Force transmission device with a rotational speed adaptive damper and method for improving the damping properties

• US 8,161,740 B2
• Filed: 05/26/2010
• Issued: 04/24/2012
• Est. Priority Date: 11/29/2007
• Status: Expired

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Krause, Thorsten, Engelmann, Dominique
• Primary Examiner(s): Lazo, Thomas E
• Application Number:
  US12/800,961
• Publication Number:
  US 20100242466A1
• Time in Patent Office: 699 Days
• Field of Search: 603/38, 192/30.V
• US Class Current: 60/338
• CPC Class Codes: F16F 15/145 Masses mounted with play with respect to driving means thus enabling free movement over a limited range
• CPC Class Codes: F16F 15/167 having an inertia member, e.g. ring
• CPC Class Codes: F16H 2045/021 three chamber system, i.e. comprising a separated, closed chamber specially adapted for actuating a lock-up clutch
• CPC Class Codes: F16H 2045/0263 the damper comprising a pendulum
• CPC Class Codes: F16H 2045/0284 Multiple disk type lock-up clutch

Abstract

The invention relates to a force transmission device for power transmission between an input and an output, comprising at least an input and an output, and a vibration damping device disposed in a cavity that can be filled at least partially with an operating medium, in particular oil, the vibration damping device coupled with a rotational speed adaptive absorber, wherein the rotational speed adaptive absorber is tuned as a function of an oil influence to an effective order q_eff, which is greater by an order shift value q_F than an order q of an exciting vibration of a drive system.

Claims

1. A force transmission device for power transmission between an input and an output, comprising:

at least an input (E) and an output (A); and

a vibration damping device disposed in a cavity that can be filled at least partially with an operating medium, the vibration damping device coupled with a rotational speed adaptive absorber,

wherein the rotational speed adaptive absorber is tuned as a function of an oil influence to an effective order q_eff, which is greater by an order shift value q_F than an order q of an exciting vibration of a drive system.

2. The force transmission device according to claim 1, wherein the order shift value q_F is selected, so that a resonance of the rotational speed adaptive absorber does not coincide with the order q of the exciting vibration.

3. The force transmission device according to claim 1, wherein the effective order q_eff of the rotational speed adaptive absorber exceeds the order q of the exciting vibration of the drive by the order shift value q_F in the range of >

0.05 to 0.5.

4. The force transmission device according to claim 1, wherein the rotational speed adaptive absorber is configured as a centrifugal force pendulum device, comprising an inertial mass support device with inertial masses disposed thereon and movable relative thereto, configured and designed, so that a center of gravity distance S of a particular inertial mass is determined as a function of an order q of the exciting vibration of the drive and the order shift by q_f to an effective order q_eff defines a change of the center of gravity distance as a function of the order shift value q_f.

5. The force transmission device according to claim 1, wherein a size of the order shift value q_f changes proportional to a change of the order q of the excitation of the drive.

6. The force transmission device according to claim 1, comprising a hydrodynamic component with at least a primary shell functioning as a pump shell (P) and a secondary shell functioning as turbine shell (T) jointly forming an operating space (AR), wherein the turbine shell (T) is connected at least indirectly torque proof with the output (A) of the force transmission device and a device for bridging the hydrodynamic components, which are respectively disposed in a power path, and the device for damping vibrations is connected with the rotational speed adaptive absorber at least in series with one of the power paths, wherein a cavity which can be at least partially filled with an operating medium, is formed by an inner cavity of the force transmission device which inner cavity is flowed through by the operating medium of the hydrodynamic component.

7. The device of claim 1, wherein the operating medium is oil.

8. The force transmission device according to claim 1, wherein the effective order q_effof the rotational speed adaptive absorber exceeds the order q of the exciting vibration of the drive by the order shift value q_F in the range of >

0.05 to 0.4.

9. The force transmission device according to claim 1, wherein the effective order q_eff of the rotational speed adaptive absorber exceeds the order q of the exciting vibration of the drive by the order shift value q_F in the range of >

0.05 to 0.3.

10. The force transmission device according to claim 1, wherein the effective order q_eff of the rotational speed adaptive absorber exceeds the order q of the exciting vibration of the drive by the order shift value q_F in the range of >

0.14 to 0.3.

11. A method for improving the damping properties of a force transmission device for power transmission between an input and an output, comprising at least an input (E) and an output (A), and a vibration damping device disposed in a cavity that can be filled at least partially with an operating medium, the cavity in particular flowed through by an operating medium of a hydrodynamic component, the vibration damping device coupled with a rotational speed adaptive absorber, wherein the rotational speed adaptive absorber is tuned as a function of an oil influence to an effective order q_eff, which is greater by an order shift value q_F than an order q of an exciting vibration of a drive system.

12. The method for improving the damping properties of a force transmission device according the claim 11, comprising the following method steps:

determining the order of excitation q of a drive engine;

defining a geometry of the rotational speed adaptive absorber for the order of excitation q;

determining the required order shift value q_F; and

determining the geometry of the absorber as a function of the order shift value q_F.

13. The method of claim 11, wherein the operating medium is oil.