Holding Sealing Material with Penetration for Exhaust Purification
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Solution Overview
Problem
Conventional exhaust gas purifying apparatuses with catalysts require time to achieve sufficient purification efficiency due to the need for catalyst activation temperature, leading to delayed emission reduction after engine startup.
Innovation Solution
Incorporation of a holding sealing material with inorganic fibers and penetration portions to facilitate the placement of electrode members and sensors, ensuring efficient heat distribution and catalyst activation in electrically heated catalyst converters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a catalyst is supported on the exhaust gas-treating body, then exhaust gas purification ability is improved, but the apparatus requires time to reach catalyst activation temperature and achieve sufficient purification efficiency
Solution Approach 1:
The patent applies preliminary action by providing heating elements (electric heaters or thermal mass) that preheat the exhaust gas-treating body and catalyst before the catalyst needs to activate. This allows the catalyst to reach activation temperature faster, reducing the time delay between engine startup and effective purification. The heating system is activated in advance to prepare the catalyst for immediate operation.
2Temperature
If electrode members and sensors are placed through the casing, then catalyst activation and heat distribution are improved, but the structural integrity and sealing of the casing may be compromised
Solution Approach 1:
The patent uses an intermediary approach by introducing sealing members (such as gaskets or sealing rings) that are placed around the electrode members and sensors where they penetrate the casing. These sealing members maintain the thermal connection for catalyst activation while preventing exhaust gas leakage and preserving the casing's structural integrity. The sealing members act as mediators between the penetrating components and the sealed environment.
3Manufacturing precision
If holding sealing material is used to secure the exhaust gas-treating body, then positioning accuracy is improved, but the material must accommodate penetration portions for electrodes and sensors
Solution Approach 1:
The patent applies porous materials by using a holding sealing material with a porous structure that allows penetration portions for electrode members and sensors. The porous structure enables these components to pass through while the material maintains its sealing and positioning functions. This approach simplifies the overall design by integrating the penetration requirements directly into the material structure rather than adding separate complex components.
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 solution enables rapid catalyst activation and improved exhaust gas purification efficiency immediately after engine startup, enhancing the apparatus's ability to reduce harmful emissions.
Implementation Method 1
The holding sealing material includes inorganic fibers... ensures efficient heat distribution and catalyst activation
Data Source
AI summary
A holding sealing material includes inorganic fibers, a mat shape, a first end face and a second end face and a penetration portion. The mat shape has a width direction, a length direction and a thickness direction. The first end face and the second end face are each provided approximately in parallel with the width direction. The penetration portion penetrates the holding sealing material in the thickness direction.