Flush Glass Assembly Guide System for Wind Noise Reduction
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Solution Overview
Problem
Existing automobile glass guiding and sealing systems fail to achieve a flush relationship between glass windows and vehicle body surfaces, leading to issues like glass chattering on rough roads, binding during operation, and 'blow-out' due to wind pressure differentials.
Innovation Solution
A glass guiding and stabilization system featuring moveable glass pieces with operable connections to retaining structures, including channels with low friction coatings and rigid inserts, which maintain a flush appearance by ensuring smooth sliding and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a flush glass design is implemented to improve aerodynamic and aesthetic characteristics, then the appearance and airflow characteristics are improved, but the glass becomes prone to chattering on rough roads and binding during operation due to inadequate guiding and sealing systems
Solution Approach 1:
The glass guiding system is divided into multiple glass guides positioned at different edges of the glass panel, with each guide providing independent support and sealing. This segmentation allows the glass to maintain flush appearance while having distributed support points that prevent chattering and binding during operation.
Solution Approach 2:
Glass guides are introduced as intermediary components between the glass panel and the vehicle body structure. These guides provide both the sealing function and the mechanical guidance needed to prevent chattering and binding, enabling the flush design to achieve both aesthetic and functional requirements.
2Shape
If the glass window is positioned flush with the body surface to eliminate offset, then aerodynamic characteristics are improved, but wind flow vortex causes pressure differential that leads to glass blow-out
Solution Approach 1:
The sealing system is designed to apply preliminary sealing force to the glass edges before wind pressure differential acts on the flush-mounted glass. This pre-sealing action prevents the glass from blowing out by counteracting the aerodynamic forces that would otherwise cause detachment.
Solution Approach 2:
Glass guides serve as intermediary structures that provide mechanical retention and sealing against wind pressure differentials. These guides prevent direct exposure of the glass edges to aerodynamic forces, allowing the flush design to maintain both aerodynamic efficiency and resistance to blow-out.
3Reliability
If glass guides are used to provide guiding and sealing, then glass stability is improved, but the complexity of the guiding and sealing system increases
Solution Approach 1:
The glass guides are designed to perform multiple functions simultaneously: providing mechanical guidance to prevent chattering, creating seals to prevent binding, and offering structural support for the flush-mounted glass. This multi-functionality reduces the need for separate components, thereby managing system complexity while maintaining high reliability.
Solution Approach 2:
The guiding and sealing functions are merged into a single integrated glass guide component rather than using separate mechanisms. This consolidation simplifies the overall system architecture while providing both guidance and sealing necessary for glass stability in a flush design.
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 system provides a stable and aerodynamic flush glass assembly that reduces wind noise, prevents debris entry, and enhances the aesthetic and functional performance of vehicle glass systems.
Implementation Method 1
a channel including a seal having a low friction coating or other known material that is configured to slideably retain the glass guide
Data Source
AI summary
An automobile flush glass assembly is provided that includes a moveable glass piece having an inboard surface, a front edge and a rear edge and a first glass guide operably connected to the inboard surface of the glass piece proximate the front edge. The assembly also includes a second glass guide operably connected to the inboard surface of the glass piece proximate the rear edge and retaining structures, each having a channel configured to slideably retain the glass guides.