Frontal Center Curtain Airbag Framework Design
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Solution Overview
Problem
Rear seat passengers in vehicles are inadequately protected during head-on collisions due to the lack of effective safety devices, particularly when they do not wear safety belts, leading to secondary collisions with the interior and increased damage.
Innovation Solution
A frontal center curtain airbag apparatus is designed to prevent collisions by deploying an airbag from the roof, using a framework of housing frames, connecting frames, and an airbag door that reinforces the vehicle's body strength, with a gas inflator and guide for uniform gas distribution, and is integrated with the headliner and roof rail brackets for secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rear seat passenger does not wear a safety belt, then the passenger has freedom of movement, but the passenger is vulnerable to secondary collisions with the interior during head-on collisions
Solution Approach 1:
The airbag is pre-installed in the roof and automatically deploys before the passenger can collide with the interior, creating a protective barrier in advance. The system detects collision conditions and inflates the airbag cushion within milliseconds to prevent secondary collisions.
Solution Approach 2:
The airbag acts as an intermediary protective element between the passenger and the vehicle interior. When deployed, the airbag cushion absorbs impact forces and prevents direct contact between the passenger and hard interior surfaces.
2Reliability
If a curtain airbag is installed in the rear seat, then some protection is provided, but the airbag may collide with the passenger during head-on collisions
Solution Approach 1:
Instead of having the airbag emerge from the side or front where it might collide with the passenger, the airbag is inverted to deploy downward from the roof. This reverse deployment direction ensures the airbag approaches the passenger from above rather than from the front, preventing harmful collisions during head-on impacts.
Solution Approach 2:
The airbag is constructed as a flexible thin film cushion that can conform to the passenger's body shape. This flexibility allows the airbag to adapt to the passenger's position and reduce the risk of collision, transforming the rigid potential hazard into a compliant protective surface.
3Object-affected harmful factors
If the airbag is deployed from the roof, then rear seat passengers are protected from interior collisions, but the vehicle interior layout must accommodate the airbag installation
Solution Approach 1:
The airbag housing structure is merged with the vehicle's existing roof framework and headliner assembly. By integrating the airbag mounting structure with the existing roof rails and headliner, the design eliminates the need for separate complex installation structures while maintaining protection functionality.
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 airbag effectively restricts the front deviation of rear seat passengers during collisions, preventing damage from interior collisions and enhancing the vehicle's structural strength without altering the interior layout, while ensuring both lightness and strength through its framework design.
Implementation Method 1
an inflator coupled to one side of the installation space of the housing frames along a lengthwise direction of the housing frames, wherein a gas injection hole of the inflator is located at a middle portion of the housing frames
Data Source
AI summary
A frontal center curtain airbag for a vehicle may include a pair of housing frames spaced from each other in forward and rearward directions to cross the vehicle in a widthwise direction of the vehicle, a plurality of connecting frames connecting upper ends and opposite side ends of the spaced housing frames in forward and rearward directions to form an installation space together with the housing frames, an airbag cushion installed in the installation space and surrounded by the housing frames and the connecting frames, and an airbag door coupled to lower ends of the housing frames and the connecting frames to close a lower end of the installation space.