Hydrodynamic torque converter

Patent metadata

Field	Value
Publication number	US-RE48872-E
Application number	US-200915704477-A
Country	US
Kind code	E1
Filing date	Jun 12, 2009
Priority date	Jul 4, 2008
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

The invention relates to a hydrodynamic torque converter having an impeller wheel, a turbine wheel and an oscillation damper which is accommodated in the converter housing, and a converter lockup clutch. Two damper stages are arranged here as a serial damper between the output hub of the torque converter and the converter lockup clutch, and a damper stage is arranged between the turbine wheel and the output hub. In order to improve the damping properties, a rotary oscillation absorber is additionally provided which is arranged between the dampers and is also connected to the turbine wheel in a rotationally fixed fashion.

First claim

What is claimed is:

1. A hydrodynamic torque converter ( 1 ) with a turbine ( 7 ) driven by an impeller ( 6 ) as well as housing ( 3 ) in which a torsional vibration damper ( 16 ) with multiple of damper stages ( 14 , 15 ), a torsional vibration absorber ( 17 ) and a lock-up clutch ( 13 ) are additionally installed, wherein a first damper stage ( 14 ) and a second damper stage ( 15 ) are disposed between the lock-up clutch ( 13 ) and an output hub ( 12 ), the second damper stage ( 15 ) is disposed between the turbine ( 7 ) and the output hub ( 12 ) and the torsional vibration absorber ( 17 ) is parallel to both damper stages ( 14 , 15 ).

2. The hydrodynamic torque converter ( 1 ) according to claim 1 , wherein an input part ( 41 ) of the first damper stage ( 14 ) and an output part ( 48 ) of the second damper stage ( 15 ) are centered on one another.

3. The hydrodynamic torque converter ( 1 ) according to claim 1 , wherein a disk part ( 25 ) is allocated to two damper stages ( 14 , 15 ) as one piece.

4. The hydrodynamic torque converter ( 1 ) according to claim 1 , wherein the torsional vibration absorber ( 17 ) comprises a plurality of absorber masses ( 39 ), and a mounting part ( 37 ) of the torsional vibration absorber ( 17 ) forms a disk part ( 31 ) of an input part ( 35 ) of the second damper stage ( 15 ).

5. The hydrodynamic torque converter ( 1 ) according to claim 1 , wherein absorber masses ( 39 ) of the torsional vibration absorber ( 17 ) and energy accumulators ( 29 ) of the first damper stage ( 14 ) disposed over the circumference are radially at the same height but axially spaced apart.

6. The hydrodynamic torque converter ( 1 ) according to claim 5 , wherein a middle mounting diameter of the energy accumulators ( 29 ) is disposed radially outside the turbine ( 7 ).

7. The hydrodynamic torque converter ( 1 ) according to claim 5 , wherein the energy accumulators ( 29 ) overlap the turbine ( 7 ) at least partially and axially.

8. The hydrodynamic torque converter ( 1 ) according to claim 1 , wherein energy accumulators ( 27 ) are distributed over the circumference of the second damper stage ( 15 ) based on a middle mounting diameter radially within turbine blades ( 8 ) of the turbine ( 7 ).

9. The hydrodynamic torque converter ( 1 ) according to claim 8 , wherein the energy accumulators ( 27 ) of the second damper stage ( 15 ) and the turbine ( 7 ) at least partially and axially overlap.

10. The hydrodynamic torque converter ( 1 ) according to claim 1 , wherein the lock-up clutch ( 13 ) in a closed state is axially mounted in a pocket ( 24 ) formed in a housing wall ( 23 ) radially inward of fastening means ( 9 ) provided on external part of the torque converter ( 1 ).

11. The hydrodynamic torque converter ( 1 ) according to claim 10 , wherein the lock-up clutch ( 13 ) is formed out of a piston ( 18 ) centered on the output hub ( 12 ) and mounted non-rotatably and axially displacably on the housing ( 3 ), and axially pressurizes a friction plate ( 22 ) that can be clamped between said piston and said housing ( 3 ) to develop a frictional engagement.

12. The hydrodynamic torque converter ( 1 ) according to claim 11 , wherein a mounting part ( 37 ) of the torsional vibration absorber ( 17 ) is disposed axially between lock-up clutch ( 13 ) and the first damper stage ( 14 ).

13. The hydrodynamic torque converter ( 1 ) according to claim 12 , wherein between the friction plate ( 22 ) and an input part ( 41 ) of the first damper stage ( 14 ) transition connections ( 44 ) are formed, which reach through circular segment-shaped openings ( 47 ) of the mounting part ( 37 ).

14. The hydrodynamic torque converter according to claim 1 , wherein in the closed state of the lock-up clutch ( 13 ) the torsional vibration absorber ( 17 ) acts between both damper stages ( 14 , 15 ).

15. The hydrodynamic torque converter according to claim 1 , wherein the torsional vibration absorber ( 17 ) is connected non-rotatably with the turbine ( 7 ).

16. The hydrodynamic torque converter according to claim 15 , wherein in the opened state of the lock-up clutch ( 13 ) the torsional vibration absorber ( 17 ) is connected non-rotatably with the turbine ( 7 ).

17. A hydrodynamic torque converter (1) with a turbine (7), driven by an impeller (6), as well as housing (3) in which a torsional vibration damper (16) with multiple damper stages (14, 15), a torsional vibration absorber (17) and a lock-up clutch (13) are additionally installed, wherein the torsional vibration absorber includes a centrifugal force pendulum, wherein a first damper stage (14) and a second damper stage (15) of the multiple damper stages are disposed between the lock-up clutch (13) and an output hub (12), the second damper stage (15) is disposed between the turbine (7) and the output hub (12) and the centrifugal force pendulum is connected to an interconnection between an output of the first damper stage and an input of the second damper stage so that the centrifugal force pendulum is parallel to both damper stages (14, 15), wherein the centrifugal force pendulum is connected non-rotatably relative to the turbine (7) and a disk part that forms the interconnection between the input part of the second damper stage and the output part of the first damper stage, wherein the centrifugal force pendulum comprises a plurality of absorber masses (39) and a mounting part (37), and wherein the mounting part forms part of the disk part with the input part (35) of the second damper stage (15).

18. The hydrodynamic torque converter (1) according to claim 17, wherein the disk part that connects the first and second damper stages (14, 15) is a single piece.

19. The hydrodynamic torque converter (1) according to claim 17, wherein the torsional vibration damper comprises energy accumulators (29) for the first damper stage (14), and the absorber masses and the energy accumulators are disposed over a circumference radially at a same height and axially spaced apart.

20. The hydrodynamic torque converter (1) according to claim 17, wherein the mounting part (37) of the centrifugal force pendulum is disposed axially between the lock-up clutch (13) and the first damper stage (14).

21. The hydrodynamic torque converter according to claim 17, wherein in a closed state of the lock-up clutch (13) torque flows through the first damper stage and the second damper stage such that the centrifugal force pendulum acts on both damper stages (14, 15), and wherein in an open state of the lockup clutch, torque flows through only the second damper stage such that the centrifugal force pendulum acts only on the second damper stage.

22. The hydrodynamic torque converter according to claim 17, wherein a further disk part connected to the disk part forms a mounting part of the centrifugal force pendulum.

23. The hydrodynamic torque converter according to claim 17, wherein the disk part forms at least an output of the first damper.

24. The hydrodynamic torque converter as recited in claim 17, wherein a limit stop for the second damper stage is provided on the disk part.

25. The hydrodynamic torque converter according to claim 17, further comprising a fastener fixing a portion of at least one of the first damper stage and the second damper stage to the turbine, wherein the absorber masses are positioned radially outside of the fastener, and the second damper stage includes energy accumulators positioned radially outside of the fastener.

Assignees

• Schaeffler Technologies Ag

Inventors

• Magerkurth Heiko
• Huegel Christian
• Meissner Andreas

Classifications

• F16H2045/0226

  comprising two or more vibration dampers · CPC title

• F16H2045/0205

  two chamber system, i.e. without a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16F15/12366

  acting on multiple sets of springs · CPC title

• F16H2045/0278

  comprising only two co-acting friction surfaces · CPC title

• F16H45/02 Primary

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title