Engine CO Detection With Automatic Shutdown for Enclosed Use

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Solution Overview

Problem

Existing carbon monoxide detectors for portable internal combustion engine-based machines are inadequate for monitoring enclosed spaces and fail to automatically shut down operations when dangerous CO levels are detected, posing a risk of accidental poisonings.

Innovation Solution

A carbon monoxide detection system for internal combustion engines that includes a carbon monoxide detector, a controller, and an engine interrupt, which automatically shuts down the engine when CO levels exceed predetermined thresholds or show a trend of increasing CO amounts over time, and can be calibrated by additional sensors for enhanced accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a carbon monoxide detector is statically mounted, then it can monitor a fixed location, but it cannot properly monitor every enclosed area

Engineering Contradiction:
ImproveCO level detection accuracyVSAvoidmonitoring coverage area
Core Design Contradiction:
Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent transitions from static CO detectors to dynamic monitoring systems that can adapt to different locations and conditions. The system uses multiple sensors positioned at different locations within the enclosure, allowing the monitoring capability to dynamically cover various areas rather than being fixed at a single point.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If portable internal combustion engine-based machines are used in enclosed spaces, then they provide operational flexibility, but they pose a risk of accidental poisonings due to CO exhaust

Engineering Contradiction:
Improvemachine portability and operational flexibilityVSAvoidCO poisoning risk
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary monitoring of CO levels before dangerous conditions develop. The controller continuously monitors CO concentrations and can trigger warnings or automatic shutdowns before poisoning levels are reached, preventing the harmful effect rather than just responding to it after occurrence.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system implements continuous feedback monitoring of CO levels in the enclosed space. The controller receives real-time data from CO detectors and adjusts machine operation accordingly, creating a closed-loop safety system that responds to actual environmental conditions.

Inventive Principle:
Principle #23Feedback

3Measurement precision

If existing CO detectors are used without automatic shutdown capability, then they can detect CO levels, but they fail to prevent poisoning by stopping operations

Engineering Contradiction:
ImproveCO level detectionVSAvoidsafety effectiveness
Core Design Contradiction:
Measurement precisionVSReliability

Solution Approach 1:

The system implements continuous feedback monitoring of CO levels in the enclosed space. The controller receives real-time data from CO detectors and adjusts machine operation accordingly, creating a closed-loop safety system that responds to actual environmental conditions.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system provides self-service safety by automatically shutting down the internal combustion engine when dangerous CO levels are detected, without requiring external human intervention. The engine interrupt device is automatically activated by the controller based on sensor input, making the safety function self-executing.

Inventive Principle:
Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Effectively monitors CO levels in enclosed spaces and automatically shuts down the engine to prevent CO poisoning, ensuring safety by integrating a tamper-proof CO detector and intelligent control system.

Implementation Method 1

a carbon monoxide detector configured to provide signals representative of a carbon monoxide level in an environment surrounding the internal combustion engine

Methodology Applied
Scientific EffectCarbon monoxide detection:

Data Source

PatentUS12503984B2Carbon monoxide detecting system for internal combustion engine-based machines
Publication Date: 2025.12.23 GENERAC POWER SYSTEMS INC
  • US12503984B2 patent drawing
  • US12503984B2 patent drawing
  • US12503984B2 patent drawing

AI summary

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.