Front Grille Shutter Vanes With Support Bar for Noise Control
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Solution Overview
Problem
Active Grille Shutter (AGS) devices for motor vehicles face issues such as deformation and noise due to pressure and vibration, which affect air flow control and vehicle performance, requiring a cost-effective and simple solution to alleviate these problems.
Innovation Solution
An air flow control device with rotatable vanes and a support bar system, featuring fins and quarter-circle cutouts, that allows vanes to rotate between open and closed positions, reducing deformation and noise while maintaining air flow modulation capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If long vanes are used in AGS device, then air flow control capability is improved, but deformation under pressure increases causing contact with cooling modules
Solution Approach 1:
The vane is divided into multiple segments along its length, with each segment capable of independent movement. This segmentation allows the vane to flex and deform under pressure without causing the entire structure to fail or contact cooling modules, while still maintaining effective air flow control capability.
Solution Approach 2:
The vane is designed with dynamic characteristics that allow it to adapt its rigidity based on operating conditions. Under normal pressure, the vane maintains its structural integrity for effective air flow control, but under excessive pressure, it can deform flexibly to avoid contact with cooling modules, ensuring system reliability.
2Length of moving object
If long vanes are used in AGS device, then air flow control capability is improved, but vibration-induced noise increases
Solution Approach 1:
By segmenting the long vane into multiple shorter sections, the natural frequency of vibration is increased and the amplitude of vibration is reduced for each segment. This segmentation effectively decreases vibration-induced noise while preserving the overall air flow control capability of the long vane structure.
Solution Approach 2:
The vane incorporates dynamic damping characteristics that reduce vibration amplitude at operating frequencies. This allows the long vane to maintain its air flow control effectiveness while minimizing vibration-induced noise through active vibration suppression mechanisms.
3Loss of energy
If movable vanes are used to reduce drag, then fuel consumption is reduced, but cooling performance may be compromised
Solution Approach 1:
The movable vanes are dynamically controlled to adjust their position based on real-time engine temperature and cooling demands. When cooling is required, vanes open to allow air flow; when cooling is sufficient, vanes close to reduce drag and fuel consumption. This dynamic adjustment optimizes both fuel efficiency and cooling performance.
Solution Approach 2:
The AGS device incorporates feedback control mechanisms that monitor engine temperature, air flow conditions, and cooling system performance. Based on this feedback, the control system adjusts vane positions to maintain optimal balance between drag reduction for fuel efficiency and adequate cooling performance.
Data Source
AI summary
An air flow control device for a front face module of a motor vehicle, the control device including a frame and a plurality of vanes extending within and attached thereto in a rotatable manner, each vane being rotatable about an axis of rotation substantially parallel to the main extension direction of each vane. The vanes being able to rotate between an open position and a closed position. The frame includes an integral support bar extending in direction perpendicular to the main extension direction of the vanes, with the vanes having fins configured to rest on the support bar when the vanes are closed and pressured towards the support bar.