Seatback Airbag Valve Control for Coordinated Inflation
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Solution Overview
Problem
Current vehicle airbag systems lack efficient control over inflation medium distribution to manage occupant kinematics during impacts, particularly in scenarios where multiple airbags need coordinated inflation to optimize safety and occupant protection.
Innovation Solution
A vehicle system featuring a valve with multiple positions that selectively connects an inflator to either or both airbags, actuated by a computer-controlled motor and pyrotechnically-activated device, allowing for precise control of inflation medium distribution based on impact detection and occupancy status, ensuring coordinated inflation of airbags to manage occupant kinematics effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single inflator is used to supply multiple airbags, then device complexity is reduced, but control precision over inflation medium distribution deteriorates
Solution Approach 1:
The patent segments the inflation medium distribution control by introducing a valve with multiple positions that can selectively connect the single inflator to different airbags. This allows one inflator to be divided into multiple functional pathways, enabling precise control over which airbags receive inflation medium without requiring multiple separate inflators.
Solution Approach 2:
The patent introduces a valve as an intermediary component between the single inflator and multiple airbags. This valve acts as a mediator that directs inflation medium to specific airbags based on impact conditions, thereby achieving precise control distribution without increasing the number of inflators.
2Adaptability or versatility
If multiple actuators are used for valve control, then control versatility is improved, but device complexity increases
Solution Approach 1:
The patent makes the single valve actuator multi-functional by enabling it to assume different positions (first position connecting to first airbag, second position connecting to second airbag, third position connecting to both). This single component performs multiple control functions that would otherwise require separate actuators, thereby achieving control versatility without proportionally increasing device complexity.
Solution Approach 2:
The patent introduces dynamic positioning capability to the valve actuator, allowing it to transition between multiple discrete positions based on real-time impact detection and occupancy status. This dynamic adaptability enables a single actuator to replace multiple static actuators, achieving versatility while maintaining relatively simple device architecture.
3Reliability
If coordinated inflation control is implemented, then occupant safety is improved, but system complexity increases
Solution Approach 1:
The patent implements feedback control by using impact sensors to detect collision conditions and occupancy sensors to detect seat status, then using this information to control the valve positioning and inflator activation. This closed-loop feedback system ensures coordinated inflation of appropriate airbags based on actual impact scenarios, improving occupant safety without requiring overly complex predetermined systems.
Solution Approach 2:
The patent prepares the valve in advance to be positioned in different configurations based on predicted impact scenarios and occupancy patterns. By pre-positioning the valve and having the inflator ready to activate, the system can rapidly respond to impacts with coordinated airbag deployment without requiring complex real-time decision-making during the actual collision event.
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 system enables precise and coordinated inflation of airbags in response to impact and occupancy conditions, enhancing occupant safety by optimizing airbag deployment timing and distribution, thereby improving kinematic control during vehicle impacts.
Implementation Method 1
actuated by a computer-controlled motor and pyrotechnically-activated device
Data Source
AI summary
A vehicle includes a seat assembly having a seat bottom and a seatback. The vehicle includes a middle console adjacent the seat assembly. The vehicle includes an airbag inflatable from an uninflated position to an inflated position. The airbag is supported by the seatback in the uninflated position and the inflated position. The vehicle includes an inflator supported by the middle console, the inflator operatively connected to the airbag to provide inflation medium.