Partitioned Vehicle Windshield for Emergency Escape
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Solution Overview
Problem
Existing vehicle windshields with laminated glass structures, while preventing penetration, can hinder escape when the vehicle rolls over and side doors are blocked, as the impact-absorbing interlayer film makes it difficult to break through the windshield.
Innovation Solution
A vehicle design with a partitioned windshield, where the upper windshield is made of glass and more fragile, allowing escape by human effort, and the lower windshield is made of polycarbonate or laminated glass to resist penetration, ensuring the upper windshield can be broken to facilitate exit when side doors are blocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a laminated glass structure with resin interlayer film is used for the windshield, then penetration resistance is improved, but escape ability deteriorates
Solution Approach 1:
The windshield is divided into two separate windshields (upper windshield and lower windshield) instead of using a single laminated glass structure. This segmentation allows each windshield to have different material properties: the lower windshield uses polycarbonate for penetration resistance while the upper windshield uses glass for ease of breaking during escape situations.
Solution Approach 2:
Different regions of the windshield assembly are assigned different material qualities. The lower windshield is made of polycarbonate with high impact resistance to prevent penetration, while the upper windshield is made of glass that can be easily broken by occupants during emergency escape. Each location has optimized material properties suited to its specific function.
2Ease of operation
If the upper windshield is made of glass for easy breaking, then escape ability is improved, but penetration resistance deteriorates
Solution Approach 1:
The windshield system is segmented into upper and lower portions with different materials. The upper windshield uses glass that can be easily broken for escape, while the lower windshield uses polycarbonate for penetration resistance. This segmentation resolves the contradiction by assigning different material properties to different functional zones.
Solution Approach 2:
The upper windshield region is specifically designed with glass material that has low breaking resistance to facilitate occupant escape, while the lower windshield region uses polycarbonate with high impact resistance. Each local region has material properties optimized for its specific operational requirement.
3Strength
If the lower windshield is made of polycarbonate for penetration resistance, then penetration resistance is improved, but light transmittance deteriorates
Solution Approach 1:
The windshield assembly is segmented into upper and lower portions. The lower windshield uses polycarbonate for penetration resistance, while the upper windshield uses glass with superior light transmittance. This segmentation allows each material to perform its optimal function without compromising the other.
Solution Approach 2:
The lower windshield region is assigned polycarbonate material with high impact resistance to prevent penetration, while the upper windshield region is assigned glass material with high light transmittance. Each local region has material properties optimized for its specific functional requirement, balancing protection and visibility.
Data Source
AI summary
A division bar that divides a front or rear windshield into an upper windshield and a lower windshield is provided, and the upper windshield is more fragile than the lower windshield.