Segmented Air Guiding System for Vehicle Rear Axle Aerodynamics
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Solution Overview
Problem
Existing vehicle air guiding systems lack the ability to adapt their transverse dimension quickly and simply during the transition from an inoperative to an operative position, which limits their effectiveness in enhancing the rear axle output coefficient while maintaining a consistent drag coefficient.
Innovation Solution
The system divides the main air guiding element into sections that can be displaced transversely, with auxiliary elements closing any gaps formed during this movement, allowing for a rapid and straightforward adaptation of the system's transverse dimension, either through integral or flap-type auxiliary elements articulatingly connected to the main sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the main air guiding element is divided into sections that can be displaced transversely, then the transverse dimension can be adapted quickly and simply, but the device complexity increases
Solution Approach 1:
The main air guiding element is divided into multiple sections (first main section, second main section, and auxiliary section) that can be independently displaced transversely. This segmentation allows the transverse dimension to be adapted by moving individual sections rather than the entire structure, enabling quick and simple adaptation while managing complexity through modular design.
Solution Approach 2:
The air guiding system incorporates movable sections that can be dynamically adjusted between different transverse positions. The first and second main sections can be displaced transversely relative to each other, and the auxiliary section can be moved into gaps formed during this displacement, creating a dynamic system that adapts its transverse dimension as needed.
2Reliability
If auxiliary air guiding elements are used to close gaps during transverse movement, then aerodynamic performance is maintained, but the device complexity increases
Solution Approach 1:
The auxiliary air guiding section is designed to be extractable or movable into the gaps formed between the first and second main sections during transverse displacement. This extracted element closes the gap to maintain aerodynamic performance, while being a separate, manageable component rather than an integrated complex mechanism.
Solution Approach 2:
The auxiliary air guiding section acts as an intermediary element that fills the gap created by the transverse displacement of the main sections. This mediator maintains the continuous aerodynamic surface needed for performance while allowing the main sections to move independently for transverse dimension adaptation.
3Productivity
If the transverse dimension is enlarged by displacing main air guiding element sections, then the rear axle output coefficient increases, but the drag coefficient may worsen
Solution Approach 1:
The system dynamically adjusts the transverse dimension by displacing the first and second main sections relative to each other, allowing the rear axle output coefficient to be increased when needed. The auxiliary section moves into the resulting gap to maintain aerodynamic continuity, ensuring that the drag coefficient does not worsen significantly despite the enlarged transverse dimension.
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 design enables a significant increase in the rear axle output coefficient by allowing the air guiding system to expand its transverse dimension efficiently, maintaining aerodynamic performance and simplifying the construction and operation of the system.
Implementation Method 1
The air guiding element is configured as an aerofoil which, by way of an operating device, can be displaced or changed between the inoperative position and the operative position
Data Source
AI summary
An air guiding system for a vehicle, particularly for a passenger car, is arranged in a rear area of the vehicle and has a main air guiding element that can be displaced from a moved-in inoperative position into a moved-out operative position. Viewed in the longitudinal direction of the vehicle, the main air guiding element, while forming at least two main air guiding element sections, is divided such that, when the main air guiding element is displaced from the inoperative position into the operative position, at least lateral main air guiding element sections can be moved transversely to the longitudinal direction of the vehicle.