Inverter generator

Patent metadata

Field	Value
Publication number	US-11705779-B2
Application number	US-202217719046-A
Country	US
Kind code	B2
Filing date	Apr 12, 2022
Priority date	Jun 3, 2020
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

A standby generator includes a standby housing defining a cavity and an internal combustion engine. The engine includes an engine block including a cylinder comprising a piston, an engine housing at least partially covering the engine block, and a crankshaft configured to rotate about a vertical crankshaft axis in response to movement by the piston. The standby generator also includes an alternator configured to generate alternating current electrical power, a controller comprising a rectifier configured to convert the alternating current to a direct current and an inverter configured to convert the direct current to a clean alternating current electrical power, and a transfer switch configured to receive the clean alternating current electrical power from the controller and at least one of grid, solar, or battery power, and configured to supply power to an electrical load. The internal combustion engine, the alternator, and the controller are positioned within the cavity.

First claim

What is claimed is:

1. A standby generator comprising:
a standby housing defining a cavity;
an internal combustion engine comprising:
an engine block including a cylinder comprising a piston;
an engine housing at least partially covering the engine block; and
a crankshaft configured to rotate about a vertical crankshaft axis in response to movement by the piston;

an alternator comprising a rotor and a stator, the rotor configured to rotate with the rotation of the crankshaft to generate alternating current electrical power;
a fan positioned above and coupled to the rotor;
a controller comprising a rectifier configured to convert the alternating current to a direct current and an inverter configured to convert the direct current to a clean alternating current electrical power;
a transfer switch configured to receive the clean alternating current electrical power from the controller and at least one of grid power from an electrical grid, solar power from a solar panel assembly, or battery power from a battery, and configured to supply power to an electrical load; and
a switch configured to selectively enable the flow of a first type of fuel into the cylinder and disable the flow of a second type of fuel, wherein the switch is communicatively coupled to the controller and wherein the controller is configured to receive an indication of a fuel type based on a position of the switch,
wherein the internal combustion engine, the alternator, and the controller are positioned within the cavity of the standby housing for protection from the external environment.

2. The standby generator of claim 1 , wherein the alternator is positioned above and coupled to the internal combustion engine, and wherein the fan is configured to draw in air from above the standby generator and move the air through the alternator to the internal combustion engine.

3. The standby generator of claim 2 , wherein the internal combustion engine is configured to utilize at least a portion of the air drawn in by the fan.

4. The standby generator of claim 3 , further comprising a muffler positioned below the internal combustion engine.

5. The standby generator of claim 4 , wherein the standby housing includes a floor panel, a plurality of side panels, each extending upwardly away from the floor panel, and a cover, wherein the floor panel, side panels, and cover define the cavity.

6. The standby generator of claim 5 , further comprising a frame configured to couple the internal combustion engine to the floor panel and to separate the alternator, the controller, the fan, and the muffler from the floor panel.

7. The standby generator of claim 1 , wherein the switch is configured to selectively enable the flow of the first type of fuel into the cylinder by physically opening a first valve and to selectively disable the flow of the second type of fuel by physically closing a second valve.

8. A standby generator comprising:
a standby housing defining a cavity;
an internal combustion engine comprising:
an engine block including a cylinder comprising a piston;
an engine housing at least partially covering the engine block;
a crankshaft configured to rotate about a vertical crankshaft axis in response to movement by the piston; and
a spark plug configured to periodically generate a spark to ignite fuel in the cylinder to control the movement of the piston;

an alternator positioned within an alternator housing and comprising a rotor and a stator, the rotor configured to rotate with the rotation of the crankshaft to generate alternating current electrical power; and
a controller positioned within the alternator housing and including a rectifier configured to convert the alternating current to a direct current and an inverter configured to convert the direct current to a clean alternating current electrical power;
a transfer switch configured to receive the clean alternating current electrical power from the controller and at least one of grid power from an electrical grid, solar power from a solar panel assembly, or battery power from a battery, and configured to supply power to an electrical load
wherein the controller is configured to:
control spark generation timing of the spark plug;
receive an indication of a fuel type; and
adjust the spark generation timing of the spark plug based on the indication of a fuel type, and

wherein the internal combustion engine, the alternator, and the controller are positioned within the cavity of the standby housing for protection from the external environment.

9. The standby generator of claim 8 , wherein the fuel type comprises one of liquefied petroleum or natural gas.

10. The standby generator of claim 8 , further comprising a switch configured to selectively enable the flow of a first type of fuel into the cylinder and disable the flow of a second type of fuel.

11. The standby generator of claim 10 , wherein the switch is configured to generate the indication of the fuel type.

12. The standby generator of claim 8 , further comprising a sensor configured to detect the fuel type and generate the indication based on the detected fuel type.

13. The standby generator of claim 8 , wherein the alternator comprises a rotor position sensor communicatively coupled to the controller and configured to detect a rotational position of the rotor, and wherein the controller is configured to receive rotor position data from the rotor position sensor and adjust the spark generation timing of the spark plug based on the rotor position data.

14. A standby generator comprising:
a standby housing defining a cavity;
an internal combustion engine comprising:
an engine block including a cylinder comprising a piston;
an engine housing at least partially covering the engine block;
a crankshaft configured to rotate about a vertical crankshaft axis in response to movement by the piston; and
a spark plug configured to periodically generate a spark to ignite fuel in the cylinder to control the movement of the piston;

an alternator comprising a rotor and a stator, the rotor configured to rotate with the rotation of the crankshaft to generate alternating current electrical power;
a battery configured to supply power to the alternator; and
a controller including a rectifier configured to convert the alternating current to a direct current and an inverter configured to convert the direct current to a clean alternating current electrical power;
wherein the rotor is further configured to rotate the crankshaft using power from the battery to start the internal combustion engine,
wherein the controller is configured to detect an electrical load and wherein the starting speed is determined based on the detected electrical load, and
wherein the internal combustion engine, the alternator, and the controller are positioned within the cavity of the standby housing for protection from the external environment.

15. The standby generator of claim 14 , wherein the controller is configured to determine a starting speed of the internal combustion engine and to control the rotation speed of the rotor based on the determined starting speed.

16. A standby generator comprising:
a standby housing defining a cavity;
an internal combustion engine comprising:
an engine block including a cylinder comprising a piston;
an engine housing at least partially covering the engine block;
a crankshaft configured to rotate about a vertical crankshaft axis in response to movement by the piston; and
a spark plug configured to periodically generate a spark to ignite fuel in the cylinder to control the movement of the pi

Assignees

• Briggs & Stratton Llc

Inventors

• Byaliy Svetlana
• Cirillo Joshua Thurnbauer
• Helwig Philip
• Lim Sie Teong
• Molinski Mark Thomas
• Stair Kenny Jalmas
• Townsend Robert
• Whitmore Jeffrey H

Classifications

• H02K7/1815 Primary

  structurally associated with reciprocating piston engines (general aspects of generating sets, e.g. housing, F02B63/04) · CPC title

• F02B63/042

  Rotating electric generators · CPC title

• F02B63/044

  the engine-generator unit being placed on a frame or in an housing · CPC title

• F02B69/04

  for gaseous and non-gaseous fuels · CPC title

• F02P5/1506

  with particular means during starting · CPC title