston position detector spring 14, then the valve 30 fully opens a bypass passage 28. Under this condition, at action of extension and compression sides, the first and second damper valves 21-24 are communicated to an upper oil chamber 4 and bottom oil chamber 5 to generate damping force. When the car is loaded, the average stroke of the piston 2 is placed to a lower position, and the spring 14 is acted on the spool 29 to cause the valve 30 to close the passage 28. In this way, the second damper valves 23, 24 are arranged inoperative only the first valves 21, 22 are operated to display large damping force. Thus comfortableness of the car to ride in and its driving stability can be improved to prevent collision with the bottom. |
