Inflatable Rear Spoiler Structure for Adaptive Aerodynamic Drag Reduction
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Solution Overview
Problem
Existing vehicle designs lack dynamic aerodynamic solutions that can adapt to varying wind conditions to enhance performance and reduce drag.
Innovation Solution
A rear spoiler system comprising an elastic bladder and internal frame, connected to a fluid supply system, which dilates and contracts based on fluid pressure changes to adjust its shape and provide aerodynamic support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a static body panel or structure is used for vehicle outer surfaces, then manufacturing simplicity is maintained, but aerodynamic adaptability to varying wind conditions deteriorates
Solution Approach 1:
The patent applies the dynamics principle by transforming the static body panel into a dynamic structure using an inflatable bladder system. The bladder can inflate and deflate to change the aerodynamic contour of the vehicle surface in real-time, allowing adaptation to varying wind conditions while maintaining a relatively simple overall structure without complex mechanical moving parts
Solution Approach 2:
The patent employs pneumatics by using an inflatable bladder filled with fluid (air or liquid) to alter the shape of the vehicle's outer surface. The fluid pressure within the bladder controls the degree of expansion, enabling dynamic aerodynamic adjustment through a simple fluid-filled chamber rather than complex mechanical actuators
2Adaptability or versatility
If a dynamic aerodynamic solution with inflatable bladder is implemented, then aerodynamic adaptability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses a flexible bladder made of elastomeric material that can be manufactured as a simple molded component. This flexible shell approach allows the complex aerodynamic shape changes to be achieved through a single elastomeric piece rather than multiple rigid panels requiring precise alignment and assembly, thereby simplifying the manufacturing process despite the dynamic functionality
Solution Approach 2:
The patent employs composite construction by combining the elastomeric bladder material with an internal frame structure. This composite approach provides the necessary structural support and shape definition while maintaining the flexibility and aerodynamic adaptability of the bladder, allowing for straightforward manufacturing of each component that can be easily assembled
3Shape
If fluid pressure is increased to dilate the bladder for aerodynamic adjustment, then shape adaptability is improved, but structural stability may deteriorate
Solution Approach 1:
The patent divides the bladder structure into segments by incorporating an internal frame that creates compartments or sections within the bladder. This segmentation allows the structure to maintain stability at higher fluid pressures by distributing the stress across multiple sections rather than a single continuous chamber, preventing structural failure while maintaining aerodynamic shape adaptability
Solution Approach 2:
The patent controls the balance between shape adaptability and structural stability by carefully managing fluid pressure parameters. The system uses controlled fluid pressure changes to achieve the desired aerodynamic shape transformations while staying within pressure limits that maintain structural integrity, demonstrating parameter optimization to resolve the contradiction
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 system dynamically adjusts to wind conditions, reducing drag and enhancing vehicle performance by maintaining a stable shape under airflow, while being aesthetically integrated with the vehicle's exterior.
Implementation Method 1
an elastic bladder, which is in fluid communication with the fluid supply system, receives a fluid delivered by the fluid supply system, confines the fluid, and dilates upon an increase in a pressure inside the bladder resulting from an increase in an amount of the fluid confined in the bladder
Data Source
AI summary
A rear spoiler system for a vehicle includes a fluid supply system, an elastic bladder, and a frame. The bladder receives and confines a fluid delivered thereto by the fluid supply system. The bladder dilates upon an increase in a pressure inside the bladder resulting from an increase in the amount of the fluid confined therein, and contracts upon a decrease in the pressure inside the bladder resulting from a decrease in the amount of the fluid confined therein. A surface of the bladder defines an outer, exposed, and visible surface of the vehicle. The frame is arranged inside the bladder, defines a shape of the bladder, and moves with the bladder when the bladder dilates and contracts. When dilated, the upper surface of the bladder stands proud of an adjacent outer surface of the boot so as to act as a rear spoiler for the vehicle.