Vehicle Window Beltline Seal with Interlocking End Details
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Solution Overview
Problem
Air leaks and unwanted odors/sounds from vehicle frame cavities into the passenger cabin through gaps around vehicle doors and operable windows, detracting from the driving experience.
Innovation Solution
A vehicle sealing assembly featuring a beltline seal between the door trim and inner frame panels, with front and rear beltline end pieces extending to the window's vertical supports, creating a continuous seal that engages the window's interior surface to block air and noise transfer, achieving a sealing pressure of approximately 1-3 pounds per square inch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a beltline seal is used to seal the gap between door trim and inner frame panels, then air leaks and noise transfer are reduced, but the complexity of the sealing assembly increases due to additional components like front and rear beltline end pieces
Solution Approach 1:
The beltline seal is divided into multiple segments including the main beltline seal body, front beltline end piece, and rear beltline end piece. Each segment serves a specific sealing function in different locations, allowing the seal to conform to the complex geometry of the door cavity while maintaining effective sealing against air leaks and noise transfer.
Solution Approach 2:
The front and rear beltline end pieces are integrally formed with the window's vertical supports, creating a nested structure where the end pieces are embedded within or attached to the window support structure. This integration reduces the number of separate components and simplifies the overall assembly while maintaining sealing effectiveness.
2Object-affected harmful factors
If the beltline seal engages the window's interior surface with high sealing pressure, then the seal effectiveness against air leaks improves, but the flexibility of window operation may be compromised
Solution Approach 1:
The sealing assembly applies pressure locally at the engagement points between the beltline seal and the window's interior surface, rather than applying uniform pressure across the entire window. This localized pressure application ensures effective sealing at critical gaps while allowing the window to move freely in other areas, maintaining operational flexibility.
Solution Approach 2:
The beltline seal is designed with flexible materials and geometry that allow it to dynamically adjust its shape and pressure distribution during window operation. The seal can deform to accommodate window movement while maintaining contact and sealing pressure at the engagement points, ensuring continuous effectiveness throughout the window's range of motion.
3Object-affected harmful factors
If minimal clearance is maintained between the window and door trim panel, then sealing effectiveness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The beltline seal incorporates compliant materials and design features that allow it to adapt to variations in clearance dimensions. By using materials with appropriate durometer and flexibility, the seal can compensate for manufacturing tolerances and maintain effective sealing even when clearance parameters vary within acceptable ranges, reducing the stringency of precision requirements.
Solution Approach 2:
The beltline seal acts as a cushioning element that compensates for potential gaps or irregularities in the assembly. The flexible seal material provides a buffer that maintains sealing pressure despite variations in clearance, effectively cushioning against the effects of manufacturing tolerances and ensuring consistent sealing performance.
Data Source
AI summary
A vehicle sealing assembly includes a vehicle frame defining a frame cavity. A vehicle door has a door trim panel and an inner frame panel that define a door cavity in communication with the frame cavity. An operable window is disposed proximate the door cavity and is operable between open and closed positions. A beltline seal is disposed between the door trim and inner frame panels and in engagement with the operable window in the closed position. A front beltline end piece is integrally formed between a front vertical support of the window and a front end of the beltline seal.