Igniter Assembly Resin Body Adaptability
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Solution Overview
Problem
Existing igniter units require changes in the connector case shape when different igniter products are used due to varying outer dimensions, making it difficult to easily mount and integrate igniters into internal combustion engine ignition coils.
Innovation Solution
An igniter assembly with a resin body storing the igniter and internal terminal, where the igniter can be easily adapted by changing the body shape without altering the igniter or connector case, and includes a shield layer and elastomer cover for noise shielding and crack prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the connector case shape is changed to accommodate different igniter outer dimensions, then the igniter can be mounted, but the device complexity and manufacturing cost increase
Solution Approach 1:
The system is divided into three independent segments: the igniter package (which varies by product), the body (which provides standardized mounting), and the connector case (which remains unchanged). This segmentation allows the body to serve as a universal interface between different igniter packages and the fixed connector case, resolving the contradiction by enabling product variation without propagating complexity to the connector case.
Solution Approach 2:
The body acts as an intermediary component between the igniter package and the connector case. It absorbs the dimensional variations of different igniter products through its customizable shape, while presenting a standardized interface to the connector case. This mediator role allows compatibility with different igniters without requiring changes to the connector case design.
2Adaptability or versatility
If the igniter package dimensions are varied for different products, then product diversity is achieved, but the ease of manufacture decreases due to custom connector case requirements
Solution Approach 1:
By segmenting the assembly into igniter package, body, and connector case, the system allows mass production of standardized bodies and connector cases, while only the igniter packages need to vary. This reduces manufacturing complexity compared to producing custom connector cases for each igniter type.
Solution Approach 2:
The body is designed as a universal component that can accommodate multiple igniter package types through its standardized interface with the connector case. This multi-functional design enables a single body design to serve multiple product variants, simplifying the manufacturing process.
3Device complexity
If the igniter is exposed without a body, then the structure is simpler, but the shielding against external noise is insufficient
Solution Approach 1:
The igniter package is nested within the body, which in turn is placed within the connector case. This nested arrangement provides progressive shielding: the body offers the first layer of protection against external noise, while the connector case provides an additional layer, effectively protecting the sensitive igniter components without requiring complex shielding structures.
Solution Approach 2:
The body serves as an intermediary shielding layer between the external environment and the igniter package. It absorbs and blocks external noise before it reaches the igniter, while maintaining structural simplicity by using the body's housing rather than adding separate complex shielding components.
Data Source
AI summary
This igniter assembly 220 includes: an igniter 2 provided with a lead terminal 20; a body 1 made of resin and storing the igniter 2; and an internal terminal 3 fixed to the body 1 and having one end electrically connected to the lead terminal 20. The internal terminal 3 has another end extending outward of the body 1.