Patent ID: 7648009

Claim:
A torsional vibration damper for a bridging clutch of a hydrodynamic clutch arrangement, comprising: a drive-side damping device having a drive-side transmission element connectable to the bridging clutch, an intermediate transmission element, and a drive-side group of energy-storage devices arranged circumferentially between the drive-side transmission element and the intermediate transmission element so that the drive-side transmission element and the intermediate transmission element are rotatable relative to each other against an urgency of the drive-side group of energy-storage devices; and a takeoff-side damping device having a take off-side transmission element connected to a takeoff-side component of the clutch arrangement, the intermediate transmission element, and a takeoff-side group of energy-storage devices arranged circumferentially between the intermediate element and the takeoff-side transmission element so that the intermediate transmission element and the take off-side transmission element are rotatable relative to each other against an urgency of the takeoff-side group of energy-storage devices; and a hydrodynamic clutch device, which has at least one pump wheel and a turbine wheel to form a hydrodynamic circuit, the intermediate transmission element being connected nonrotatably to the turbine wheel and the takeoff-side transmission element being connected nonrotatably to the takeoff-side component; wherein the drive-side group of energy-storage devices has first and second energy-storage devices exhibiting a characteristic deflection curve with at least first and second sections having different deflection characteristics, and wherein the takeoff-side group of energy-storage devices has at least first and second energy-storage devices exhibiting a characteristic deflection curve with first and second sections; and wherein the stiffness of the first energy-storage devices of the drive-side group of energy-storage devices is lower than the stiffness of the first energy-storage devices of the takeoff-side group of energy-storage devices so that a predetermined stiffness ratio of the stiffness of the first energy-storage devices of the drive-side group of energy-storage devices to the stiffness of the first energy-storage devices of the takeoff-side group of energy-storage devices is established; and wherein the second section of the characteristic deflection curve of the drive-side group of energy-storage devices ends at least essentially at a torque value which is in the range of 80-100% of a torque generated by a drive of the clutch arrangement, and wherein the second section of the characteristic deflection curve of the takeoff-side group of energy-storage devices ends at a torque value which is in the range of 110-120% of the torque generated by the drive.