Hydrodynamic torque converter

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.

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. 
     
     
       26. The hydrodynamic torque converter according to claim 17, wherein the multiple damper stages include energy accumulators, the absorber masses extending radially outside of the energy accumulators. 
     
     
       27. 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 the torsional vibration absorber is 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 part of the first damper stage and an input part of the second damper stage so that the centrifugal force pendulum is parallel to both damper stages (14, 15), the centrifugal force pendulum is connected non-rotatably relative to the turbine (7) and a disk part that forms part of the interconnection between the output part of the first damper stage and an input part of the second damper stage, and wherein a mounting part (37) of the centrifugal force pendulum is disposed axially between the lock-up clutch (13) and the first damper stage (14). 
     
     
       28. The hydrodynamic torque converter according to claim 27, wherein the mounting part is connected to the disk part and a plurality of absorber masses movably mounted on the mounting part. 
     
     
       29. The hydrodynamic torque converter according to claim 28, wherein a further disk part forms the mounting part. 
     
     
       30. The hydrodynamic torque converter as recited in claim 29 wherein a limit stop for the first damper stage is provided on the further disk part. 
     
     
       31. The hydrodynamic torque converter according to claim 27, 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 centrifugal force pendulum comprises masses positioned radially outside of the fastener, and the second damper stage includes energy accumulators positioned radially outside of the fastener. 
     
     
       32. The hydrodynamic torque converter according to claim 27, wherein the centrifugal force pendulum includes masses and the multiple damper stages include energy accumulators, the masses extending radially outside of the energy accumulators. 
     
     
       33. The hydrodynamic torque converter according to claim 27, wherein a further disk part forms the mounting part of the centrifugal force pendulum, and the disk part and the further disk part together form the input part of the second damper stage. 
     
     
       34. The hydrodynamic torque converter according to claim 27, wherein the mounting part of the centrifugal force pendulum forms a single piece with the disk part (31). 
     
     
       35. The hydrodynamic torque converter according to claim 27, wherein the disk part forms an output part of the first damper stage, a further disk part forms the mounting part of the centrifugal force pendulum, and the disk part and the further disk part together form an input part of the second damper stage. 
     
     
       36. The hydrodynamic torque converter according to claim 27, wherein the disk part is a unitary structure. 
     
     
       37. 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 the torsional vibration absorber is 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 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. 
     
     
       38. The hydrodynamic torque converter according to claim 37, wherein the torsional vibration damper includes a unitary disk part that forms the interconnection between the first damper stage and the second damper stage, and wherein the centrifugal force pendulum includes a mounting part connected to the disk part and a plurality of absorber masses movably mounted on the mounting part. 
     
     
       39. The hydrodynamic torque converter according to claim 38, wherein a further disk part forms the mounting part. 
     
     
       40. The hydrodynamic torque converter according to claim 38, further comprising a fastener fixing a portion of the first damper stage to the turbine, wherein the plurality of absorber masses are positioned radially outside of the fastener, and the second damper stage includes energy accumulators positioned radially outside of the fastener. 
     
     
       41. The hydrodynamic torque converter according to claim 38, wherein the multiple damper stages include energy accumulators, the absorber masses extending radially outside of the energy accumulators. 
     
     
       42. The hydrodynamic torque converter according to claim 41, wherein the disk part forms an output part of the first damper stage. 
     
     
       43. The hydrodynamic torque converter according to claim 38, wherein the mounting part comprises a further disk part, and the disk part and the further disk part together form the input part of the second damper stage. 
     
     
       44. 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 the torsional vibration absorber is 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 a limit stop for the first damper stage is provided on a disk part connected to the centrifugal force pendulum, 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. 
     
     
       45. The hydrodynamic torque converter according to claim 44, wherein the centrifugal force pendulum includes a mounting part connected to the interconnection between the first damper stage and the second damper stage and a plurality of absorber masses movably mounted on the mounting part. 
     
     
       46. The hydrodynamic torque converter according to claim 45, wherein the disk part forms the mounting part. 
     
     
       47. The hydrodynamic torque converter according to claim 44, wherein the centrifugal force pendulum includes masses and the multiple damper stages include energy accumulators, the masses extending radially outside of the energy accumulators. 
     
     
       48. The hydrodynamic torque converter according to claim 44, wherein a mounting part of the centrifugal force pendulum forms a single piece with the disk part (31). 
     
     
       49. The hydrodynamic torque converter according to claim 44, wherein the disk part is a unitary structure.