Automotive Glass Run Partition Wall Tilt for Noise Reduction
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Solution Overview
Problem
Conventional glass runs for automobiles face difficulties in noise reduction and seal lip section flexibility due to the tilt of partition wall ribs, which hinder effective sealing and sound insulation when the door glass is moved up and down.
Innovation Solution
A glass run design featuring a partition wall with specific reference points that allow the seal lip section to bend easily, incorporating a bottom wall, side walls, and a seal lip section, with the partition wall tilted to facilitate movement and reduce noise intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the partition wall rib is tilted with respect to the width direction only, then noise intrusion is reduced, but the seal lip section cannot bend easily when the door glass moves up and down
Solution Approach 1:
The partition wall is tilted not only in the width direction but also in the longitudinal direction, creating a three-dimensional orientation that simultaneously achieves noise reduction and seal lip flexibility. This dimensional extension resolves the contradiction by adding a new degree of freedom to the partition wall configuration.
Solution Approach 2:
The partition wall adopts an asymmetric tilt configuration where the second reference point or third reference point is positioned lower than the first reference point. This asymmetric arrangement creates favorable stress distribution that enables both noise blocking and seal lip bending during door glass movement.
2Object-affected harmful factors
If the partition wall is tilted in the width direction, then sound insulation is improved, but the seal lip section rigidity is compromised
Solution Approach 1:
By extending the tilt of the partition wall into the longitudinal direction in addition to the width direction, the structure gains enhanced rigidity in the seal lip region while maintaining sound insulation performance. This three-dimensional configuration provides structural reinforcement without compromising acoustic isolation.
Solution Approach 2:
The partition wall exhibits different functional characteristics at different locations: the tilt configuration provides sound insulation in the width direction, while the longitudinal positioning of reference points provides structural support and rigidity where needed, creating local quality variations that satisfy multiple requirements.
Data Source
AI summary
A glass run is attached to a door frame of an automobile to reduce intrusion of noise from an inside of a door of the automobile into an interior of the automobile through the glass run, while allowing a seal lip section to bend easily when a door glass is moved up and down. A partition wall having a reference surface is provided between a vehicle-interior-side seal wall and a vehicle-interior-side seal lip section. The reference surface contains: a first reference point located in the vicinity of a connection portion between the vehicle-interior-side seal lip section and the vehicle-interior-side side wall; a second reference point which is on the vehicle-interior-side side wall and located closer to a bottom wall than the connection portion; and a third reference point located in the vicinity of a tip of the vehicle-interior-side seal lip section.