Multi-flap vents for airbag pressure regulation
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Solution Overview
Problem
Conventional airbag vents are inefficient in regulating air pressure during collisions, leading to either excessive force on occupants due to high pressure or inadequate cushioning due to low pressure, and often require complex multi-stage inflators or additional sensors, which increases costs.
Innovation Solution
The airbag vent design features a mechanism with flaps that transition from a closed to an open state in response to pressure buildup and occupant engagement, allowing for adaptive venting without the need for additional sensors or complex inflators, by using overlapping flaps that open to form an aperture for controlled air release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional airbag vents are used to regulate air release, then air pressure can be controlled, but the venting efficiency is insufficient leading to either excessive force on occupants or inadequate cushioning
Solution Approach 1:
The vent is divided into multiple independent flaps (first flap and second flap) that can open and close separately. This segmentation allows for more precise control of air release compared to a single vent opening, enabling better regulation of air pressure and reduction of harmful forces on occupants.
Solution Approach 2:
The flaps are designed to be movable rather than fixed, allowing them to dynamically respond to pressure changes and occupant engagement. The flaps transition between closed and open states based on real-time conditions, optimizing air pressure regulation and minimizing harmful effects throughout the airbag deployment sequence.
2Reliability
If multi-stage inflators or additional sensors are added to improve air pressure control, then cushioning effectiveness can be enhanced, but device complexity and cost increase
Solution Approach 1:
The vent flaps are designed to automatically open and close in response to pressure buildup and occupant engagement without requiring external sensors or complex control systems. The system uses the physical conditions themselves (pressure and contact force) to trigger the venting action, eliminating the need for additional sensors and reducing device complexity while maintaining effective cushioning.
Solution Approach 2:
The flaps act as a mechanical intermediary between the inflation system and the occupant, providing passive adaptive venting. Instead of using electronic sensors and complex inflators, the flaps mechanically respond to pressure and force conditions, serving as a simple yet effective mediator that regulates air release based on real-time physical conditions.
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 design provides optimal air pressure regulation during collisions, reducing the risk of injury by minimizing force on occupants while maintaining effective cushioning, and is cost-effective by eliminating the need for additional sensors and complex inflator systems.
Implementation Method 1
the vent transitions from the closed state to the open state in response to pressure buildup and occupant engagement with the airbag
Implementation Method 2
the inflated airbag cushion may exert a force on an occupant to slow forward motion of the occupant
Data Source
AI summary
A vent for an inflatable chamber, such as an airbag cushion, can include a first flap and a second flap. The first flap and second flap can be opposing and/or overlapping. The first flap and the second flap impede fluid flow through the vent when the vent is in a closed state. Free ends of the first flap and the second flap can be positioned at an exterior of the inflatable chamber when the vent is in the open state.