Vehicle Side Airbag Partitioning Cloth and Tether Design
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Solution Overview
Problem
In existing side airbag devices, the rear bag section with high pressure projects further towards the vehicle front side, potentially affecting occupants in unsuitable positions.
Innovation Solution
A vehicle side airbag device with a bag body partitioned into front and rear sections by a front-rear left-right partitioning cloth, which further partitions the rear section into left and right chambers, and includes tethers to restrict inflation towards the front side, adjusting the inflation thickness and projection of the rear bag section to prevent unwanted contact with occupants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rear bag section is set with higher pressure to improve initial stave restraint performance, then restraint performance for occupants in suitable positions is improved, but the rear bag section projects further toward the vehicle front side and may affect occupants in unsuitable positions
Solution Approach 1:
The rear bag section is divided into left and right chambers by a partitioning wall, allowing independent control of inflation in each chamber. This segmentation enables the airbag to adapt to different occupant positions while maintaining effective restraint, reducing the risk of harmful effects on occupants in unsuitable positions.
Solution Approach 2:
The airbag system uses multiple inflators to dynamically control the inflation pressure and timing of different bag sections. The rear bag section can be inflated to higher pressure for effective restraint when needed, while the front bag section can be controlled to prevent excessive projection toward the vehicle front, adapting to various occupancy scenarios.
2Reliability
If the rear bag section inflates with high pressure to ensure effective restraint, then restraint effectiveness is improved, but the projection amount of the rear bag section toward the vehicle front side increases
Solution Approach 1:
The airbag is divided into front and rear bag sections with different inflation characteristics. The rear bag section can maintain high pressure for effective restraint while the front bag section is designed with lower pressure or restricted inflation, controlling the overall projection amount toward the vehicle front side.
Solution Approach 2:
Different parts of the airbag system have different inflation pressures and characteristics. The rear bag section uses higher pressure for restraint effectiveness, while the front bag section uses lower pressure to limit projection, optimizing both restraint performance and spatial constraints.
3Reliability
If the side airbag deploys toward the vehicle front side to provide restraint, then occupant protection is improved, but the risk of affecting occupants in unsuitable positions increases
Solution Approach 1:
The airbag system uses multiple inflators with different timing and pressure characteristics to dynamically control deployment. The rear bag section deploys with higher pressure for effective restraint, while the front bag section deploys with controlled pressure to prevent excessive forward projection, adapting to various occupancy scenarios.
Solution Approach 2:
The airbag is segmented into front and rear sections that can be controlled independently. This allows the rear section to provide strong restraint force while the front section is limited in its projection, reducing the risk of harmful effects on occupants in unsuitable positions while maintaining 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
The solution effectively suppresses or prevents occupants in unsuitable positions from being affected by the rear bag section by controlling the inflation thickness and projection of the airbag, enhancing occupant safety and restraint performance.
Implementation Method 1
gas generated by the inflator is supplied inside the bag body due to operation of the inflator, and the bag body inflates and deploys
Implementation Method 2
the tether provided to the at least one chamber out of the left and right chambers bears tension, such that inflation of the at least one chamber toward the vehicle front side is restricted
Data Source
AI summary
The present disclosure provides a vehicle side airbag device including: a side airbag, housed inside a side support section of a vehicle seat, that inflates and deploys toward a vehicle front side upon being supplied with gas from an inflator, the side airbag including: a bag body that is formed in a bag shape; a front-rear left-right partitioning cloth that partitions the bag body into a front bag section and a rear bag section, and that partitions the rear bag section into a left and a right chamber in a row along a vehicle width direction in an inflated and deployed state of the bag body; and a tether, provided at at least one chamber of the left or the right chamber, that bears tension in the inflated and deployed state, and that restricts inflation of the at least one chamber toward the vehicle front side.