Carbon monoxide detecting system for internal combustion engine-based machines

Patent metadata

Field	Value
Publication number	US-11248540-B2
Application number	US-201916707621-A
Country	US
Kind code	B2
Filing date	Dec 9, 2019
Priority date	Mar 31, 2017
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

An internal combustion engine-based system includes an internal combustion engine. The internal combustion engine-based system includes an engine interrupt connected to the engine. The engine interrupt is configured to selectively stop the operation of the engine. The internal combustion engine-based system includes a controller in communication with the engine interrupt. The internal combustion engine-based system includes a carbon monoxide detector in communication with the controller. The controller uses the engine interrupt to stop the operation of the engine when the carbon monoxide detector provides the controller with signals that are representative of a carbon monoxide level proximate the internal combustion engine that together form a trend of building carbon monoxide amounts over a set time interval.

First claim

What is claimed is:

1. An internal combustion engine-based system comprising:
an internal combustion engine;
an engine interrupt connected to the engine, wherein the engine interrupt is configured to selectively stop the operation of the engine;
a controller in communication with the engine interrupt, wherein the controller includes a wireless communication module; and
a carbon monoxide detector in communication with the controller, wherein the controller uses the engine interrupt to stop the operation of the engine when the carbon monoxide detector provides the controller with signals that are representative of a carbon monoxide level proximate the internal combustion engine that together form a trend of building carbon monoxide amounts over a set time interval.

2. The internal combustion engine-based system of claim 1 , wherein the controller monitors carbon monoxide levels and uses a regression analysis to determine the trend of monitored carbon monoxide levels.

3. The internal combustion engine-based system of claim 2 , wherein a signal is sent to the engine interrupt by the controller when the slope of a regression line computed by the regression analysis is positive over the set time interval.

4. The internal combustion engine-based system of claim 2 , wherein the set time interval is between about 15 seconds and about 60 minutes.

5. The internal combustion engine-based system of claim 1 , wherein carbon monoxide readings provided to the controller by the carbon monoxide detector are representative of the carbon monoxide levels in an environment immediately surrounding the internal combustion engine.

6. The internal combustion engine-based system of claim 1 , wherein the controller is a PID controller.

7. The internal combustion engine-based system of claim 1 , wherein the carbon monoxide detector automatically ceases the operation of the internal combustion engine when communication between the carbon monoxide detector and the controller is interrupted.

8. The internal combustion engine-based system of claim 1 , wherein the controller uses the engine interrupt to stop the operation of the engine if at least one of an audio and visual alarm is activated.

9. The internal combustion engine-based system of claim 1 , wherein the controller communicates signals with a remote device that are representative of at least one of the status of the internal combustion engine and the carbon monoxide detector.

10. The internal combustion engine-based system of claim 9 , wherein the signals communicated to the remote device are representative of a carbon monoxide level proximate the internal combustion engine.

11. The internal combustion engine-based system of claim 9 , wherein the remote device is a mobile device.

12. The internal combustion engine-based system of claim 1 , further comprising a secondary sensor in communication with the controller, wherein the secondary sensor is configured to communicate signals to the controller that are representative of a carbon monoxide level proximate the internal combustion engine.

13. The internal combustion engine-based system of claim 1 , further comprising a secondary sensor in communication with the controller, wherein the secondary sensor is at least one of a carbon monoxide sensor, a temperature sensor, a humidity sensor, a proximity sensor, an accelerometer, and a timer.

14. The internal combustion engine-based system of claim 1 , wherein the controller uses the engine interrupt to cease the operation of the engine when the controller determines signals from the carbon monoxide detector exceed a minimum noise threshold.

15. The internal combustion engine-based system of claim 14 , wherein the controller alters the minimum noise threshold based on historic signals received from the carbon monoxide detector.

16. The internal combustion engine-based system of claim 1 , wherein the internal combustion engine is integral in a generator, wherein the generator is configured to transform mechanical power created by the internal combustion engine into electrical power.

17. The internal combustion engine-based system of claim 1 , wherein the controller includes a predetermined shutoff threshold that indicates the trend of building carbon monoxide amounts over the set time interval, wherein the controller uses the engine interrupt to stop the operation of the engine when the predetermined shutoff threshold is exceeded.

18. A method of supervising a carbon monoxide sensor comprising:
monitoring readings from a carbon monoxide detector over a time interval at a controller;
comparing the readings from the carbon monoxide detector to a minimum noise threshold;
determining if the readings are greater than the minimum noise threshold; and
activating a fault signal sent by the controller if the readings are not greater than the minimum noise threshold.

19. An internal combustion engine-based system comprising:
an internal combustion engine;
an engine interrupt connected to the engine, wherein the engine interrupt is configured to selectively stop the operation of the engine;
a controller in communication with the engine interrupt;
a carbon monoxide detector in communication with the controller, the carbon monoxide detector configured to communicate carbon monoxide values representative of the carbon monoxide levels in the environment immediately surrounding the internal combustion engine; and
at least one additional sensor in communication with the controller, the at least one additional sensor being one of a group comprising a temperature sensor, a humidity sensor, a proximity sensor, an accelerometer, and/or a timer, and
wherein the controller determines if the internal combustion engine is exposed to an undesirable environment based at least in part on the signals received from the at least one additional sensor.

Assignees

• Generac Power Systems Inc

Inventors

• Wischstadt Gregory A
• Schroeder Adam M
• Horn Mitchell L
• Schmidt Brandon
• Cole Kevin
• Tesch Tod R

Classifications

• F02D41/042 Primary

  for stopping the engine · CPC title

• F02D41/222

  relating to the failure of sensors or parameter detection devices · CPC title

• F02B77/086

  Sensor arrangements in the exhaust, e.g. for temperature, misfire, air/fuel ratio, oxygen sensors · CPC title

• F02D41/1453

  the characteristics being a CO content or concentration · CPC title

• F02D41/22

  Safety or indicating devices for abnormal conditions {(in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809)} · CPC title