Automotive Glass Run Noise Insulation Wall Design
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Solution Overview
Problem
The existing glass runs for automobile doors create a large space between the door glass and the inner-cabin side wall, leading to sound penetration and amplification, which increases the sound pressure level inside the vehicle, compromising quietness.
Innovation Solution
A noise insulation wall is integrated or separate from the glass run, protruding at the end of the inner-cabin side wall to close the concave space between the door glass and the inner-cabin side wall, with a distance of 0 to 1 mm from the door glass to effectively reduce sound amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the inner-cabin side wall is made longer than the outer-cabin side wall to provide structural support, then the structural stability is improved, but a large concave space is formed between the door glass and the inner-cabin side wall, causing sound echo and amplification
Solution Approach 1:
A noise insulation wall is introduced as an intermediary element between the door glass and the inner-cabin side wall. This mediator fills the concave space and blocks sound propagation, resolving the sound amplification issue while preserving the structural stability provided by the longer inner-cabin side wall
2Object-affected harmful factors
If a noise insulation wall is added to close the concave space, then sound amplification is reduced, but the device complexity increases
Solution Approach 1:
The noise insulation wall is merged with the inner-cabin side wall, forming an integrated structure. This combination reduces device complexity by eliminating separate components while still achieving the sound insulation function through the integrated 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 noise insulation wall significantly reduces sound pressure levels by minimizing the concave space where sound echoes, thereby enhancing the quietness inside the automobile.
Implementation Method 1
a large space 51 among the door glass 9, the end part 22a of the inner-cabin side wall 22 and the base root of the inner lip 25. The structure hampers quietness. More specifically, as sound penetrates the door glass 9 (in FIG. 13, a solid line is penetrated sound) and enters the space 51, the sound echoes between the inner-cabin side wall 22 and the door glass 9
Data Source
AI summary
A glass run for guiding a door glass in a frame includes: a body having a substantially U-shaped cross-section including an outer-cabin side wall, an inner-cabin side wall longer than the outer-cabin side wall in cross section and a connecting wall which connects the side walls; an outer lip and an inner lip which are slidably brought into contact with the door glass; and a holding lip which extends from an end part of the inner-cabin side wall for fastening an inner-cabin side part of the frame together with the inner-cabin side wall. A noise insulation wall protrudes at least on the end part of the inner-cabin side wall for closing a concave space between an inner-cabin side surface of the door glass and the inner-cabin side wall.