Gas Generator Charging Without Dedicated Hole
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Solution Overview
Problem
Conventional gas generators for air bag systems in automobiles require a separate charging hole and complex assembly processes, which increase component count and manufacturing costs, and complicate the assembly process.
Innovation Solution
A method of charging pressurized gas into a gas generator without a dedicated charging hole, by forming a gap between connected components and sealing it after pressurization, allowing for simplified assembly and reduced component count, using a cylindrical guide member to control gas flow and eliminate the need for extreme pressure during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional charging hole and sealing pin are used to charge pressurized gas into the bottle, then the gas can be charged into the pressurized gas chamber, but the number of components increases and the assembly process becomes more complex
Solution Approach 1:
The patent removes the dedicated charging hole and sealing pin from the system. Instead, the gas generating chamber housing itself is used to form a temporary charging passage by positioning it near the opening portion of the pressurized gas chamber housing before final assembly. This extraction of unnecessary components directly reduces part count and simplifies manufacturing while maintaining the gas charging function.
Solution Approach 2:
The gas generating chamber housing serves multiple functions: it acts as both the final sealed component of the gas generator and temporarily functions as a charging passage form when positioned near the opening portion during assembly. This multi-functionality eliminates the need for a separate charging hole, reducing component count while maintaining charging capability.
2Ease of manufacture
If a dedicated charging hole is provided in the pressurized gas chamber housing, then gas charging is straightforward, but the component count and manufacturing cost increase
Solution Approach 1:
The patent merges the charging function with the gas generating chamber housing. The charging passage is formed by the spatial relationship between the gas generating chamber housing and the pressurized gas chamber housing, rather than being a separate component. This merging eliminates redundant parts and reduces manufacturing cost while maintaining the charging function.
Solution Approach 2:
The dedicated charging hole and sealing pin are completely removed from the design. The charging function is achieved through the temporary positioning of the gas generating chamber housing, which forms a passage when placed near the opening portion. This extraction eliminates unnecessary components and reduces manufacturing complexity.
3Ease of operation
If extreme pressure is used during gas charging, then gas can be forced into the chamber, but the assembly process becomes more difficult and requires special equipment
Solution Approach 1:
The gas generating chamber housing is positioned near the opening portion of the pressurized gas chamber housing before gas charging begins. This preliminary positioning creates a temporary charging passage that allows gas to flow in at normal pressure. The final assembly sealing action then completes the charging process without requiring extreme pressure or special equipment.
Data Source
AI summary
The present invention relates to a pressurized gas charging method of charging a gas into the interior of a gas generator which has a pressurized gas chamber having an outer shell formed by a pressurized gas chamber housing, a gas generating chamber having an outer shell formed by a gas generating chamber housing, being connected to an opening portion at one end of the pressurized gas chamber, a diffuser portion having a gas discharge port, being connected to an opening portion at the other end of the pressurized gas chamber, and no charging hole, for charging a pressurized gas, provided in the pressurized gas chamber housing before charging the pressurized gas, comprising:a first step of connecting one of the gas generating chamber housing and the diffuser portion to the opening portion at one end of the pressurized gas chamber housing, which has opening portions at both ends, thereby sealing the opening portion;a second step of disposing the gas generating chamber housing or the diffuser portion, that is not connected in the first step, in the vicinity of the opening portion at the other end of the pressurized gas chamber housing so as to form a gap serving as a gas charging hole;a third step of charging pressurized gas through the gap up to a predetermined pressure; anda fourth step of connecting the unconnected gas generating chamber housing or diffuser portion to the pressurized gas chamber housing to seal the gap.