Torque transmission device, in particular for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10486519-B2
Application number	US-201715609467-A
Country	US
Kind code	B2
Filing date	May 31, 2017
Priority date	Jun 9, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

The invention relates to a torque transmission device ( 1 ), having torque input means ( 2, 24 ) intended to be rotationally coupled to a crankshaft of an internal combustion engine ( 7 ), and torque output means ( 8 ) intended to be rotationally coupled to an input shaft ( 10 ) of a gearbox ( 36 ) and to a rotor ( 34 ) of an electric machine, the torque input means ( 2, 24 ) being capable of pivoting with respect to the torque output means ( 8 ) around an axis (X).

First claim

The invention claimed is:

1. A torque transmission device ( 1 ), comprising:
a torque input device ( 2 , 24 ) intended to be non-rotatably coupled to a crankshaft of an internal combustion engine ( 7 ); and
a torque output device ( 8 ) intended to be non-rotatably coupled to an input shaft ( 10 ) of a gearbox ( 36 ) and to a rotor ( 34 ) of an electric machine; and
a controller;
the torque input device ( 2 , 24 ) configured to pivot with respect to the torque output device ( 8 ) around an axis (X);
the controller configured to selectively:
non-rotatably couple the torque input device ( 2 , 24 ) and the torque output device ( 8 ) via a first torque transfer path having a clutch ( 11 , 12 , 18 ) in a first operating mode; or
non-rotatably couple the torque input device ( 2 , 24 ) and the torque output device ( 8 ) via a second torque transfer path having no clutch in a second operating mode.

2. The torque transmission device ( 1 ) according to claim 1 , wherein the controller is configured to, in a third operating mode, rotatably decouple the torque input device ( 2 , 24 ) and the torque output device ( 8 ).

3. The torque transmission device ( 1 ) according to claim 1 , wherein the controller has a release bearing ( 21 ) comprising an actuation member ( 23 ) movable between:
a first axial position corresponding to the first operating mode, and
a second axial position corresponding to the second operating mode.

4. The torque transmission device ( 1 ) according to claim 3 , wherein the controller also has a transmission member ( 28 ) comprising a first coupling zone ( 29 ) intended to be non-rotatably coupled to the input shaft ( 10 ) of the gearbox ( 36 ) and a second coupling zone ( 30 ), wherein the transmission member ( 28 ) is movable axially with the movable actuation member ( 23 ) of the release bearing ( 21 ), and wherein the second coupling zone ( 30 ) is coupled to the torque input device ( 2 , 24 ) in the second axial position.

5. The torque transmission device ( 1 ) according to claim 4 , wherein the first coupling zone ( 29 ) is situated radially inside the transmission member ( 28 ), and wherein the second coupling zone ( 30 ) is situated radially outside the transmission member ( 28 ).

6. The torque transmission device ( 1 ) according to claim 3 , wherein the clutch has at least two plates ( 12 ) and at least one friction disc ( 11 ) situated axially between the at least two plates ( 12 ), wherein the at least one friction disc ( 11 ) or the at least two plates ( 12 ) respectively are non-rotatably coupled to a hub ( 8 ) of the torque output device, wherein the at least two plates ( 12 ) or the at least one friction disc ( 11 ) respectively are coupled to the torque input device ( 2 , 24 ), and wherein the at least two plates ( 12 ) being are brought axially closer to one another in order to clamp the at least one friction disc ( 11 ) in the first operating mode.

7. The torque transmission device ( 1 ) according to claim 6 , wherein the clutch has a diaphragm ( 18 ) configured to flex between an engaged position in which the diaphragm ( 18 ) clamps the at least one friction disc ( 11 ) between the at least two plates ( 12 ), and a disengaged position the diaphragm ( 18 ) releases the at least one friction disc ( 11 ), wherein the actuation member ( 23 ) is configured to come into abutment against the diaphragm ( 18 ) so as to displace the diaphragm ( 18 ) into the engaged position in the first axial position of the actuation member ( 23 ).

8. The torque transmission device ( 1 ) according to claim 7 , wherein the diaphragm ( 18 ) is annular, wherein the actuation member ( 23 ) comes into abutment against a radially inner periphery of the diaphragm ( 18 ) in the first axial position, wherein the diaphragm ( 18 ) is disposed adjacent to a first radially outer abutment zone ( 19 ), and wherein the diaphragm ( 18 ) comes into abutment against one of the at least two plates ( 12 ), directly or indirectly, in a second abutment zone ( 17 ) situated radially inside the first radially outer abutment zone ( 19 ).

9. The torque transmission device ( 1 ) according to claim 4 , wherein the torque input device includes a cover ( 2 ) that receives, at least in part, the clutch ( 11 , 12 , 18 ), the actuation member ( 23 ), the transmission member ( 28 ) and the hub ( 8 ).

10. The torque transmission device ( 1 ) according to claim 4 , wherein the torque input device includes a cover ( 2 ) and a connecting member ( 24 ) non-rotatably coupled to the cover ( 2 ), wherein the second coupling zone ( 30 ) of the transmission member ( 28 ) is in mesh with the connecting member ( 24 ) in the second axial position of the actuation member ( 23 ) and of the transmission member ( 28 ).

11. A hybrid drive system, comprising:
an internal combustion engine ( 7 ) having a crankshaft rotatable about an axis (X);
an electric machine having a stator and a rotor ( 34 ) rotatable with respect to the stator around the axis (X);
a gearbox ( 36 ) having an input shaft ( 10 );
a torque transmission device ( 1 ) according to claim 1 ;
the rotor ( 34 ), the input shaft ( 10 ) of the gearbox ( 36 ) and the torque output device ( 8 ) being non-rotatably coupled;
the torque input device ( 2 , 24 ) and the crankshaft being non-rotatably coupled.

12. The torque transmission device ( 1 ) according to claim 2 , wherein the controller has a release bearing ( 21 ) comprising an actuation member ( 23 ) movable between:
a first axial position corresponding to the first operating mode,
a second axial position corresponding to the second operating mode, and
a third axial position corresponding to the third operating mode.

13. The torque transmission device ( 1 ) according to claim 2 , wherein the clutch has at least two plates ( 12 ) and at least one friction disc ( 11 ) situated axially between the at least two plates ( 12 ), the at least one friction disc ( 11 ) or the at least two plates ( 12 ) respectively are non-rotatably coupled to a hub ( 8 ) of the torque output device, wherein the at least two plates ( 12 ) or the at least one friction disc ( 11 ) respectively are coupled to the torque input device ( 2 , 24 ), and wherein the at least two plates ( 12 ) are brought axially closer to one another in order to clamp the at least one friction disc ( 11 ) in the first operating mode.

14. The torque transmission device ( 1 ) according to claim 4 , wherein the clutch has at least two plates ( 12 ) and at least one friction disc ( 11 ) situated axially between the at least two plates ( 12 ), the at least one friction disc ( 11 ) or the at least two plates ( 12 ) respectively are non-rotatably coupled to a hub ( 8 ) of the torque output device, wherein the at least two plates ( 12 ) or the at least one friction disc ( 11 ) respectively are coupled to the torque input device ( 2 , 24 ), and wherein the at least two plates ( 12 ) are brought axially closer to one another in order to clamp the at least one friction disc ( 11 ) in the first operating mode.

15. The torque transmission device ( 1 ) according to claim 5 , wherein the clutch has at least two plates ( 12 ) and at least one friction disc ( 11 ) situated axially between the at least two plates ( 12 ), the at least one friction disc ( 11 ) or the at least two plates ( 12 ) respectively are non-rotatably coupled to a hub ( 8 ) of the torque output device, wherein the at least two plates ( 12 ) or the at least one friction disc ( 11 ) respectively are coupled to the torque input device ( 2 , 24 ), and wherein the at least two plates ( 12 ) are brought axially closer to one another i

Assignees

• Valeo Embrayages

Inventors

• Lebas Gilles
• Commeine Emmanuel

Classifications

• B60K6/40

  characterised by the assembly or relative disposition of components · CPC title

• B60Y2400/4244

  of wet type, e.g. using multiple lamellae · CPC title

• F16D13/46

  in which two axially-movable members, of which one is attached to the driving side and the other to the driven side, are pressed from one side towards an axially-located member · CPC title

• H02K7/116

  with gears · CPC title

• B60K6/48

  Parallel type · CPC title