Patent ID: 8075410

Claim:
A torsional vibration damper arrangement for the drive train of a motor vehicle, the torsional vibration damper comprising: a primary side; a secondary side coupled to the primary side for rotation about an axis of rotation; a damper fluid arrangement coupling the primary side and the secondary side for relative rotation of the primary side and the secondary side with respect to each other, the damper fluid arrangement configured to transmit torque between the primary side and the secondary side, the damper fluid arrangement comprising: a first damper fluid of a first compressibility; and a second damper fluid of a second compressibility greater than the first compressibility, the second damper fluid being put under load when the pressure of the first fluid increases; and a volume containing the second damper fluid located outside the primary side and outside the secondary side, the volume being configured so that the volume does not rotate with the primary side and the secondary side around the axis of rotation.