Adhesive-Bonded Gas Generator Assembly for Simpler Airbag Manufacturing
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Solution Overview
Problem
Existing gas generators for vehicle safety systems have complex components that require elaborate and expensive connecting technologies, leading to increased costs and complexity.
Innovation Solution
A gas generator design featuring a sleeve, diffuser, and baffle plate with predefined openings, adhesively bonded together to form a simple, interconnected subassembly, reducing the need for complex connections and allowing for efficient displacement during activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex components are used in gas generators, then functional requirements are met, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent merges multiple functional components (sleeve with first flow orifices, diffuser with second flow orifices, and baffle plate with third flow orifices) into a single integrated gas generator structure. This integration maintains all necessary functions while reducing the number of separate parts, thereby lowering manufacturing cost and device complexity without compromising reliability
2Reliability
If multiple separate components are used, then functional requirements are met, but connecting technologies become elaborate and expensive
Solution Approach 1:
The invention combines multiple components into one integrated structure, eliminating the need for elaborate connecting technologies between separate parts. The integrated design allows for simpler manufacturing processes such as stamping or injection molding as a single piece, significantly improving ease of manufacture while maintaining functional reliability
3Ease of manufacture
If components are simply designed with predefined openings, then manufacturing is simplified, but component stability and positioning precision may deteriorate
Solution Approach 1:
By integrating the sleeve, diffuser, and baffle plate into a single component with predefined openings, the invention eliminates positioning errors that would arise from assembling multiple separate parts. The integrated structure ensures precise relative positioning of all openings and flow paths is built-in during manufacturing, maintaining high manufacturing precision while keeping the design simple
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 design simplifies the manufacturing process, reduces costs, and ensures precise interconnection of components, enhancing the gas generator's operational efficiency and safety by maintaining component alignment during both mounting and activation.
Implementation Method 1
the sleeve, the diffusor and the baffle plate being adhesively bonded to each other
Implementation Method 2
an ignition chamber (52) arranged inside the gas generator (10) and including a first propellant (50)
Implementation Method 3
a combustion chamber (56) filled with a second propellant (54)
Implementation Method 4
first flow orifices (68) in the sleeve (60), gas formed in the combustion chamber (56) flowing out of the combustion chamber (56) through second flow orifices (78) in the diffusor (70)
Data Source
AI summary
The invention relates to a gas generator (10), especially for a vehicle safety system, comprising a sleeve (60) positioned inside the gas generator (10) which sleeve has first flow orifices (68) and encloses an ignition chamber (52) including first propellant (50), wherein a combustion chamber (56) filled with a second propellant (54) is connected to the outside of the sleeve (60), the combustion chamber being surrounded by a diffusor (70) located inside the gas generator (10) and having second flow orifices (78), and comprising a baffle plate (12) which has third flow orifices (14) and surrounds the diffusor (70), wherein the sleeve (60), the diffusor (70) and the baffle plate (12) are adhesively bonded to each other.