| 摘要 |
PROBLEM TO BE SOLVED: To stably generate a damping force by effectively suppressing the excessive increase of a damping force in a region where a piston speed is extremely high. SOLUTION: When a piston speed is 1.0m/s or more, oil liquid is caused to flow through a bypass passage 11 and a generating damping force is reduced in such a way that a bypass passage 11 and a spring valve 12 to cut off the bypass passage 11 when a piston speed is 1.0 or less and communicate the bypass passage 11 when a piston speed exceeds 1.0m/s or more are arranged in a piston rod 6. |
