DE102015205885A1 - Dual mass flywheel with primary and secondary starter - Google Patents

Abstract

In a torque transmission device in the drive train of a motor vehicle comprising a dual mass flywheel with a primary side and a secondary side, which are rotatable relative to each other against the force of an energy storage, and a starter, which is connectable for starting an engine coupled to the torque transmitting device with this, becomes an unacceptably large Twisting of the primary side against the secondary side during starting avoided by both the primary side and the secondary side are connectable to the starter.

Description

The invention relates to a torque transmission device in the drive train of a motor vehicle comprising a dual mass flywheel with a primary side and a secondary side, which are rotatable relative to each other against the force of an energy storage device, and a starter, which is connectable for starting an engine coupled to the torque transmitting device with this.

Dual mass flywheels (ZMS) are from the prior art, for example from the DE 41 17 582 A1 , known. These are used as vibration absorbers for torsional vibrations (torsional vibrations) in drive trains of motor vehicles, wherein the dual mass flywheel is usually arranged between the crankshaft of an internal combustion engine driving the motor vehicle and a vehicle clutch upstream of the transmission. By against spring force as an energy storage and possibly also against dry friction relative to each other rotatable primary flywheel and secondary flywheel torsional vibrations, which are caused by the non-uniform drive torque of the usually designed as a piston engine internal combustion engine, redeemed.

The starting process of the internal combustion engine is carried out via an electrically operated starter. This drives a sprocket seated on the primary side of the dual-mass flywheel via a starter pinion that can be engaged and disengaged. During the starting process, a resonance area must be passed through. The dual mass flywheel can swing up very high. If impacts occur, the primary side can be twisted so strongly relative to the secondary side that the dual-mass flywheel is damaged.

An object of the invention is therefore to provide a torque transmission device in which a resonance range can be traversed in the starting process without the occurrence of unacceptably large angles of rotation, so that damage to the dual mass flywheel is avoided when passing through the resonance range.

This problem is solved by a torque transmission device according to claim 1. Preferred embodiments, refinements or developments of the invention are specified in the dependent claims.

The above-mentioned problem is in particular solved by a torque transmission device in the drive train of a motor vehicle comprising a dual mass flywheel with a primary side and a secondary side, which are rotatable relative to each other against the force of an energy storage device, and a starter for starting an engine coupled to the torque transfer device with this is connectable, wherein both the primary side and the secondary side are connectable to the starter.

The starter in an embodiment of the invention is connectable to the primary side and the secondary side via a starter assembly comprising a primary side intermediate pinion engaging a primary side starter ring gear and a secondary side pinion gear engaging a secondary side starter ring gear Intermediate pinion and the secondary-side intermediate pinion via a coupling for torque transmission can be coupled together and one of the intermediate pinion with a starter pinion of the starter can be coupled. In this case, either the primary-side intermediate pinion or the secondary-side intermediate pinion can be brought into engagement with a starter pinion of the starter. The respective other intermediate pinion can be coupled via the coupling with the intermediate pinion which can be brought into engagement with the starter pinion. In one embodiment of the invention, both intermediate pinion are arranged coaxially on an intermediate shaft, wherein one of the intermediate pinion is fixedly connected to the intermediate shaft and the other intermediate pinion means of the coupling with the intermediate shaft is selectively connectable.

The meshing of the starter in the intermediate pinion causes in one embodiment of the invention at the same time closing the clutch. For this purpose, an actuating element of the clutch is preferably connected to the starter.

In one embodiment of the invention, the coupling comprises a sliding sleeve which can be actuated as an actuating element via a shift fork coupled to the starter pinion. The sliding sleeve couples the intermediate shaft with the not fixed to this intermediate pinion.

An embodiment of the invention will be described below with reference to the accompanying drawings 1 explained in more detail.

The 1 shows an embodiment of a torque transmission device according to the invention with a dual-mass flywheel according to the invention 1 and a starter assembly according to the invention in a sectional view. Such a dual mass flywheel 1 is arranged in the drive train of a motor vehicle between the crankshaft of the internal combustion engine and the vehicle clutch. The internal combustion engine is usually a gasoline or diesel engine.

The axis of rotation of the dual mass flywheel is in 1 denoted by R. The axis of rotation R is the axis of rotation of the dual mass flywheel 1 and at the same time the axis of rotation of a crankshaft of the internal combustion engine, not shown, and also the axis of rotation of the dual mass flywheel 1 downstream vehicle clutch, which is also not shown. In the following, the axial direction is understood to mean the direction parallel to the axis of rotation R and the radial direction to a direction perpendicular to the axis of rotation R. The circumferential direction is a rotation about the rotation axis R.

The dual mass flywheel 1 includes a primary mass or primary side 2 as input side as well as a secondary mass or secondary side 3 as the output side, against the force of a spring arrangement 4 relative to each other about the rotation axis R can be rotated. The spring arrangement 4 comprises a plurality of circumferentially arranged bow springs 8th comprising coaxially arranged inner and outer coil springs.

The primary mass 2 includes a motor-side primary mass plate 6 and a clutch side primary wet cover 5 holding a bow-feather 12 in which the bow springs 8th are included. The bow springs 8th are each based on the primary mass with one spring end 2 and the other end of the spring on Flanschflügeln 13 a secondary flange 9 from. The flange wings 13 extend radially outward and grasp the spring ends of the bow springs 8th one. The secondary flange 9 is with a counter pressure plate 10 by riveting 11 connected. The counterpressure plate 10 is part of a vehicle clutch and is supported by means of a rolling bearing on the primary side. The primary mass 2 is in installation position for transmitting torque with the crankshaft of the engine with mounting screws 7 bolted to the crankshaft, not shown, of the engine.

On the primary mass plate 6 is a primary-side first starter ring gear 14 arranged on the counter-pressure plate 10 the secondary side 3 is a secondary-side second starter ring gear 17 arranged.

The starter sprockets 14 . 15 can with a starter arrangement 16 be coupled and decoupled for transmitting a torque of a starter to the primary side and to the secondary side. To do this, mesh the starter ring gear 14 with a primary-side intermediate pinion 17 and the starter ring gear 15 with a secondary-side intermediate pinion 18 , The two intermediate pinions 11 . 18 are on an intermediate shaft 19 arranged by means of rolling bearings 29 . 30 is rotatably mounted. The primary-side intermediate pinion 17 is non-rotatable with the intermediate shaft 19 connected. The secondary-side intermediate pinion 18 is via a switchable clutch 20 with the intermediate shaft 19 connectable for optional torque transmission. The switchable clutch 20 includes a sliding sleeve 21 with an internal toothing on an external toothing of the intermediate shaft 19 is arranged axially displaceable. The axial displacement takes place by means of a shift fork 22 in the present embodiment with a starter pinion 23 is coupled. The shift fork includes a fork that fits into a circumferential groove of the sliding sleeve 21 intervenes. The sliding sleeve is opposite the shift fork 22 rotatable. The starter pinion 23 is fixed with a rotor shaft 26 an electric starter 27 connected. On one end face comprises the sliding sleeve 19 a coupling element 24 that with a coupling element 25 , fixed to the secondary-side intermediate pinion 18 is connected, can be coupled to transmit torque. The coupling elements 24 . 25 may have serrations, comprise claws or be designed as friction discs.

To start the engine is the starter pinion 23 by axial displacement in the direction of the arrow 28 in the primary-side intermediate pinion 17 meshed. This is done via the shift fork 22 also the sliding sleeve 21 shifted so that the shiftable clutch 20 engages. As a result, both intermediate pinion 17 . 18 for transmitting a torque with the starter pinion 23 and thus the electric starter 27 connected.

LIST OF REFERENCE NUMBERS

1

 Dual Mass Flywheel

2

 primary

3

 secondary side

4

 Arch spring assembly

5

 Primary ground cover

6

Primary ground plate

7

 fixing screw

8th

 bow spring

9

 Sekundärflansch

10

 Counter pressure plate of the vehicle clutch

11

 rivet

12

 Arch spring mount

13

 Flanschflügel

14

 primary-side starter ring gear

15

 secondary-side starter ring gear

16

 starter system

17

 primary-side intermediate pinion

18

 secondary-side intermediate pinion

19

 intermediate shaft

20

 clutch

21

 sliding sleeve

22

 shift fork

23

 starter pinion

24

 coupling member

25

 coupling member

26

 rotor shaft

27

 Starter

28

 arrow

29

 roller bearing

30

 roller bearing

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4117582 A1 [0002]

Claims (4)

Torque transmission device in the drive train of a motor vehicle comprising a dual mass flywheel ( 1 ) with a primary page ( 2 ) and a secondary side ( 3 ) against the power of an energy store ( 4 ) are rotatable relative to each other, and a starter ( 27 ), which is connectable for starting an internal combustion engine coupled to the torque transmission device, characterized in that both the primary side ( 2 ) as well as the secondary side ( 3 ) with the starter ( 27 ) are connectable. Torque transmission device according to claim 1, characterized in that the starter ( 27 ) via a starter arrangement ( 16 ) comprising a primary-side intermediate pinion ( 17 ) fitted with a primary-side starter ring gear ( 14 ) is engaged, and a secondary-side intermediate pinion ( 18 ) fitted with a secondary-side starter ring gear ( 15 ) is engaged with the primary side ( 2 ) and the secondary side ( 3 ) is connectable, wherein the primary side intermediate pinion ( 17 ) and the secondary-side intermediate pinion ( 18 ) via a coupling ( 20 ) can be coupled together for torque transmission and one of the intermediate pinion with a starter pinion ( 23 ) of the starter ( 16 ) can be coupled. Torque transmission device according to claim 2, characterized in that the meshing of the starter in the intermediate pinion ( 17 ) closing the clutch ( 20 ) causes. Torque transmission device according to claim 3, characterized in that the coupling ( 20 ) a sliding sleeve ( 21 ), which has one with the starter pinion ( 23 ) coupled shift fork ( 22 ) is operable.

Images