Two-way Valve for Multi-chambered Airbag Asymmetric Flow
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Solution Overview
Problem
Existing multi-chamber airbag designs face challenges in achieving asymmetric gas flow rates between chambers to optimize inflation profiles and occupant cushioning, particularly for varying occupant sizes and masses.
Innovation Solution
A valve mechanism is integrated into the airbag, comprising a divider with openings and valve covers that regulate gas flow between chambers, allowing controlled flow from one chamber to another while restricting backflow, with the flow rates adjusted based on pressure differentials and occupant interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a valve mechanism is incorporated to regulate gas flow between chambers, then asymmetric gas flow rates are achieved, but device complexity increases
Solution Approach 1:
The valve mechanism is segmented into multiple functional components: a divider panel with openings, a first cover with a first opening for controlling flow from the first chamber, and a second cover with a second opening for controlling flow from the second chamber. Each component independently regulates flow in one direction, achieving asymmetric flow control through modular segmentation rather than a single complex valve.
Solution Approach 2:
Different openings are provided at different locations and orientations: the first opening in the first cover is positioned to control inflow from the first chamber, while the second opening in the second cover is positioned to control outflow to the second chamber. This local differentiation of opening positions and sizes enables direction-specific flow control, achieving adaptability through localized structural variations.
2Adaptability or versatility
If multiple covers with openings are used to control asymmetric flow, then flow rate adjustment capability is improved, but manufacturing complexity increases
Solution Approach 1:
The first cover and second cover are operatively coupled to the divider panel and to each other, forming an integrated valve assembly. The covers can be manufactured as separate components for quality control but are assembled together to function as a unified flow control system, merging multiple functions (inflow control, outflow control, flow restriction) into a single manufacturable assembly unit.
Solution Approach 2:
The divider panel serves multiple functions: it physically divides the airbag into chambers, provides structural support, and incorporates openings that work with the covers to enable flow control. The covers themselves serve dual purposes of sealing the openings and providing adjustable flow paths. This multi-functionality reduces the need for separate dedicated components, simplifying manufacturing.
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
This solution enables tailored inflation profiles and cushioning effects by adjusting gas flow rates, providing optimal protection for different occupant sizes by maintaining higher pressure in the lower chamber for heavier occupants and softer deployment for lighter ones, enhancing airbag performance and occupant safety.
Implementation Method 1
A valve mechanism is operatively coupled to the divider and has a first cover structured to restrict gas flow from the second chamber into the divider opening
Data Source
AI summary
An airbag includes at least one panel defining an interior of the airbag, and a divider positioned in the interior so as to divide the interior into a first chamber and a second chamber. The divider includes at least one divider opening enabling fluid communication between the first and second chambers. A valve mechanism is operatively coupled to the divider and has a first cover structured to restrict gas flow from the second chamber into the divider opening. The first cover has an opening. A second cover is attached to the first cover and is structured to restrict gas flow through the first cover opening in a direction from the first chamber toward the second chamber.