Torsional vibration damping assembly for a drive train of a vehicle

Patent metadata

Field	Value
Publication number	US-10690218-B2
Application number	US-201616070792-A
Country	US
Kind code	B2
Filing date	Dec 19, 2016
Priority date	Jan 22, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A torsional vibration damping arrangement for a drivetrain of a vehicle comprises a rotational mass arrangement which is rotatable around a rotational axis A and a damping arrangement fixed with respect to rotation relative to the rotational axis A. A displacer unit is operatively connected to the primary inertia element on the one side and to the secondary inertia element on the other side. The damping arrangement includes a slave cylinder with a working chamber having a volume V2, and the working chamber of the slave cylinder is operatively connected to the working chamber of the displacer unit. The damping arrangement includes a stiffness arrangement and a damper mass, and the slave cylinder of the damping arrangement is operatively connected to the damper mass by a stiffness arrangement.

First claim

The invention claimed is:

1. A torsional vibration damping arrangement for a drivetrain of a vehicle, comprising:
a rotational mass arrangement rotatable around a rotational axis A;
a damping arrangement arranged outside of the rotational mass arrangement and operatively connected to the rotational mass arrangement and fixed with respect to rotation relative to the rotational axis A; the rotational mass arrangement comprising a primary inertia element rotatable around the rotational axis A and a secondary inertia element rotatable relative to the primary inertia element and further comprising a displacer unit, operatively connected to the primary inertia element on one side thereof and to the secondary inertia element on another side thereof, wherein the displacer unit comprising a working chamber, and wherein a volume V1 of the working chamber is changed through a relative rotation of the primary inertia element with respect to the secondary inertia element out of a neutral position;
the damping arrangement further comprising a slave cylinder with a working chamber having a volume V2, the working chamber of the slave cylinder operatively connected to the working chamber of the displacer unit; the damping arrangement comprising a stiffness arrangement and a damper mass, and wherein the slave cylinder of the damping arrangement is operatively connected to the damper mass by the stiffness arrangement.

2. The torsional vibration damping arrangement according to claim 1 , wherein the stiffness arrangement of the damping arrangement comprises an energy storage constructed as an elastically deformable element or a pneumatically compressible element.

3. The torsional vibration damping arrangement according to claim 1 , wherein a working medium comprising a viscous medium, or a gas, or a combination of a viscous medium and a gas is located in the working chamber of the displacer unit and in the working chamber of the slave cylinder.

4. The torsional vibration damping arrangement according to claim 1 , wherein the rotational mass arrangement comprises a fixed stiffness with an energy storage, and wherein the primary inertia element is rotatable relative to the secondary inertia element against the action of the energy storage.

5. The torsional vibration damping arrangement according to claim 4 , wherein the energy storage is arranged in parallel with or in series with the displacer unit.

6. The torsional vibration damping arrangement according to claim 4 , wherein the energy storage is an elastically deformable element or a pneumatically compressible element.

7. The torsional vibration damping arrangement according to claim 1 , wherein the working chamber of the displacer unit is operatively connected to a working chamber of the slave cylinder by a connection line.

8. The torsional vibration damping arrangement according claim 7 , wherein the connection line comprises a rotary feedthrough connecting the working chamber of the displacer unit, and the working chamber of the slave cylinder, so as to be liquid-tight and/or gas-tight so that the working chamber of the displacer unit is rotatable with respect to the working chamber of the slave cylinder.

9. The torsional vibration damping arrangement according to claim 1 , wherein the damping arrangement comprises a supply pump and/or a pressure storage and/or a control unit, and wherein the supply pump and/or the pressure storage and/or the control unit are/is operatively connected to the working chamber of the slave cylinder.

10. The torsional vibration damping arrangement according to claim 1 , wherein the slave cylinder comprises a load spring element; and wherein the load spring element acts against a working direction of a volume change V2 of the working chamber of the slave cylinder.

11. The torsional vibration damping arrangement according to claim 1 , wherein the rotational mass arrangement includes a damper subassembly, and wherein the damper subassembly is operatively connected to the primary inertia element or to the secondary inertia element.

12. The torsional vibration damping arrangement according to claim 5 , wherein the energy storage is an elastically deformable element or a pneumatically compressible element.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• ORLAMüNDER ANDREAS
• Lorenz Daniel
• Dögel Thomas
• Siemens Kyrill
• Wack Erwin
• Dieckhoff Tobias
• Terwart Markus
• Reisch Matthias
• Arzner Matthias

Classifications

• F16F15/162

  with forced fluid circulation · CPC title

• F16F15/161 Primary

  characterised by the fluid damping devices, e.g. passages, orifices (F16F15/162 takes precedence) · CPC title

• F16F7/104

  the inertia member being resiliently mounted {(F16F7/1022 takes precedence)} · CPC title

• F16F15/02 Primary

  Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06}) · CPC title

• F16F15/20

  Suppression of vibrations of rotating systems by favourable grouping or relative arrangements of the moving members of the system or systems {(F16F15/24 takes precedence)} · CPC title