Gas Generator Diffuser Port Layout for Uniform Discharge Temperature
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Solution Overview
Problem
In gas generators, combustion gas discharged from different ports has varying temperatures due to differing distances through the filter, leading to inconsistent discharge temperatures.
Innovation Solution
A gas generator design with varying total opening areas for gas discharge ports and a cooling filter that adjusts the distance combustion gas traverses, using a filter with a solid cooling portion and annular gaps to control temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a filter is disposed facing multiple gas discharge ports at different distances, then gas generation capability is improved, but discharge temperature consistency deteriorates
Solution Approach 1:
The patent applies local quality by creating different cooling conditions for different discharge ports. The filter is positioned at varying distances from multiple discharge ports, so that gas discharged from ports closer to the filter undergoes more cooling than gas from ports farther away. This intentional local variation in cooling degree allows each port to serve different functional needs while maintaining overall system productivity.
Solution Approach 2:
The patent segments the gas discharge function into multiple ports with different characteristics. Instead of a single discharge port, the system uses multiple ports at different positions relative to the filter, each providing gas with different temperature characteristics. This segmentation allows the system to simultaneously achieve high gas generation capability while providing temperature-diverse discharge streams for different application requirements.
2Temperature
If the total opening area of first gas discharge ports is made different from the second gas discharge ports, then temperature control capability is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the total opening area of different groups of discharge ports. Specifically, the first discharge ports (closer to the filter) have a different total opening area compared to the second discharge ports (farther from the filter). This parameter variation allows precise control over the temperature characteristics of discharged gas by adjusting the flow distribution through different ports, achieving temperature control without adding complex active control systems.
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 design effectively controls the temperature of combustion gas discharge by balancing the flow through different ports, ensuring consistent temperature distribution.
Implementation Method 1
a filter including at least a part accommodated in the accommodating space and facing the plurality of gas discharge ports, the filter including a solid cooling portion that extends from a side of the open end toward a side of the closed end in the diffuser portion and cools a combustion gas of the gas generating agent
Data Source
AI summary
A gas generator includes a housing, an ignition device attached to one end side of the housing, a combustion chamber, a diffuser portion formed on the other end side and including a closed end, an open end, and a side wall positioned between the closed end and the open end, a plurality of gas discharge ports formed in the diffuser portion and including a first gas discharge port having a short distance from the combustion chamber and a second gas discharge port having a long distance from the combustion chamber, and a total opening area of the first gas discharge port and a total opening area of the second gas discharge port are different from each other, and a filter accommodated in the accommodating space, the filter extending from a side of the open end toward a side of the closed end in the diffuser portion.