Vehicle Grille Sag Prevention via Nested Support Channel
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Solution Overview
Problem
Vehicle grilles tend to sag over time due to lack of support, especially in the center, and alignment with bumper fascia and headlights can be difficult and time-consuming, affecting appearance and perceived quality.
Innovation Solution
A vehicle front end structure with a bumper fascia and grille assembly, where the inner grille member has a support member in a channel of the receiving member, limiting movement and preventing sagging, and the outer grille member conceals the support from view, while snap-fit connections and fastening clips aid in centering and securing the grille.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the grille is designed with large aperture area to maximize air entry, then air flow through the grille is improved, but the grille becomes more susceptible to sagging due to reduced structural support
Solution Approach 1:
The grille is divided into multiple aperture regions separated by structural elements. The inner grille member includes multiple aperture regions that allow air flow while the structural elements between them provide support to prevent sagging. This segmentation allows the grille to maintain both high air flow capability and structural stability.
2Strength
If the grille mass is increased to improve structural rigidity, then sagging resistance is improved, but alignment difficulty with adjacent components increases due to larger tolerances
Solution Approach 1:
A receiving member with a channel is introduced as an intermediary structure between the bumper fascia and the grille. The channel receives and positions the support member of the inner grille member, providing a precise alignment interface that accommodates tolerances in both the grille and adjacent components while preventing excessive gaps.
3Stability of the object's composition
If support structures are added to the grille to prevent sagging, then grille stability is improved, but the support structures become visible and reduce aesthetic appearance
Solution Approach 1:
The support member is nested within the channel of the receiving member, and the outer grille member is positioned to conceal the support member from the forward vehicle facing direction. This nesting arrangement allows the support structure to perform its stabilizing function while remaining hidden, preserving the aesthetic appearance of the grille.
4Quantity of substance
If the grille design maximizes air entry aperture, then cooling efficiency is improved, but the center portion lacks support leading to sagging over time
Solution Approach 1:
The inner grille member features different local qualities: aperture regions for air flow and structural elements for support. The support member is specifically positioned in the center portion where sagging is most likely to occur, providing localized reinforcement that prevents sagging while maintaining large aperture areas in other regions for optimal air entry.
Data Source
AI summary
A vehicle end structure mainly includes a vehicle bumper fascia and a grille assembly. The vehicle bumper fascia includes a sill portion and a receiving member extending from the sill portion. The receiving member defines a channel with an opening extending in a forward vehicle facing direction. The grille assembly includes inner grille and outer grille members that are coupled together. The inner grille member has a support member formed at a periphery of the inner grille member. The support member is disposed in the channel of the receiving member to limit movement of the inner grille member in a direction normal to the forward vehicle facing direction. The outer grille member is disposed on a forward vehicle facing side of the inner grille member to conceal the support member from view in the first direction.