Vehicle Occupant Restraint System with Dynamic Seat Positioning
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Solution Overview
Problem
In vehicle occupant restraint systems, the positional relationship between seats and airbags becomes disrupted when seat positions and angles are freely adjusted, leading to inconsistent airbag deployment timing and potential interference, which can compromise the effectiveness of rear seat airbag support during collisions.
Innovation Solution
A vehicle occupant restraint system that includes an airbag, a region setting unit, a collision sensor, a seat position detection sensor, and a seat control unit, which adjusts the seat position and angle relative to the airbag deployment region to ensure optimal positioning and reduce interference, using a retractable headrest mechanism to support the airbag when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If seat position and angular position are freely changed to conform to occupant body shape or allow comfortable sitting angles, then adaptability and comfort are improved, but the positional relationship between seat and airbag becomes inconsistent, causing interference and reducing restraint reliability
Solution Approach 1:
The system performs preliminary detection of seat position and angular position before airbag deployment. Based on the detected position, the control unit pre-calculates and determines the optimal deployment timing, ensuring that the airbag deploys at the correct moment regardless of seat configuration, thus maintaining restraint reliability while allowing seat flexibility
Solution Approach 2:
The system dynamically adjusts the airbag deployment timing based on real-time seat position detection. The control unit modifies deployment parameters according to the detected seat configuration, enabling the system to adapt to various seat positions while maintaining reliable restraint performance
2Reliability
If seat position is adjusted away from airbag deployment region to reduce interference, then airbag deployment reliability is improved, but the time to start restraint changes and second bag portion support effectiveness may be reduced
Solution Approach 1:
The system detects seat position in advance and pre-calculates the optimal restraint timing based on the detected position. This preliminary action ensures that even when seat position is adjusted to reduce interference, the airbag deploys at the precisely calculated moment, maintaining both deployment reliability and effective restraint timing
Solution Approach 2:
The system continuously monitors seat position and uses this feedback to dynamically adjust deployment timing. The control unit receives real-time position information and modifies deployment parameters accordingly, ensuring that restraint timing remains optimal regardless of seat configuration changes
Data Source
AI summary
A vehicle occupant restraint system includes an airbag configured to deploy downward into a vehicle cabin from a roof of the vehicle cabin by receiving gas supplied, a region setting unit configured to set a predetermined region according to a position of the airbag, a collision sensor configured to detect a collision of a vehicle, a seat position detection sensor configured to detect at least one of a position and an angular position of a seat on which an occupant is seated, and a seat control unit configured to, when the collision sensor detects a collision of the vehicle and the seat position detection sensor detects that the seat is located in the predetermined region, execute control to change at least one of the position and the angular position of the seat. Thus, a positional relation between the seat and the airbag is appropriately controlled.