Adaptive Airbag Venting via Passive Outer Panel
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Solution Overview
Problem
Conventional airbag systems face inefficiencies in venting capacity, which can lead to increased resistance and potential injury during collisions, as they do not adapt to the size of the occupant or their seating position, and often require complex multi-stage inflators or electrical sensors.
Innovation Solution
An airbag assembly with a modulated venting capacity that adjusts based on the occupant's size and impact location, utilizing an outer panel that obstructs vents upon contact, allowing for adaptive venting without the need for multi-stage inflators or electrical sensors, ensuring optimal pressure distribution during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional airbag systems use fixed venting capacity, then the structure is simple, but the adaptability to different occupant sizes and positions is poor
Solution Approach 1:
The airbag system automatically adjusts venting capacity based on occupant interaction without requiring external sensors or control systems. The outer panel passively responds to occupant size and position, allowing the system to self-regulate venting capacity adaptively.
Solution Approach 2:
The venting capacity transitions from a static fixed design to a dynamic adaptive system. The outer panel moves relative to the vents based on occupant contact, continuously adjusting the venting capacity to match real-time collision conditions and occupant characteristics.
2Adaptability or versatility
If multi-stage inflators are used to adjust venting capacity, then the adaptability improves, but the device complexity and cost increase
Solution Approach 1:
Instead of using complex multi-stage inflators with electrical controls, the system employs a passive mechanical approach where the outer panel automatically adjusts venting capacity through its interaction with the occupant during collision, eliminating the need for active control systems.
Solution Approach 2:
The patent removes the complex multi-stage inflator system and electrical sensor components entirely, extracting only the essential venting function and achieving adaptability through the simpler outer panel mechanism that responds passively to occupant characteristics.
3Ease of manufacture
If fixed venting capacity is used, then the manufacturing is simpler, but the occupant injury risk increases due to non-adaptive pressure
Solution Approach 1:
The system creates locally adapted venting characteristics by positioning vents at different locations on the airbag cushion and using the outer panel to selectively obstruct or open specific vents based on occupant contact location, providing customized pressure distribution for different occupant sizes and positions.
4Object-affected harmful factors
If adaptive venting with sensors is implemented, then the occupant protection improves, but the device complexity and cost increase
Solution Approach 1:
The airbag system eliminates the need for electrical sensors by using the occupant's own physical interaction with the airbag to trigger and control the adaptive venting response. The outer panel's movement in response to occupant contact automatically regulates pressure without requiring detection systems.
Solution Approach 2:
The patent replaces electrical sensor systems and electronic control mechanisms with a purely mechanical passive response system, where the outer panel's physical interaction with the occupant directly controls venting capacity through mechanical movement rather than electronic signaling.
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 adaptive venting system reduces occupant resistance and injury risk by dynamically adjusting air pressure based on occupant size and impact location, providing effective cushioning while eliminating the need for complex sensor systems, thus enhancing safety and cost-effectiveness.
Implementation Method 1
an outer panel coupled to the airbag cushion and configured to direct air from the one or more vents away from the one or more vents and away from the occupant during a collision event
Implementation Method 2
configured to direct air from the one or more vents away from the one or more vents and away from the occupant during a collision event
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A front airbag assembly deployable from a steering wheel or instrument panel of a vehicle. The airbag assembly includes an airbag cushion and an outer panel that is coupled to the airbag cushion to form a channel. The venting capacity of some airbag assemblies can be modulated without input from an electrical sensor. In some circumstances, the venting capacity of the airbag assembly can vary based on whether and where a vehicle occupant strikes the outer panel of the airbag assembly.