Automotive Instrument Panel Box Sections for Vibration Control
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Solution Overview
Problem
Existing instrument panel systems in vehicles often require special tooling and dual-shot painting to achieve a two-tone effect, and they fail to adequately stabilize the panel against vibrations, leading to undesirable rattles and squeaks due to torsional and longitudinal vibrations.
Innovation Solution
An instrument panel system comprising a cross car beam assembly that supports a lower substrate, forming structural box sections with the upper substrate and defroster nozzle assembly, which increases stiffness and rigidity, and features a two-piece design with differing colors and grains to eliminate the need for additional attachments and finish panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If painting and special tooling are used to produce a two-tone instrument panel, then the aesthetic appearance is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The instrument panel is divided into two separate substrates (upper and lower) that are molded in different colors and assembled together. This segmentation allows each substrate to be manufactured independently with its own color and grain characteristics, eliminating the need for complex painting and dual-shot tooling processes while achieving the desired two-tone aesthetic appearance.
Solution Approach 2:
The upper and lower substrates are combined through mechanical attachment to form a complete instrument panel assembly. This merging of separately manufactured components achieves the two-tone effect without requiring complex integrated tooling or post-manufacturing painting processes.
2Stability of the object's composition
If the instrument panel is attached at the upper cowl area to stabilize it, then the panel position is improved, but torsional and longitudinal vibrations still occur causing rattles and squeaks
Solution Approach 1:
The upper and lower substrates are mechanically combined to form integrated structural box sections that work together as a unified structural system. This merging creates a stiffer assembly that better resists torsional and longitudinal vibrations compared to a single substrate or loosely attached components.
Solution Approach 2:
The instrument panel uses a composite structure consisting of upper and lower substrates forming box sections, which provides enhanced structural integrity and vibration resistance. The composite nature of the assembled panel system improves its ability to withstand vehicle vibrations without generating noise.
3Ease of manufacture
If a single-piece instrument panel is used, then the manufacturing process is simplified, but achieving two-tone appearance and enhanced structural integrity becomes difficult
Solution Approach 1:
The instrument panel is segmented into upper and lower substrates that can be manufactured separately using standard molding processes. This segmentation enables each piece to be optimized for its specific function and aesthetic requirements, including different colors and grains, while simplifying the overall manufacturing approach compared to complex single-piece tooling.
Data Source
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AI summary
An instrument panel system 10 includes box sections 28, 30, 36 that increase the stiffness, rigidity, and natural frequency of the instrument panel system 10. The instrument panel system 10 is formed in two-pieces 14, 16 so as to provide a two-tone appearance with differing die draws and grains.