Systems and methods for generating power for an electric sub-assembly of a motor vehicle

• US 9,344,011 B2
• Filed: 01/31/2014
• Issued: 05/17/2016
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Abou-Nasr, Mahmoud A., Filev, Dimitar Petrov, Flanigan, Cynthia Mowery, Rohweder, David Scott, Tardiff, Janice Lisa
• Primary Examiner(s): Macchiarolo, Peter
• Assistant Examiner(s): JENKINS, JERMAINE L
• Application Number:
  US14/170,273
• Publication Number:
  US 20150222204A1
• Time in Patent Office: 837 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: B60C 23/041 Means for supplying power to the signal- transmitting means on the wheel
• CPC Class Codes: B60C 23/0493 for attachment on the tyre
• CPC Class Codes: G01L 17/00 Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
• CPC Class Codes: H02N 1/08 with conductive charge carrier, i.e. capacitor machines
• CPC Class Codes: H02N 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

A system for generating power for an electric sub-assembly of a motor vehicle may include at least one reverse electrowetting energy harvesting element coupled to a tire of the motor vehicle. The system may further include at least one controller configured to accumulate electric energy generated by the at least one reverse electrowetting energy harvesting element and supply the accumulated electric energy to at least one sub-assembly mounted on the tire.

Claims

1. A system for generating power for an electric sub-assembly of a motor vehicle, the system comprising:

at least one reverse electrowetting energy harvesting element coupled to a tire of the motor vehicle; and

at least one controller configured to accumulate electric energy generated by the at least one reverse electrowetting energy harvesting element and supply the accumulated electric energy to at least one sub-assembly mounted on the tire.

2. The system of claim 1, wherein the at least one reverse electrowetting energy harvesting element comprises at least one reverse electrowetting pad.

3. The system of claim 2, wherein the at least one reverse electrowetting pad comprises a single continuous, stretchable reverse electrowetting pad that extends around a rotation axis of the tire.

4. The system of claim 2, wherein the at least one reverse electrowetting pad comprises a plurality of reverse electrowetting pads arranged around a rotation axis of the tire.

5. The system of claim 2, wherein the at least one reverse electrowetting pad is adhered to an interior surface of the tire.

6. The system of claim 2, wherein the at least one reverse electrowetting pad is embedded within the tire.

7. The system of claim 1, wherein the at least one controller is configured to regulate and smooth the accumulated electric energy.

8. The system of claim 1, wherein the at least one controller is configured to supply the accumulated electric energy to a tire pressure monitoring system.

9. The system of claim 1, wherein the at least one controller is configured to supply the accumulated electric energy to an active air compensation system.

10. The system of claim 1, further comprising a rectifier configured to convert the electric energy generated by the energy harvesting element from an alternating current to a direct current.

11. A method for generating power for an electric sub-assembly of a motor vehicle, the method comprising:

generating an electric current via at least one reverse electrowetting energy harvesting element coupled to a tire of the motor vehicle;

powering at least one sub-assembly associated with the tire with the electric current.

12. The method of claim 11, wherein generating the electric current comprises generating the electric current from strain produced by cyclic deformation of the tire through rolling contact with a road surface.

13. The method of claim 11, wherein generating the electric current comprises converting a mechanical vibration of the tire to electrical energy.

14. The method of claim 11, wherein generating the electric current comprises generating the electric current via at least one reverse electrowetting energy pad embedded within the tire.

15. The method of claim 11, wherein generating the electric current comprises generating the electric current via at least one reverse electrowetting energy pad adhered to an interior surface of the tire.

16. The method of claim 11, wherein generating the electric current comprises generating about 95 watts to about 223 watts of power at a contact surface area of the tire with a road.

17. The method of claim 11, wherein powering the at least one sub-assembly comprises powering a tire pressure monitoring system.

18. The method of claim 11, wherein powering the at least one sub-assembly comprises powering an active air compensation system.

19. The method of claim 11, wherein generating the electric current comprises generating an electric current for each tire of the motor vehicle via one or more reverse electrowetting pads coupled to each respective tire, and

wherein powering the at least one sub-assembly comprises powering one or more sub-assemblies mounted to each respective tire via the respective electric current generated for each tire.

20. A method of assembling a system for generating power for an electric sub-assembly of a motor vehicle, the method comprising:

embedding at least one reverse electrowetting energy harvesting element within a tire of the motor vehicle; and

coupling the at least one reverse electrowetting energy harvesting element to at least one controller configured to accumulate electric energy generated by the at least one reverse electrowetting energy harvesting element and supply the accumulated electric energy to at least one sub-assembly mounted on the tire.