Wind Guiding Device Disruptors for Open-Top Vehicle Draft Reduction
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Solution Overview
Problem
Existing wind guiding devices for passenger vehicles with open tops fail to adequately reduce excessive drafts, turbulences, and wind noise, leading to suboptimal driving comfort.
Innovation Solution
The integration of disruptive bodies on the underside of the wind guiding element, which influence airflow to prevent air separation and noise formation, by shaping the air stream at the back peripheral edge to create a uniform air cylinder formation and reduce temporal speed differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a wind guiding element is used to guide airflow over the interior space, then drafts are reduced, but excessive air turbulences and wind noise are generated
Solution Approach 1:
The wind guiding element is equipped with disruptors at specific locations (front edge and/or rear edge) that create localized flow disturbances. These disruptors modify the airflow characteristics only in critical regions where turbulence and noise generation occur, while maintaining smooth flow guidance over the interior space. This localized intervention reduces drafts without generating excessive turbulence and wind noise throughout the entire vehicle interior.
2Ease of operation
If the wind guiding element is positioned to guide air over the interior space, then driving comfort is improved, but air separation and noise formation occur at the back peripheral edge
Solution Approach 1:
Disruptors are positioned at the front edge and/or rear edge of the wind guiding element to preliminarily disturb the airflow before it reaches critical separation zones. By introducing controlled flow disturbances at these strategic locations, the airflow is prepared to attach smoothly to the wind guiding element surface, preventing air separation and noise formation at the back peripheral edge while maintaining comfortable airflow over the interior space.
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 significantly enhances driving comfort by minimizing unwanted turbulences and noise, particularly howling and whistling sounds, when the vehicle is driven with an open top, by ensuring a more even airflow and reduced noise levels.
Implementation Method 1
the emergence of excessive air turbulences and wind and air separation sounds
Implementation Method 2
a non-coherent separation of the air stream can be achieved on the back peripheral edge of the wind guiding element
Data Source
AI summary
A wind guiding device for an open-top passenger vehicle is disclosed. The wind guiding device has an inherently stiff, slat-shaped wind guiding element that can be adjusted between a retracted position and at least one wind guiding position relative to a windscreen frame. Several disruptive bodies are arranged on the underside of the wind guiding element.