Vehicle Window Glass With Zoned Tempering for Breakage Integrity
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Solution Overview
Problem
Tempered glass vehicle window glass breaks into many fine fragments upon damage, compromising the integrity of the vehicle window and making it susceptible to intrusion and theft, while maintaining mechanical strength and safety.
Innovation Solution
A vehicle window glass structure comprising outer and inner glass layers with distinct tempered regions, where the first tempered region has a higher surface stress than the second, ensuring larger fragments and maintaining the window's profile integrity upon damage, and a laminated glass configuration for enhanced sound insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tempered glass is used to improve mechanical strength and safety, then the glass breaks into fine fragments which compromises window integrity and increases intrusion risk
Solution Approach 1:
The patent applies different tempering treatments to different regions of the glass. The first region (peripheral area) undergoes strong tempering to provide high strength and safety, while the second region (central area) undergoes weak tempering to maintain larger fragment size and window integrity upon breakage. This local differentiation resolves the contradiction between strength and integrity.
Solution Approach 2:
The glass is divided into two distinct tempered regions with different stress characteristics. The first tempered region has higher surface stress and the second tempered region has lower surface stress. This segmentation allows each region to fulfill different functional requirements, resolving the contradiction between needing high strength and maintaining integrity.
2Strength
If uniform strong tempering is applied to the entire glass surface, then mechanical strength is maximized but fragment size becomes too small compromising security
Solution Approach 1:
Different regions of the glass are assigned different tempering intensities. The peripheral first region receives strong tempering for impact resistance, while the central second region receives weak tempering to produce larger fragments that maintain security. This local quality differentiation resolves the contradiction between impact resistance and intrusion prevention.
Solution Approach 2:
The surface stress parameter is varied across different regions of the glass. The first tempered region has higher surface stress (stronger tempering) while the second tempered region has lower surface stress (weaker tempering). By changing this parameter spatially, the patent achieves both high impact resistance and reduced intrusion risk.
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 solution provides improved mechanical strength, reduced risk of intrusion, and enhanced sound insulation, ensuring driving safety and anti-theft performance while maintaining the vehicle's structural integrity and transparency.
Implementation Method 1
The outer glass has a first tempered region and a second tempered region. The first tempered region is connected to the second tempered region. A surface stress of the first tempered region is greater than a surface stress of the second tempered region.
Data Source
AI summary
Vehicle window glass is provided. The vehicle window glass includes outer glass, inner glass, and an interlayer connected between the outer glass and the inner glass. The outer glass has a first tempered region and a second tempered region. The first tempered region is connected to the second tempered region. A surface stress of the first tempered region is greater than a surface stress of the second tempered region. A vehicle is further provided.