| 摘要 |
A vibration damper for vehicles is disclosed with a variable damping force. The vibration damper includes two series-connected damping valve systems which effect a damping force variation by means of a blockable bypass passage. An externally influenceable damping force in at least three stages is obtained in that the bypass passage bridges the two series-connected damping valve systems. This bypass passage has outer passages which open into the chambers separated by the damping valve arrangement and a further intermediate passage which opens to a space between the damping valve systems. At least two passages are closable to change the damping of damping fluid displaced between said chambers.
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