Alternator with integrated engine controller

Patent metadata

Field	Value
Publication number	US-10263485-B2
Application number	US-201715849561-A
Country	US
Kind code	B2
Filing date	Dec 20, 2017
Priority date	Dec 21, 2016
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

An engine control system includes an engine, crankshaft, and a flywheel. The flywheel is coupled to the crankshaft of the engine and includes a number of magnets arranged axially along a first side. The system further includes a printed circuit board including a number of coils integrated into the circuit board. The printed circuit board is positioned such that a first face of the printed circuit board is positioned parallel to the first side of the flywheel. Power is generated by the flywheel rotating and causing the magnetic fields associated with the magnets to induce a current though the coils integrated into the printed circuit board.

First claim

What is claimed is:

1. An engine control system, comprising:
an engine including a crankshaft;
a flywheel coupled to the crankshaft of the engine, and comprising a plurality of magnets arranged along a first side of the flywheel;
a printed circuit board, comprising a plurality of coils integrated into the printed circuit board; and
a ferrous plate positioned on an opposite side of the printed circuit board as the flywheel;
wherein the printed circuit board is positioned such that a first face of the printed circuit board is positioned parallel to the first side of the flywheel;
wherein power is generated by the flywheel rotating causing the magnetic fields associated with the plurality of magnets to induce a current through the plurality of coils;
wherein the ferrous plate focuses the magnetic fields associated with the plurality of magnets towards the plurality of coils.

2. The engine control system of claim 1 , wherein the printed circuit board further comprises an engine control circuit, wherein the engine control circuit is configured to regulate the induced current.

3. The engine control system of claim 2 , wherein the engine control circuit is mounted to a control portion of the printed circuit board.

4. The engine control system of claim 1 , wherein the engine control circuit comprises at least one of an electronic governor control circuit, a voltage regulation circuit, an alternator control circuit, an electronic braking control circuit, an electronic ignition control circuit, an electronic starter control circuit, a position sensor, a fuel injection circuit, and a battery management circuit.

5. The engine control system of claim 1 , wherein the plurality of coils are configured to generate a three phase output voltage.

6. The engine control system of claim 1 , wherein the plurality of coils are configured to be shunted to a common point to provide a braking force.

7. The engine control system of claim 1 , further comprising a power supply configured to supply electricity to the plurality of coils to provide a locomotive force to the flywheel.

8. The engine control system of claim 3 , wherein the control portion of the printed circuit board is removable.

9. The engine control system of claim 1 , further comprising a sensor for detecting a position of the flywheel.

10. The engine control system of claim 9 , wherein the sensor is a hall effect sensor.

11. The engine control system of claim 1 , wherein the plurality of magnets are arranged axially along the first side of the flywheel.

12. An internal combustion engine, comprising:
an engine block including a cylinder;
a piston positioned within the cylinder and configured to reciprocate within the cylinder;
a crankshaft coupled to the piston and configured to rotate about a crankshaft axis;
a flywheel coupled to the crankshaft;
a plurality of magnets coupled to the flywheel;
an alternator including a printed circuit board comprising a plurality of coils integrated into the printed circuit board configured to interact with the plurality of magnets to induce a current through the plurality of coils; and
a ferrous plate positioned on an opposite side of the printed circuit board as the flywheel, the ferrous plate focuses magnetic fields associated with the plurality of magnets towards the plurality of coils.

13. The internal combustion engine of claim 12 , wherein the plurality of magnets are arranged along a first side of the flywheel.

14. The internal combustion engine of claim 13 , wherein the printed circuit board is positioned such that a first face of the printed circuit board is positioned parallel to the first side of the flywheel.

15. The internal combustion engine of claim 12 , wherein the plurality of magnets are arranged along a first side of the flywheel and along a second side of the flywheel.

16. The internal combustion engine of claim 12 , wherein the plurality of magnets are parallel to a first side of the flywheel.

17. The internal combustion engine of claim 12 , wherein the plurality of magnets are arranged axially along a first side of the flywheel.

18. The internal combustion engine of claim 12 , wherein the printed circuit board further comprises an engine control circuit, wherein the engine control circuit is configured to regulate the induced current.

19. The internal combustion engine of claim 17 , wherein the engine control circuit is mounted to a control portion of the printed circuit board.

20. The internal combustion engine of claim 18 , wherein the control portion of the printed circuit board is removable.

Assignees

• Briggs & Stratton Corp

Inventors

• Koenen Robert
• Hansen Jason

Classifications

• F02N11/04

  the motors being associated with current generators · CPC title

• H02K3/26 Primary

  consisting of printed conductors · CPC title

• H02P9/04

  Control effected upon non-electric prime mover and dependent upon electric output value of the generator · CPC title

• H02P3/22

  by short-circuit or resistive braking · CPC title

• F01P5/06

  Guiding or ducting air to, or from, ducted fans · CPC title