Drive train having centrifugal pendulum

Abstract

The disclosure relates to a drive train for a motor vehicle containing an internal combustion engine, a transmission connected downstream thereof, drive wheels and a differential arranged between the drive wheels and the transmission. In order to eliminate or at least reduce the vibrational eigenmodes behind the transmission, a centrifugal pendulum is assigned adjacent to the differential.

Claims

1. A drive train for a motor vehicle comprising: an internal combustion engine, a transmission connected downstream thereof, drive wheels and a differential arranged between the drive wheels- and the transmission, wherein a centrifugal pendulum is disposed adjacent to the differential.

2. The drive train according to claim 1, wherein a drive shaft is provided between the transmission and the differential, wherein the centrifugal pendulum is arranged between the drive shaft and the differential.

3. The drive train according to claim 2, wherein the transmission is installed at a front of the motor vehicle and the drive wheels are provided for rear-wheel drive.

4. The drive train according to claim 2, wherein the centrifugal pendulum is enclosed separately from a housing of the differential by a centrifugal pendulum housing.

5. The drive train according to claim 2, wherein an articulated connection is provided between an input shaft of the differential and the drive shaft.

6. The drive train according to claim 5, wherein the centrifugal pendulum is assigned to the input shaft.

7. The drive train according to claim 5, wherein the centrifugal pendulum is assigned to the drive shaft.

8. The drive train according to claim 5, the centrifugal pendulum housing is rotatably received on the drive shaft or on the input shaft.

9. The drive train according to claim 8, wherein the centrifugal pendulum housing receives a pendulum mass carrier which is non-rotatably connected to the drive shaft or the input shaft and on which pendulum masses which can be pivoted along a predetermined pendulum path are arranged distributed over a circumference on both sides in centrifugal force field.

10. The drive train according to claim 5, wherein the centrifugal pendulum housing is outwardly supported in a non-rotatable manner.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The invention is explained in more detail with reference to the exemplary embodiment shown in FIGS. 1 and 2. Therein:

[0021] FIG. 1 shows a schematic representation of a drive train with a centrifugal pendulum received adjacent to a differential and

[0022] FIG. 2 shows a partial section through a structurally designed centrifugal pendulum from FIG. 1.

DETAILED DESCRIPTION

[0023] FIG. 1 shows a schematic representation of the drive train 1 of a motor vehicle with the front-mounted internal combustion engine 2, the front-mounted transmission 3, the drive shaft 4, the differential 5 with the input shaft 6 and the drive wheels 7 for rear-wheel drive of the motor vehicle.

[0024] The friction clutch 8 and the first torsional vibration isolation device 9—here a dual-mass flywheel connected to the crankshaft 10 of the internal combustion engine 2, optionally with a centrifugal pendulum—are arranged between the internal combustion engine 2 and the transmission 3.

[0025] The drive shaft 4 is connected to the transmission output shaft 12 of the transmission 3 by means of the articulated connection 11, such as a universal joint, for example, and to the input shaft 6 of the differential 5 by means of the articulated connection 13, such as a universal joint, for example.

[0026] The centrifugal pendulum 14 is arranged adjacent to the differential 5. For this purpose, the pendulum mass carrier 15 of the centrifugal pendulum 14 is non-rotatably connected to the input shaft 6 or to the drive shaft 4. In the exemplary embodiment shown, the pendulum mass carrier 15 is designed as a disc-like pendulum flange on which the pendulum masses 16 distributed over the circumference are arranged on both sides by means of pendulum bearings (not shown). Axially opposite pendulum masses 16 are each connected to one another by means of connecting means extending through recesses in the pendulum mass carrier 15.

[0027] The centrifugal pendulum 14 is coordinated with the eigenmodes of the differential and, if necessary taking into account the design, of the torsional vibration isolation device 9.

[0028] To protect the centrifugal pendulum 14 or the environment, to form a burst protection and the like, the centrifugal pendulum can be surrounded in a manner not shown by a protective cage or a centrifugal pendulum housing, which can be rotatably connected to the housing 17 of the differential, for example.

[0029] FIG. 2 shows a possible embodiment of the centrifugal pendulum 14 in partial section with the pendulum mass carrier 15 and the pendulum masses 16 arranged on both sides of the pendulum mass carrier 15. The centrifugal pendulum 14 is received in the centrifugal pendulum housing 18, which is received from the two housing parts 19, 20 connected to one another, for example screwed here. The centrifugal pendulum 14 can be encapsulated in the centrifugal pendulum housing 18 and operated wet, in that the centrifugal pendulum housing is at least partially filled with an operating medium, for example oil. In an alternative embodiment, the centrifugal pendulum 14 can be operated dry.

LIST OF REFERENCE NUMBERS

[0030] 1 Drive train [0031] 2 Internal combustion engine [0032] 3 Transmission [0033] 4 Drive shaft [0034] 5 Differential [0035] 6 Input shaft [0036] 7 Drive wheel [0037] 8 Friction clutch [0038] 9 Torsional vibration isolation device [0039] 10 Crankshaft [0040] 11 Articulated connection [0041] 12 Transmission output shaft [0042] 13 Articulated connection [0043] 14 Centrifugal pendulum [0044] 15 Pendulum mass carrier [0045] 16 Pendulum mass [0046] 17 Housing [0047] 18 Centrifugal pendulum housing [0048] 19 Housing part [0049] 20 Housing part