Self-Actuating Flap for Engine Air Circuit Pressure Control
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Solution Overview
Problem
Existing heat engine air circuit assemblies require costly actuators and complex control systems to manage fluid distribution between pipes, which increases operational costs and complexity.
Innovation Solution
An assembly featuring a first and second pipe with a pressure variation source and a movable fluid routing flap that automatically switches positions based on pressure changes, eliminating the need for external actuators by using the pressure source's torque to control fluid flow between the pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an actuator is provided to vary the distribution of fluid between the first pipe and the second pipe, then the fluid distribution can be controlled, but the cost increases and a suitable control law is required
Solution Approach 1:
The system uses itself to control itself: the pressure variation source in the second pipe generates pressure differences that automatically move the switching flap to appropriate positions, eliminating the need for external actuators and control systems. The fluid pressure self-regulates the flap position based on flow conditions.
Solution Approach 2:
The invention uses pneumatic pressure variations in the second pipe to actuate the switching flap. The pressure differences created by fluid flow through the pipes directly control the flap position, replacing mechanical actuators with a pneumatic control mechanism.
2Productivity
If the switching flap is positioned to close off the portion of the first pipe, then fluid can circulate mainly in the second pipe, but fluid circulation in the first pipe may be interrupted
Solution Approach 1:
The switching flap is divided into two distinct parts: a first part that closes the second pipe and a second part that closes the first pipe. This segmentation allows independent control of each pipe's closure, enabling the system to maintain fluid circulation in one pipe while directing flow through the other, thus preserving circulation continuity while maintaining productivity.
3Productivity
If the passage section for fluid in the second pipe increases when the flap closes off the first pipe, then fluid can circulate efficiently in the second pipe, but the flap must be precisely positioned
Solution Approach 1:
The system uses pressure feedback from the fluid flow itself to position the flap accurately. The pressure variation source creates pressure differences that automatically move the flap to the correct position where the passage section is optimized, eliminating the need for precision manufacturing of positioning mechanisms.
Solution Approach 2:
The flap positioning is made dynamic rather than static. The flap automatically adjusts its position in response to changing pressure conditions and flow rates, allowing the passage section to be optimized for current operating conditions without requiring fixed precision positioning for all conditions.
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
This solution allows for efficient and cost-effective fluid distribution management, reducing the reliance on expensive actuators and simplifying the control system while ensuring precise fluid routing, thereby enhancing the heat engine's performance and reducing operational costs.
Implementation Method 1
the pressure variation generated in the second pipe by the source exceeds a predefined value, this pressure variation then exerting a torque on the switching flap allowing this passage into the second position
Implementation Method 2
a holding member exerting a torque configured to bring or hold the switching flap in the first position
Data Source
Figure 1~3
Figure 4~6
Figure 7~8
AI summary
The invention relates to an assembly (1) including: a first duct (11); a second duct (12), forming a by-pass of a portion of the first duct (11), including a compressor (15); a flap, in either the second duct (12) or said portion, which is movable between: a first position allowing the fluid to flow mostly inside said portion; and a second position allowing the fluid to flow mostly inside the second duct (12); a supporting member configured such as to move or hold the flap (3) in the first position, the flap (3) passing from the first position to the second position when the pressure variation generated by the compressor (15) exceeds a predefined value, the wall of the second duct (12) and the flap (3) being configured such as to define a cross-sectional area, said cross-sectional area increasing at the earliest when said flap (3) seals said portion.