Driver Airbag Cushion with Concave Middle Panel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing driver airbag systems are inadequate in preventing neck injuries during Autonomous Emergency Braking (AEB) operations, as the driver's head may rapidly tilt forward and collide with the airbag before it is fully deployed, leading to potential neck injuries.
Innovation Solution
A cushion for the driver airbag apparatus with a middle panel and internal tether that forms a concave shape upon deployment, dividing the cushion into front and rear chambers, and includes deployment pressure distribution panels and adjustable vent holes to distribute gas uniformly, preventing direct contact between the driver's head and the airbag during AEB operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the airbag is deployed rapidly to protect the driver, then the protection effectiveness is improved, but the risk of neck injury increases due to direct contact with the driver's head
Solution Approach 1:
The cushion body is divided into front chamber and rear chamber by a middle panel, allowing the front chamber to deploy first and create a concave shape that prevents direct contact with the driver's head, while the rear chamber provides additional cushioning support
Solution Approach 2:
The internal tether restricts the middle panel to form a concave shape in advance during deployment, creating a protective cavity before the driver's head can make direct contact with the airbag, thereby preventing neck injuries
2Device complexity
If the cushion uses a simple single-chamber structure, then the device complexity is reduced, but the gas pressure distribution becomes uneven causing unstable deployment
Solution Approach 1:
The single chamber is segmented into front chamber and rear chamber with a middle panel, enabling better gas pressure distribution and more stable deployment sequence while maintaining relative structural simplicity
Solution Approach 2:
The middle panel acts as an intermediary element between the front and rear chambers, controlling gas flow and pressure distribution to achieve stable sequential deployment
3Device complexity
If the middle panel is allowed to move freely during deployment, then the device complexity is reduced, but the deployment sequence becomes unstable causing direct driver contact
Solution Approach 1:
The internal tether provides self-constraint to the middle panel during deployment, automatically forming the concave shape through the restriction mechanism without requiring additional complex control systems
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 solution effectively reduces neck injuries by stabilizing the airbag deployment and distributing gas pressure uniformly, preventing direct contact between the driver's head and the airbag, thus minimizing the risk of neck trauma during AEB events.
Implementation Method 1
an inflator which generates gas and a cushion which is expanded and deployed toward a driver seat by the generated gas
Implementation Method 2
an internal tether arranged in the front chamber, and restricting the backward movement of the middle panel such that the middle panel forms a concave shape in the forward direction when the cushion is deployed
Implementation Method 3
a deployment pressure distribution panel installed in the front chamber so as to divide the gas buffering chamber and the flow stabilization chamber. The deployment pressure distribution panel may have a plurality of distribution holes formed therein, and the gas in the gas buffering chamber may be introduced into the flow stabilization chamber through the distribution holes
Data Source
AI summary
A cushion for a driver airbag apparatus may include: a cushion body deployed between a steering wheel and a driver, and including a front chamber contacted with the steering wheel and a rear chamber coming in contact with the driver; a middle panel installed in the cushion body so as to divide the front chamber and the rear chamber, and having an inner vent hole through which gas is introduced from the front chamber to the rear chamber; and an internal tether arranged in the front chamber, and restricting the backward movement of the middle panel such that the middle panel forms a concave shape in the forward direction when the cushion is deployed.