Instrument Panel Chute and Door Mechanism for Airbag Deployment
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Solution Overview
Problem
Conventional airbag deployment systems in vehicles often result in foam fragmentation and inconsistent opening of the instrument panel during airbag inflation, limiting the size of the airbag and deployment speed.
Innovation Solution
A foam-in-place instrument panel design featuring a housing with a chute and door mechanism, including S-shaped hinges and ridges, allows for bottom-up installation of a larger airbag, concentrating inflation force and reducing foam fragmentation, with a substrate and foam layer configuration that enhances consistent opening and scoring techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional airbag deployment systems are used, then airbags can be deployed, but foam fragmentation and inconsistent opening of the instrument panel occur, limiting airbag size and deployment speed
Solution Approach 1:
The instrument panel is segmented into a housing with a chute and a separate door that can open independently. The airbag is contained within the chute during deployment, allowing the door to open consistently while the airbag expands through the chute opening, preventing foam fragmentation and improving deployment consistency
Solution Approach 2:
The chute acts as an intermediary structure between the airbag and the instrument panel exterior. It channels the expanding airbag in a controlled manner, concentrating inflation force and guiding the deployment path to prevent inconsistent panel opening and foam damage
2Volume of moving object
If larger airbags are installed, then better occupant protection is achieved, but foam fragmentation and panel damage increase
Solution Approach 1:
The housing is divided into a chute portion and a door portion, allowing the airbag to expand within the chute while the door opens separately. This segmentation contains the inflation force within defined boundaries, preventing foam fragmentation even with larger airbag volumes
Solution Approach 2:
The chute provides a localized controlled expansion path for the airbag, concentrating the inflation force in a specific direction toward the door. This localized force concentration prevents diffuse foam fragmentation and allows larger airbags to deploy without damaging the instrument panel
3Reliability
If the airbag is contained within a housing with chute and door, then deployment consistency improves, but device complexity increases
Solution Approach 1:
The chute and door are merged into a single integrated housing structure that is formed as one piece. This merging reduces the number of separate components and assembly steps while maintaining the functional benefits of having both a chute for airbag containment and a door for controlled opening
Solution Approach 2:
The housing structure serves multiple functions simultaneously: it contains the airbag during deployment, provides a chute for controlled expansion, incorporates a hinge mechanism for door opening, and acts as the instrument panel cover. This multi-functionality reduces overall system complexity despite the enhanced deployment consistency
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 design enables quicker and cleaner airbag deployment, reducing foam fragmentation, improving panel opening consistency, and allowing for larger airbag sizes while minimizing damage to the instrument panel.
Implementation Method 1
The housing may include a hinge connecting the door and the chute and elongated along the perimeter of the end of the chute
Data Source
AI summary
An instrument panel includes a housing and an airbag. The housing includes a chute elongated to an end and a door at least partially covering the end of the chute. The airbag is disposed in the chute. The housing includes a first ridge elongated along a perimeter of the end of the chute and a second ridge elongated along a perimeter of the door.