Small engine vehicle including a generator

• US 6,603,227 B2
• Filed: 04/16/2001
• Issued: 08/05/2003
• Est. Priority Date: 04/16/2001
• Status: Expired due to Term

• Current Assignee: Briggs & Stratton LLC (Briggs & Stratton Corporation)
• Original Assignee: Briggs & Stratton Corporation
• Inventors: Rose, Robert E. Sr.
• Primary Examiner(s): LE, DANG D
• Application Number:
  US09/835,889
• Publication Number:
  US 20020149287A1
• Time in Patent Office: 841 Days
• Field of Search: 310/74, 310/113, 310/153, 310/68.R, 290/45, 180/65.1, 180/65.2, 180/65.3, 180/65.4, 180/6.48
• US Class Current: 310/74
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60L 2200/22 Microcars, e.g. golf cars
• CPC Class Codes: B60L 2260/12 of combustion engines
• CPC Class Codes: B60L 50/30 using propulsion power stored mechanically, e.g. in fly-wheels
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: H02K 7/1807 Rotary generators H02K7/006 takes precedence
• CPC Class Codes: H02K 7/1815 structurally associated with reciprocating piston engines general aspects of generating sets, e.g. housing, F02B63/04
• 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: Y10S 903/906 Motor or generator

Abstract

A small-engine vehicle including a plurality of wheels, an internal combustion engine having a drive shaft interconnected to drive at least one of the wheels, and a generator. The generator includes a stator having a core disposed next to the engine and a winding disposed on the core. The generator further includes a flywheel-rotor apparatus surrounding at least a portion of the stator and having an aperture that receives the drive shaft. The flywheel-rotor apparatus is operable to magnetically interact with the stator to produce a first high-voltage, alternating-current signal in the winding, and to provide an inertia to the internal combustion engine. The generator further includes power circuitry electrically connected to the winding. The power circuitry receives the high-voltage, alternating-current signal and controllably generates a second high-voltage, alternating-current signal.

Claims

1. A small engine vehicle, comprising:

a plurality of wheels;

an internal combustion engine having a drive shaft interconnected to drive at least one of the wheels;

a stator having a core disposed next to the engine and a winding disposed on the core;

a flywheel-rotor apparatus surrounding at least a portion of the stator and having an aperture that receives the drive shaft, the flywheel-rotor apparatus being operable to magnetically interact with the stator to produce a first high-voltage, alternating-current signal in the winding, and to provide inertia to the internal combustion engine;

power circuitry electrically connected to the winding, the power circuitry receiving the first high-voltage, alternating-current signal and controllably generating a second high-voltage, alternating-current signal, the power circuitry including

a regulator that regulates the first high-voltage, alternating-current signal to a high-voltage, direct-current signal,

a storage device that stores the high-voltage, direct-current signal, and

an inverter that converts the high-voltage, direct-current signal to the second high-voltage, alternating-current signal; and

an electrical outlet electrically connected to the power circuitry, the electrical outlet being configured to receive the second high-voltage, alternating-current signal and make the second high-voltage, alternating-current signal available for use by an operator.

2. A vehicle as set forth in claim 1 wherein the first high-voltage, alternating-current signal is greater than approximately two hundred volts peak-to-peak.

3. A vehicle as set forth in claim 1 wherein the second high-voltage, alternating-current signal is greater than approximately ninety volts root-mean-square (RMS).

4. A vehicle as set forth in claim 3 wherein the second high-voltage, alternating-current signal is between approximately one hundred and one-hundred-thirty volts RMS.

5. A vehicle as set forth in claim 1 wherein the second high-voltage, alternating-current signal is approximately sixty Hertz.

6. A vehicle as set forth in claim 1 wherein the high-voltage, direct-current signal is between approximately one-hundred-twenty and one-hundred-sixty volts direct current.

7. A vehicle as set forth in claim 1 wherein the first high-voltage, alternating-current signal is greater than approximately three-hundred volts peak-to-peak, wherein the high-voltage, direct-current signal is approximately one-hundred-fifty volts peak-to-peak, and wherein the second high-voltage, alternating-current signal is approximately one-hundred-twenty volts root-mean-square and is approximately sixty Hertz.

8. A vehicle as set forth in claim 1 wherein the flywheel-rotor apparatus includes a plurality of magnets that magnetically interact with the at least one winding.

9. A vehicle as set forth in claim 8 wherein the magnets include neodymium-iron-boron magnets.

10. A vehicle as set forth in claim 1 wherein the core includes a plurality of laminations.

11. A vehicle as set forth in claim 1 wherein the winding is a high-voltage winding, wherein the stator further includes a second winding, and wherein the flywheel-rotor apparatus magnetically interacts with the stator to produce a low-voltage, alternating-current signal in the second winding.

12. A vehicle as set forth in claim 11 wherein the low-voltage, alternating-current signal is less than fifty volts peak-to-peak.

13. A small engine vehicle comprising:

a plurality of wheels;

an internal combustion engine having a drive shaft interconnected to drive at least one of the wheels;

a stator having a core and a winding disposed on the core;

a rotor interconnected with the drive shaft, the rotor being configured to magnetically interact with the stator to produce a first high-voltage, alternating current in the winding;

power circuitry electrically connected to the winding, the power circuitry being configured to receive the first high-voltage, alternating current and to controllably generate a second high-voltage, alternating current; and

an electrical outlet electrically connected to the power circuitry, the electrical outlet being configured to receive the second high-voltage, alternating current and make the second high-voltage, alternating current available for use by an operator.

14. A vehicle as set forth in claim 13 wherein the rotor surrounds at least a portion of the stator.

15. A vehicle as set forth in claim 14 and further comprising:

a flywheel interconnected with the drive shaft, the flywheel being configured to provide an inertia to the internal combustion engine.

16. A vehicle as set forth in claim 15 wherein the rotor and flywheel form a flywheel-rotor apparatus.

17. A vehicle as set forth in claim 13 and further comprising:

a flywheel interconnected with the drive shaft, the flywheel being configured to provide an inertia to the internal combustion engine.

18. A vehicle as set forth in claim 17 wherein the rotor and flywheel form a flywheel-rotor apparatus.

19. A vehicle as set forth in claim 13 wherein the power circuitry includes

a regulator that regulates the first high-voltage, alternating current to a high-voltage, direct current,

a storage device that stores the high-voltage, direct current, and

an inverter that converts the high-voltage, direct current to the second high-voltage, alternating current.

20. A vehicle as set forth in claim 13 wherein the first high-voltage, alternating current is greater than approximately two hundred volts peak-to-peak.

21. A vehicle as set forth in claim 13 wherein the second high-voltage, alternating current is greater than approximately ninety volts root-mean-square (RMS).

22. A vehicle as set forth in claim 21 wherein the second high-voltage, alternating current is between approximately one-hundred and one-hundred-thirty volts RMS.

23. A vehicle as set forth in claim 13 wherein the second high-voltage, alternating current is approximately sixty Hertz.

24. A vehicle as set forth in claim 13 wherein the first high-voltage, alternating current is greater than approximately three-hundred volts peak-to-peak,

and wherein the second high-voltage, alternating current is approximately one-hundred-twenty volts root-mean-square and is approximately sixty Hertz.

25. A vehicle as set forth in claim 13 wherein the winding is a high-voltage winding, wherein the stator further includes a low-voltage winding, and

wherein the rotor magnetically interacts with the stator to produce a low-voltage, alternating current in the low-voltage winding.

26. A vehicle as set forth in claim 25 wherein the low-voltage, alternating current is less than approximately fifty volts peak-to-peak.

27. A vehicle as set forth in claim 25 wherein the power circuitry includes a first power circuitry, and

wherein the vehicle further comprises:

a second power circuitry electrically connected to the low-voltage wire, the second power circuitry being operable to receive the low-voltage, alternating current and controllably generate a direct current.

28. A vehicle as set forth in claim 27 wherein the second high-voltage, alternating current is approximately one hundred twenty volts root-mean-square, and the direct current is approximately twelve volts.

29. A small engine vehicle comprising:

a plurality of wheels;

an internal combustion engine having a drive shaft interconnected to drive at least one of the wheels;

a stator having a core and a winding disposed on the core;

a rotor interconnected with the drive shaft, the rotor being configured to magnetically interact with the stator to produce a first high-voltage, alternating current in the winding, the first high-voltage, alternating current being greater than approximately two hundred volts peak-to-peak;

power circuitry electrically connected to the winding, the power circuitry being configured to receive the first high-voltage, alternating current and to controllably generate a second high-voltage, alternating current, the second high-voltage, alternating current being between approximately ninety and one hundred thirty volts RMS; and

an electrical outlet electrically connected to the power circuitry, the electrical outlet being configured to receive the second high-voltage, alternating current and make the second high-voltage, alternating current available to an operator.

30. A vehicle as set forth in claim 29 wherein the rotor surrounds at least a portion of the stator.

31. A vehicle as set forth in claim 29 and further comprising:

a flywheel interconnected with the drive shaft, the flywheel being configured to provide an inertia to the internal combustion engine.

32. A vehicle as set forth in claim 31 wherein the rotor and flywheel form a flywheel-rotor apparatus.

33. A vehicle as set forth in claim 29 wherein the power circuitry includes

a regulator that regulates the first high-voltage, alternating current to a high-voltage, direct current,

a storage device that stores the high-voltage, direct current, and

an inverter that converts the high-voltage, direct current to the second high-voltage, alternating current.

34. A vehicle as set forth in claim 29 wherein the winding is a high-voltage winding,

wherein the stator further includes a second winding, and

wherein the rotor magnetically interacts with the stator to produce a low-voltage, alternating current in the second winding.

35. A vehicle as set forth in claim 34 wherein the low-voltage, alternating current is less than fifty volts peak-to-peak.

36. A vehicle as set forth in claim 35 wherein the power circuitry includes a first power circuitry, and

wherein the vehicle further comprises:

a second power circuitry electrically connected to the low-voltage wire, the second power circuitry being operable to receive the low-voltage, alternating current and controllably generate a direct current.