Patent ID: 11905894
Assignee: GENERAC POWER SYSTEMS, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 16:
17. A method of operating an internal combustion engine-based system of a portable generator, the method comprising:
detecting a carbon monoxide level proximate an internal combustion engine using a carbon monoxide detector;
activating a shutdown action under one of at least two shut down conditions, both of which are evaluated by a controller, including:
a first shutdown condition in which a magnitude value of detected carbon monoxide signals, over a set time interval, exceeds a predetermined shutoff threshold value; and
a second shutdown condition in which, for signal values exceeding a minimum noise threshold, a rate of change value determined from the detected carbon monoxide signals, over a set time interval, is one or both of a positive value or a value that exceeds a first predetermined rate of change threshold value.