Aircraft Engine Throttle With Dual Fuel Injector Redundancy
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Solution Overview
Problem
Existing two-cylinder two-stroke piston type aeroengines lack redundancy in fuel supply, leading to engine failure if the fuel injector becomes blocked, posing a safety risk during flight.
Innovation Solution
A throttle design with dual fuel injectors, each connected to a quick-connection part, an air door, and an air door driving mechanism, including a steering gear and sensors, ensures that one injector can operate if the other fails, maintaining engine functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single fuel injector is used, then the device complexity is reduced, but the reliability deteriorates because engine failure occurs when the injector is blocked
Solution Approach 1:
The fuel supply system is segmented into multiple independent fuel injectors (at least two) that can operate separately. Each injector has its own fuel delivery path, allowing one injector to compensate when another is blocked, thereby improving reliability without requiring a completely redundant dual-system design
Solution Approach 2:
The patent implements partial redundancy by providing more fuel injectors than the minimum single injector, but not a full backup system. This excessive action ensures that even if one injector fails, sufficient fuel delivery capacity remains to keep the engine running
2Reliability
If multiple fuel injectors are added, then the reliability improves through redundancy, but the device complexity increases
Solution Approach 1:
Multiple fuel injectors are merged into a single throttle body structure, sharing common components such as the throttle valve, cavity, and housing. This integration allows redundancy in fuel delivery while avoiding the complexity of separate throttle bodies for each injector
Solution Approach 2:
The throttle body is designed as a multi-functional component that houses both the throttle valve for air flow control and multiple fuel injectors for fuel delivery. This universal structure performs multiple functions within a single component, reducing overall system complexity
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
The dual injector setup enhances engine reliability by ensuring continuous fuel supply even if one injector is blocked, reducing the risk of engine shutdown during flight.
Implementation Method 1
There is a plurality of fuel injectors, each of which is arranged on the throttle body and sprays fuel into the cavity of the throttle body
Implementation Method 2
There is an air door rotatably disposed in the cavity to open or block the inlet port and the outlet port
Data Source
Figure 1
Figure 2
AI summary
An aircraft having an engine and a throttle thereof. The throttle has a throttle body (1), the throttle body (1) is provided with a cavity (10) and comprises an inlet port (11) and an outlet port (12) both of which are connected to the cavity (10); a plurality of fuel injectors (2), each of the fuel injectors (2) is arranged on the throttle body (1) and can spray fuel into the cavity (10) of the throttle body (1); and an air filter (3). The air filter (3) is arranged on the throttle body (1) and connected to the inlet port (11). There is an air door (4) that can rotate in the cavity (10) to connect or block the inlet port (11) and the outlet port (12). Additionally, there is an air door driving part connected to the air door (4) and controls the rotation of the air door (4).