Adaptive Side Airbag for Vehicle Occupant Protection
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Solution Overview
Problem
Current airbag systems deploy to a fixed condition regardless of the occupant's position, which may not optimally protect both reclined and upright occupants in the event of a side impact.
Innovation Solution
An airbag system that adjusts its deployment configuration based on the vehicle seat's angle, inflating to a first condition for upright occupants and a second, taller condition for reclined occupants, using a release mechanism and sensor system to determine the seat angle and control the airbag's deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the airbag deploys to a fixed deployed condition regardless of seat position, then the device complexity is reduced, but the protection effectiveness for both reclined and upright occupants cannot be optimized simultaneously
Solution Approach 1:
The airbag system transitions from a static fixed deployment configuration to a dynamic adaptive configuration that changes based on detected seat position. The release mechanism allows the airbag to assume different deployed states (first deployed condition for upright occupants, second deployed condition for reclined occupants) based on real-time sensing, making the protection system adaptable to varying occupant positions while maintaining manageable complexity through automated control.
Solution Approach 2:
The system changes the deployment parameter (vertical distance extension) of the airbag based on the seat's recline angle parameter. When the seat is detected to be in a reclined position, the airbag extends a greater vertical distance along the seat back compared to when the seat is upright, thereby optimizing protection for different occupant postures without requiring manual intervention.
2Length of stationary object
If the airbag extends a greater vertical distance for reclined occupants, then the head coverage is improved, but the device complexity increases due to conditional deployment control
Solution Approach 1:
The system performs preliminary detection of the seat's recline angle before deployment occurs. The release mechanism is pre-configured to respond to detected reclined positions by allowing the airbag to extend the greater vertical distance needed for head coverage. This preliminary assessment enables the airbag to automatically assume the appropriate deployed condition (second deployed condition with greater extension) before impact, ensuring head protection without requiring complex real-time adjustment mechanisms during the collision event.
3Adaptability or versatility
If a release mechanism is added to control deployment conditions, then the adaptability to different seat positions is improved, but the device complexity increases
Solution Approach 1:
The release mechanism operates autonomously based on sensor input, detecting the seat's recline angle and automatically determining whether to allow the airbag to deploy to the first or second deployed condition. This self-service capability eliminates the need for manual intervention or complex external control systems, as the mechanism itself performs the adaptation function based on pre-programmed response criteria, thereby improving adaptability while keeping the overall system complexity manageable.
Data Source
AI summary
An apparatus for helping to protect an occupant of a vehicle includes an airbag configured to be mounted to a seat back of a vehicle seat. The airbag is inflatable between the seat back and an adjacent side structure of the vehicle to one of a first deployed condition in which the airbag is configured for a non-reclined condition of the vehicle seat, and a second deployed condition in which the airbag is configured for a reclined condition of the vehicle seat. The airbag is configured to deploy to the first deployed condition in response to determining a non-reclined condition of the vehicle seat and to the second deployed condition in response to determining a reclined condition of the vehicle seat.