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

Patent metadata

Field	Value
Publication number	US-RE48949-E
Application number	US-201715495094-A
Country	US
Kind code	E1
Filing date	Apr 24, 2017
Priority date	Nov 29, 2007
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

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 qeff, which is greater by an order shift value qF than an order q of an exciting vibration of a drive system.

First claim

What is claimed is:

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 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 0.4.

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.

14. A force transmission device, comprised of a torque converter, for power transmission between an input and an output, comprising:
at least an input (E) and an output (A); a lock-up clutch; 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 in the form of a centrifugal force pendulum, the rotational speed adaptive absorber being positioned after the vibration damping device in the force flow direction, 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, wherein the operating medium is oil and the oil influence is that of rotating oil in the cavity, which is flowed through with oil, on an inertial mass of the rotational speed adaptive absorber, wherein the effective order q eff of the rotational speed adaptive absorber exceeds the order q of the exciting vibration of the drive system by the order shift value q F in the range of >0.05 to 0.5, and wherein the order shift value q F is approximately 0.14, and the order q of the exciting vibration is 2.0.

15. A method for improving the damping properties of a force transmission device, comprised of a torque converter, for power transmission between an input and an output, comprising at least an input (E) and an output (A),
a lock-up clutch; 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, in the form of a centrifugal force pendulum, wherein the method includes tuning the rotational speed adaptive absorber 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, wherein the rotational speed adaptive absorber is positioned after the vibration damping device in the force flow direction, wherein the operating medium is oil and the oil influence is that of rotating oil in the cavity on an inertial mass of the rotational speed adaptive absorber, wherein the method includes making the effective order q eff of the rotational speed adaptive absorber exceed the order q of the exciting vibration of the drive system by the order shift value q F in the range of >0.05 to 0.5, and wherein the order shift value q F is app

Assignees

• Schaeffler Technologies Ag

Inventors

• Krause Thorsten
• Engelmann Dominique

Classifications

• F16H2045/0284

  Multiple disk type lock-up clutch · CPC title

• F16H2045/0263

  the damper comprising a pendulum · CPC title

• F16F15/167

  having an inertia member, e.g. ring · CPC title

• F16H2045/021

  three chamber system, i.e. comprising a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16F15/145 Primary

  Masses mounted with play with respect to driving means thus enabling free movement over a limited range · CPC title