Piezoelectric powered vehicles and motors

• US 7,679,271 B2
• Filed: 10/22/2008
• Issued: 03/16/2010
• Est. Priority Date: 04/27/2005
• Status: Expired due to Fees

• Current Assignee: Drexel University
• Original Assignee: Drexel University
• Inventors: Genis, Vladimir, Soukhomlinoff, Alexandre
• Primary Examiner(s): Dougherty; Thomas M
• Application Number:
  US12/256,213
• Publication Number:
  US 20090045698A1
• Time in Patent Office: 510 Days
• Field of Search: 310/339
• US Class Current: 310/339
• CPC Class Codes: B60K 25/10 directly from oscillating movements due to vehicle running motion, e.g. suspension movement resilient suspensions having dampers accumulating utilisable energy, e.g. compressing air, B60G13/14
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: H02N 2/18 producing electrical output from mechanical input, e.g. generators for measurement devices G01
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

One or more piezoelectric elements are employed to generate electrical energy from one or both of the mechanical energy of a moving part of a conventional engine or vehicle or the combustion energy of an internal combustion engine. The generated electrical energy can be stored and used to power an electric motor in order to supplement the power generated by the conventional engine.

Claims

1. A piezoelectric system for use in vehicles, said system comprising:

a moving part, wherein said moving part moves in a first direction and a second direction;

a first piezoelectric element and a second piezoelectric element, wherein said first piezoelectric element is positioned to generate electrical energy by the movement of said moving part in the first direction and said second piezoelectric element is positioned to generate electrical energy by the movement of said moving part in the second direction; and

an electric motor operably connected to at least one of said first and second piezoelectric elements for conversion of electrical energy to mechanical energy.

2. The system of claim 1, wherein said moving part is part of an engine that is not primarily powered by electrical power.

3. The system of claim 2, further comprising an energy splitter for alternately or simultaneously transmitting energy from said engine and said mechanical energy converted from the electrical energy to a drive system of the vehicle.

4. The system of claim 2, wherein said engine is powered by a fuel selected from the group consisting of gasoline, diesel fuel, oil, ethanol, methanol, compressed natural gas (CNG), liquefied natural gas (LNG), liquefied petroleum gas (LPG), bio-diesel, and hydrogen.

5. The system of claim 1, wherein said moving part is selected from the group consisting of a piston and a crankshaft.

6. The system of claim 1, wherein a mechanical element is connected to the moving part.

7. The system of claim 6, wherein the mechanical element is made of a material selected from the group consisting of ceramics and plastics.

8. The system of claim 1, further comprising an energy storage device operably connected to said first piezoelectric element for storing electrical energy generated by said first piezoelectric element.

9. A piezoelectric system for use in a vehicle, comprising:

an internal combustion engine including at least one combustion chamber,

a plurality of piezoelectric elements positioned in said combustion chamber, wherein said plurality of piezoelectric elements generate electrical energy due to combustion in said combustion chamber, wherein the plurality of piezoelectric elements comprises at least two piezoelectric elements located at opposite ends of said combustion chamber and at least one toroidal piezoelectric element located between said at least two piezoelectric elements; and

an electric motor operably connected to said at least one of said plurality of piezoelectric elements for conversion of electrical energy to mechanical energy.

10. The system of claim 9, wherein said internal combustion engine is powered by a fuel selected from the group consisting of gasoline, diesel fuel, oil, ethanol, methanol, compressed natural gas (CNG), liquefied natural gas (LNG), liquefied petroleum gas (LPG), bio-diesel, and hydrogen.

11. A method for generating mechanical energy in a vehicle comprising:

positioning a first piezoelectric element and a second piezoelectric element, wherein said first piezoelectric element is positioned to generate electrical energy by the movement of a moving part in a first direction and said second piezoelectric element is positioned to generate electrical energy by the movement of the moving part in a second direction;

moving said moving part in the first direction so as to generate electrical energy from the first piezoelectric element;

moving said moving part in the second direction so as to generate electrical energy from the second piezoelectric element; and

converting the generated electrical energy to mechanical energy.

12. The method of claim 11, wherein said moving part is part of an engine that is not primarily powered by electrical power.

13. The method of claim 12, further comprising an energy splitter for alternately or simultaneously transmitting energy from said engine and said mechanical energy converted from the generated electrical energy to a drive system of the vehicle.

14. The method of claim 11, wherein said engine is powered by a fuel selected from the group consisting of gasoline, diesel fuel, oil, ethanol, methanol, compressed natural gas (CNG), liquefied natural gas (LNG), liquefied petroleum gas (LPG), bio-diesel, and hydrogen.

15. The method of claim 11, wherein said moving part is selected from the group consisting of a piston and a crankshaft.

16. The method of claim 11, wherein a mechanical element is connected to the moving part.

17. The method of claim 16, wherein the mechanical element is made of a material selected from the group consisting of ceramics and plastics.

18. The method of claim 11, further comprising storing said generated electrical energy in an energy storage device.

19. The method of claim 11, wherein the mechanical energy is provided to a drive system.