Aircraft Engine Fire Response With Sequential Extinguisher Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for handling engine fires in aircraft require significant pilot intervention, leading to increased workload and risk of human error, which can compromise flight safety.
Innovation Solution
An avionics system automatically controls fuel supply cutoff and extinguisher activation in response to detected engine fires, reducing pilot workload and minimizing human error by implementing a sequential fire suppression strategy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual fire suppression procedure is used, then pilot can control the fire suppression process, but pilot workload increases and risk of human error increases
Solution Approach 1:
The fire suppression system performs actions automatically without pilot intervention. The control system monitors fire detector signals and autonomously activates fuel cut-off valves and extinguishers, making the system self-serving and eliminating the need for manual pilot operations during fire events.
Solution Approach 2:
The manual mechanical operation of fire suppression controls by the pilot is replaced with an automated electronic control system. The system uses electronic signals from fire detectors to trigger fuel cut-off and extinguisher activation, substituting human mechanical actions with automated electronic control mechanisms.
2Speed
If automatic fuel cut-off is activated immediately upon fire detection, then fuel supply to fire is stopped quickly, but anti-fire agents may be sucked into the engine
Solution Approach 1:
The system performs a preliminary assessment by detecting the fire event first, then delays the fuel cut-off activation until appropriate conditions are met. This preliminary detection phase allows the system to prepare for fuel cut-off while avoiding immediate activation that would cause anti-fire agent ingestion, timing the action optimally.
Solution Approach 2:
The fuel cut-off activation is made dynamic rather than static. The system adjusts the timing and conditions of fuel cut-off based on real-time engine parameters and fire detection data, allowing flexible response that optimizes both speed of fuel cut-off and prevention of anti-fire agent ingestion under varying operational conditions.
3Reliability
If single extinguisher is used, then system complexity is reduced, but fire extinguishing reliability is insufficient
Solution Approach 1:
The fire suppression system is segmented into multiple independent extinguisher units rather than using a single extinguisher. Each extinguisher can be independently activated to address different aspects of the fire, providing redundant coverage and improved reliability while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The system incorporates redundant extinguishers as a protective measure against fire suppression failure. This beforehand cushioning ensures that if one extinguisher fails to adequately suppress the fire, additional extinguishers are available to compensate, providing a safety buffer that enhances reliability.
4Measurement precision
If pilot must interpret alarm and identify engine, then accurate fire location identification is possible, but response time increases and stress on pilot increases
Solution Approach 1:
The control system automatically identifies the affected engine by monitoring which fire detector triggers the alarm, eliminating the need for pilot interpretation. The system self-determines the fire location and initiates appropriate fuel cut-off and extinguisher activation for the specific engine, providing both accuracy and speed.
Solution Approach 2:
The system uses feedback from fire detector signals to automatically identify the affected engine. The control system receives real-time feedback from detectors positioned in different engine zones, processes this information to pinpoint the fire location, and uses this feedback to trigger the appropriate suppression actions without requiring pilot interpretation.
Data Source
AI summary
A method for controlling an aircraft comprising at least two engines, each engine being arranged in its own engine compartment, each engine being connected to a fuel supply circuit provided with its own fuel supply cut-off for cutting off a fuel supply, the aircraft comprising at least one fire detector in each engine compartment, the aircraft comprising at least one first extinguisher and one second extinguisher. An automatic assistance phase comprises, in the event of fire being detected in an engine compartment, automatically and with an avionics system, activating the fuel supply cut-off of the engine present in the compartment concerned, then triggering the first extinguisher, then triggering the second extinguisher in predetermined respective conditions.