Aircraft Engine Cover Detection System
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Solution Overview
Problem
Aircraft engines are at risk of damage when starting due to failure of crew members to visually confirm the removal of engine inlet covers or plugs, leading to potential intake of debris or objects, which can cause engine damage.
Innovation Solution
A cover detection system comprising sensors and a controller that interact with an engine cover assembly to determine if the engine cover is installed, preventing engine start if the cover is still in place and alerting the crew through a display system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual confirmation by crew members is used to ensure cover removal, then the method is simple and requires no additional equipment, but the reliability is insufficient as crew members occasionally fail to identify the presence of the cover or plug
Solution Approach 1:
The patent replaces the mechanical/visual inspection method with an automated sensor-based detection system. Sensors (such as optical, acoustic, or electromagnetic sensors) are installed to automatically detect the presence or absence of the engine cover, eliminating the need for visual confirmation by crew members and thereby improving reliability without requiring complex manual inspection procedures.
Solution Approach 2:
The detection system enables the engine cover status to be self-detected and self-reported to the control system. The sensors automatically monitor the cover position and provide feedback to the controller, which then determines whether the engine can be started, eliminating the need for human intervention in the detection process and improving reliability.
2Object-affected harmful factors
If conventional covers or plugs are used to physically cover the engine inlet or exhaust, then the protection against debris and objects is effective, but the risk of damage occurs when crew members fail to remove them prior to engine start
Solution Approach 1:
The patent implements a feedback mechanism where sensors continuously monitor the engine cover status and provide real-time information to the control system. The controller receives feedback from the sensors about whether the cover is present or removed and uses this information to determine whether to allow engine start, thereby ensuring safe operation and preventing damage from forgotten covers.
Solution Approach 2:
The detection system performs preliminary verification before engine start is allowed. The sensors check whether the engine cover has been properly removed in advance, and the controller prevents engine start if the cover is still in place, ensuring that all safety conditions are met before the engine is started and preventing damage from debris or objects.
3Reliability
If the cover detection system uses sensor components that interact to determine cover installation, then the reliability of detection is improved, but the device complexity increases due to multiple sensors and controller integration
Solution Approach 1:
The patent employs sensor components that can serve multiple functions or are designed to be universally applicable to different engine cover types. The sensors are configured to detect various states (cover present, cover removed, partial installation) using the same basic sensing mechanism, thereby improving reliability while minimizing the need for multiple specialized sensors and reducing overall system complexity.
Data Source
AI summary
The disclosed embodiments describe cover detection systems, controllers, and aircraft. The aircraft includes the controller and parts of the cover detection systems. A cover detection system includes an engine, a first sensor, a second sensor, an engine cover, and a controller. The engine has moving parts and defines a fluid opening. The fluid opening exposes the moving parts to an ambient environment. The first sensor component is located proximate to the engine and the second sensor component is configured to interact with the first sensor component. The engine cover assembly includes an engine cover and a second sensor. The engine cover is configured to cover the fluid opening. The controller is configured to determine whether the engine cover is installed on the engine based on an interaction between the first sensor component and the second sensor component.