Inflatable Vest Panels for Vehicle Restraint Load Distribution
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Solution Overview
Problem
Conventional seatbelt systems do not provide adequate protection and flexibility for occupants during vehicle impacts, particularly when seats are rotated or facing different directions, as they are not designed to distribute loads effectively across a large torso area.
Innovation Solution
A restraint system featuring inflatable vest panels and retractable webbings that are communicatively linked with an inflator and control system, allowing for adjustable and customizable protection by distributing load over a larger torso area and reducing torso deflection during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional seatbelt systems are used, then the structure is simple, but the protection adequacy and load distribution capability are insufficient
Solution Approach 1:
The restraint system divides the torso into multiple zones using separate inflatable vest panels for different body regions. Each panel can be independently controlled and inflated to provide targeted protection where needed most during impact, transforming the single conventional seatbelt into a multi-zone protective system that adapts to specific impact scenarios
Solution Approach 2:
The restraint system serves multiple functions: it provides conventional seatbelt restraint through retractable webbings, inflatable cushioning through vest panels, and adaptive load distribution through the control system. This multi-functional approach replaces the single-function conventional seatbelt with a system that can handle various impact orientations and occupant needs
2Adaptability or versatility
If seatbelts are designed for fixed orientations, then the design is straightforward, but the adaptability to rotated seats and various impact orientations is limited
Solution Approach 1:
The restraint system transitions from static conventional seatbelts to dynamic inflatable vest panels that can be activated based on detected impact orientation. The control system monitors seat position and impact direction, then selectively inflates appropriate vest panels to provide optimal protection for the specific scenario, making the system adaptive rather than fixed
Solution Approach 2:
The control system continuously monitors seat orientation and impact conditions, then uses this feedback to determine which vest panels should be inflated. This closed-loop control enables the system to automatically adapt to rotated seats and various impact orientations without requiring manual adjustment by the occupant
3Strength
If load is concentrated at three points (anchor, retractor, buckle), then the seatbelt structure is simple, but the torso deflection and injury risk are reduced inadequately
Solution Approach 1:
The system adds a new dimension of protection by incorporating inflatable vest panels that distribute load across the torso surface area rather than concentrating it at discrete points. This transforms the traditional point-load seatbelt system into a distributed load system that spans multiple dimensions of the torso, reducing pressure points and improving overall protection
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
Enhances occupant safety by providing greater freedom in seat repositioning, reducing injury risk through load distribution and improved protection in various impact orientations, including forward and rearward directions.
Implementation Method 1
distributing load over a larger torso area and reducing torso deflection during impacts
Data Source
AI summary
A restraint system in a vehicle includes a first retractor, a second retractor, a first webbing retractably coupled to the first retractor, a second webbing retractably coupled to the second retractor, a first lower vest panel attached to the first webbing, and a second lower vest panel attached to the second webbing. The lower vest panels are inflatable and releasably attachable to each other.