Windshield Retention Bracket Assembly for Frontal Impact Hold
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Solution Overview
Problem
Existing windshield mounting systems fail to effectively retain the windshield during a frontal impact, which can lead to increased risk of injury to passengers and pedestrians.
Innovation Solution
A windshield retention assembly comprising a windshield retention bracket with a lower bracket portion and a tab extended from it, bonded to the windshield with an outer adhesion bead, and fixed to the vehicle's roof panel, enhancing windshield retention during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional urethane sealant mounting system is used, then the installation process is simple, but the windshield retention during frontal impact is insufficient
Solution Approach 1:
The mounting system is segmented into distinct functional components: a retention bracket with upper and lower portions, adhesive beads positioned at specific locations, and a tab extending beyond the windshield edge. This segmentation allows each component to perform its specific function optimally while collectively providing superior impact retention compared to traditional single-system approaches.
2Reliability
If the tab is extended beyond the windshield edge, then the windshield retention during impact is improved, but the device complexity increases
Solution Approach 1:
The tab extends in a third dimension beyond the plane of the windshield edge, creating a lever arm that provides mechanical advantage during impact. This dimensional extension transforms the bracket from a simple bonding support into an active retention mechanism that utilizes leverage to maintain windshield position during frontal collisions.
3Strength
If multiple adhesion beads are used, then the bonding strength is improved, but the manufacturing complexity increases
Solution Approach 1:
Adhesion beads are strategically positioned at specific critical locations rather than uniformly distributed. The outer adhesion bead is positioned at the leading edge where impact forces are greatest, and the inner adhesion bead is positioned at the trailing edge. This localized placement optimizes bonding strength where it is most needed while minimizing overall manufacturing complexity.
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 windshield retention assembly significantly improves windshield retention during frontal impacts, achieving at least 50% retention of the windshield periphery, thereby reducing the risk of injury to vehicle occupants and pedestrians.
Implementation Method 1
an outer adhesion bead bonding the lower bracket portion to the windshield
Data Source
AI summary
A windshield retention assembly includes a windshield, a windshield retention bracket including a lower bracket portion and a tab extended from the lower bracket portion, and an outer adhesion bead bonding the lower bracket portion to the windshield, wherein the tab is extended beyond an edge of the windshield.