Holding Sealing Material Void Design for Exhaust Purification
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Solution Overview
Problem
Conventional exhaust gas purifying apparatuses with electrically heated catalyst converters face challenges in manufacturing, as existing methods do not provide a straightforward way to dispose electrode members and sensors within the apparatus without complex processes that can reduce the retention and tensile strength of the holding sealing material.
Innovation Solution
A holding sealing material with a mat-shaped structure featuring parallel end faces and a void-forming section allows for the easy disposition of electrode members and sensors by forming a void when rolled up, eliminating the need for through holes and maintaining the material's retention and tensile strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If through holes are formed in the holding sealing material to dispose electrode members and sensors, then the ease of manufacture is improved, but the retention and tensile strength of the holding sealing material deteriorate
Solution Approach 1:
The holding sealing material is designed with a porous structure containing multiple voids distributed throughout its volume. These voids provide spaces for disposing electrode members and sensors without requiring through holes that would compromise the material's retention and tensile strength. The porous structure allows easy insertion of components while maintaining the integrity and strength of the sealing material.
2Manufacturing precision
If complex manufacturing processes are used to dispose electrode members and sensors, then the manufacturing precision may be improved, but the device complexity increases
Solution Approach 1:
The holding sealing material is segmented into multiple regions containing voids at different positions, allowing electrode members and sensors to be disposed in separate, predetermined locations. This segmentation enables straightforward assembly without complex manufacturing processes, as each component can be independently positioned within its designated void space.
3Strength
If the holding sealing material structure is simplified to eliminate through holes, then the retention and tensile strength are improved, but the ease of manufacture of electrode member disposition deteriorates
Solution Approach 1:
The holding sealing material incorporates a porous structure with multiple internal voids that provide easy access points for disposing electrode members and sensors. This porous design maintains the material's retention and tensile strength by avoiding through holes, while simultaneously simplifying the manufacturing process by providing predetermined spaces for component insertion.
Data Source
Figure 1
Figure 2(a)~2(b)
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AI summary
The present invention is to provide a holding sealing material (10A) at which an electrode and/or a sensor (140A) can be easily disposed, an exhaust gas purifying apparatus, and a method for manufacturing an exhaust gas purifying apparatus. A mat-shaped holding sealing material (10A) including inorganic fibers, including a first end face (11A) and a second end face (12A) which are parallel in a width direction (W1) of the holding sealing material (10A), and a contact section (14A,14C) including a portion with a longest distance between the first end face (11A) and the second end face (12A) in a length direction of the holding sealing material (10A) and a void-forming section (14B) which is shorter than the contact section in the distance between the first end face (11A) and the second end face (12A) in a length direction of the holding sealing material (10A), wherein a void (15A) is formed in a neighborhood of the first end face (111B) of the void-forming section and the second end (112B) of the void-forming section.