Device for torque distribution

• US 20080000702A1
• Filed: 06/26/2007
• Published: 01/03/2008
• Est. Priority Date: 06/30/2006
• Status: Abandoned Application

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Oesterreicher, Florian, Franke, Torsten
• Application Number:
  US11/819,318
• Publication Number:
  US 20080000702A1
• Time in Patent Office: Days
• US Class Current: 180/65.3
• CPC Class Codes: B60K 17/20 in which the differential movement is limited
• CPC Class Codes: B60K 17/3462 with means for changing distribution of torque between front and rear wheels
• CPC Class Codes: B60K 23/04 for differential gearing
• CPC Class Codes: B60K 23/0808 for varying torque distribution between driven axles, e.g. by transfer clutch
• CPC Class Codes: B60K 6/448 Electrical distribution type
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2260/28 Four wheel or all wheel drive
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A device for torque distribution between two rotatably mounted shafts, in particular between two rotating shafts of a drivetrain of a motor vehicle. The device includes an electrical machine having a rotor and a stator, the rotor being coupled support-free to one of the two shafts and the stator being coupled support-free to the other of the two shafts. Furthermore, the device includes a control unit coupled to the electrical machine for the purpose of control signal transmission, the electrical machine being drivable as a function of the control signals of the control unit in such a way that targeted transmission of torque between the two shafts is possible.

Claims

1. A device for torque distribution between two rotatably mounted shafts, the device comprising:

a first rotatably mounted shaft;

a second rotatably mounted shaft;

an electrical machine including a rotor and a stator, the rotor being coupled support-free to one of the two shafts and the stator being coupled support-free to the other of the two shafts; and

a control unit coupled to the electrical machine for control signal transmission, the electrical machine being drivable as a function of control signals of control unit such that targeted transmission of torque is possible between the two shafts.

2. The device according to claim 1, wherein both rotatably mounted shafts are implemented as a component of a directly driven shaft of a motor vehicle and both shafts are connected to one another via a transmission unit.

3. The device according to claim 2, wherein both rotatably mounted shafts are implemented as a component of the driven vehicle axle and are connected to one another via a differential gear.

4. The device according to claim 2, wherein one of the rotatably mounted shafts is implemented as a transmission output shaft driven by a differential gear and the other rotatably mounted shaft is implemented as a component of a driven vehicle axle of a motor vehicle which is connected to the differential gear.

5. The device according to claim 2, wherein both rotatably mounted shafts are implemented as a component of a driveshaft connecting the front axle and the rear axle of an all-wheel-drive motor vehicle and are connected to one another via an all-wheel transfer case.

6. The device according to claim 1, wherein the rotatably mounted shafts are implemented as a component of a non-driven vehicle axle of a motor vehicle.

7. The device according to claim 1, wherein power is supplied to the electrical machine via a power storage unit, the electrical connection between the power storage unit and the electrical machine comprising brush contacts.

8. The device according to claim 1, wherein power is supplied to the electrical machine via an inductive power transmission unit.

9. The device according to claim 7, wherein power is supplied to the electrical machine via a power storage unit situated on at least one of the electrical machine, a stator portion thereof and a rotor portion thereof.

10. The device according to claim 2, wherein power is supplied to the electrical machine via a power storage unit, the electrical connection between the power storage unit and the electrical machine comprising brush contacts.

11. The device according to claim 3, wherein power is supplied to the electrical machine via a power storage unit, the electrical connection between the power storage unit and the electrical machine comprising brush contacts.

12. The device according to claim 4, wherein power is supplied to the electrical machine via a power storage unit, the electrical connection between the power storage unit and the electrical machine comprising brush contacts.

13. The device according to claim 5, wherein power is supplied to the electrical machine via a power storage unit, the electrical connection between the power storage unit and the electrical machine comprising brush contacts.

14. The device according to claim 6, wherein power is supplied to the electrical machine via a power storage unit, the electrical connection between the power storage unit and the electrical machine comprising brush contacts.

15. The device according to claim 2, wherein power is supplied to the electrical machine via an inductive power transmission unit.

16. The device according to claim 3, wherein power is supplied to the electrical machine via an inductive power transmission unit.

17. The device according to claim 4, wherein power is supplied to the electrical machine via an inductive power transmission unit.

18. The device according to claim 5, wherein power is supplied to the electrical machine via an inductive power transmission unit.

19. The device according to claim 6, wherein power is supplied to the electrical machine via an inductive power transmission unit.

20. A method for torque distribution between two rotatably mounted shafts, the method comprising the acts of:

coupling, support-free, a rotor of an electrical machine to one of the two shafts;

coupling, support-free, a stator of the electrical machine to the other of the two shafts;

coupling a control unit to the electrical machine for control signal transmission; and

driving the electrical machine as a function of control signals of the control unit to achieve targeted transmission of torque between the two shafts.