Gas Generator Igniter Segmentation for Combustion Distribution
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Solution Overview
Problem
In gas generators, the combustion products from explosive combustion often fail to reach the gas generating agents disposed around the igniter effectively, leading to uneven burning and potential incomplete combustion.
Innovation Solution
A separable separating part within the igniter is designed to move and direct combustion products towards the gas generating agents, using a guide and restriction mechanism to ensure proper combustion distribution across the combustion chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the combustion product is released laterally of the explosive accommodating space in a radial pattern, then the flame can be ejected toward the igniter to initiate combustion, but the combustion product cannot directly reach the area below the explosive accommodating space, leading to incomplete combustion of gas generating agent disposed below the igniter
Solution Approach 1:
The igniter is divided into two separable parts: the explosive accommodating space and the separating part. After explosive combustion, the separating part moves away from the explosive accommodating space under pressure from combustion products, creating an open path that allows combustion products to reach areas below the igniter that were previously inaccessible.
Solution Approach 2:
The separating part is designed to be movable rather than fixed. It moves in a predetermined direction when acted upon by combustion products, dynamically changing the combustion chamber configuration to improve combustion product distribution and ensure complete combustion of gas generating agent in all areas including below the igniter.
2Reliability
If the separating part is made movable to improve combustion product distribution, then combustion completeness is enhanced, but the device complexity increases due to the addition of restriction parts and guides
Solution Approach 1:
The igniter is segmented into the explosive accommodating space and the separable separating part. This segmentation allows the separating part to move independently after combustion, creating the necessary flow path without requiring complex mechanical mechanisms, thereby limiting the increase in device complexity.
Solution Approach 2:
The restriction part acts as an intermediary element that controls and guides the movement of the separating part. By providing a simple geometric constraint rather than a complex mechanical linkage, the system achieves controlled movement while minimizing added complexity.
3Volume of moving object
If the gas generating agent is disposed below the explosive accommodating space to optimize space utilization, then the compactness is improved, but the combustion product cannot reach this area effectively, leading to non-uniform combustion
Solution Approach 1:
The separating part moves dynamically after combustion to open a path for combustion products to reach below the explosive accommodating space. This dynamic configuration change allows effective space utilization while ensuring combustion products can reach previously inaccessible areas, maintaining combustion uniformity.
Solution Approach 2:
The separating part moves in a predetermined direction (vertically downward) to create a new flow path dimension. This movement opens a channel that allows combustion products to reach gas generating agent disposed below the explosive accommodating space, ensuring uniform combustion throughout the three-dimensional combustion chamber.
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
This configuration ensures that the gas generating agents are properly burned, reducing non-uniformity in combustion and enhancing the gas generation capability of the gas generator.
Implementation Method 1
a separating part that includes a pressure receiving surface that receives a combustion product generated by a combustion of the explosive at the igniter, the separating part being configured to be separable from the igniter and movable in a predetermined direction by an action of the combustion product on the pressure receiving surface
Implementation Method 2
a guide that directs a combustion product received by the pressure receiving surface toward the igniter
Implementation Method 3
the restriction part restricting a movement of the separating part in the predetermined direction
Implementation Method 4
an ignition portion that is provided in the accommodating chamber and ignites an explosive
Data Source
AI summary
A gas generator including an igniter, a combustion chamber, and a restriction part, the igniter including an accommodating chamber accommodating an explosive therein, an ignition portion provided in the accommodating chamber, and a separating part including a pressure receiving surface, the separating part being configured to be separable from the igniter and movable in a predetermined direction, the combustion chamber being configured to burn a gas generating agent filled outside the accommodating chamber, by the combustion of the explosive, the restriction part provided in a predetermined position in the predetermined direction from the igniter and restricting a movement of the separating part, and the separating part including a guide that directs the combustion product of the explosive by the pressure receiving surface toward the igniter, in a state where the movement of the separating part in the predetermined direction is restricted by the restriction part.