Honeycomb Structure with Magnetic Substances for Induction Heating
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Solution Overview
Problem
Current exhaust gas purifying devices face challenges in quickly heating to catalyst activation temperatures and efficiently burning out carbon fine particles, particularly due to prolonged vaporization times and reduced exhaust gas temperatures when installed under the vehicle floor, leading to insufficient purification of harmful components like carbon monoxide, hydrocarbons, and nitrogen oxides.
Innovation Solution
A honeycomb structure with two or more types of magnetic substances, differing in maximum magnetic permeability, Curie point, and intrinsic resistance value, is integrated into the exhaust gas purifying device. This configuration allows for rapid heating to catalyst activation temperatures and effective removal of carbon fine particles through induction heating, utilizing a spiral coil and metal pipe housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the exhaust gas filter is placed at the underfloor position to ensure mounting space, then the degree of freedom in design is improved, but the temperature of exhaust gas decreases and carbon fine particles cannot be burned out
Solution Approach 1:
The magnetic substances are pre-installed within the honeycomb structure before the exhaust gas enters. When induction heating is applied, these pre-positioned magnetic substances immediately generate heat through electromagnetic induction, rapidly raising the exhaust gas temperature to enable carbon fine particle combustion even at the underfloor position where temperature would normally decrease.
2Quantity of substance
If the filter contains a large amount of condensed water, then the vaporization heat requirement increases, but the time to reach catalyst activation temperature becomes excessively long
Solution Approach 1:
The patent replaces conventional thermal heating methods with electromagnetic induction heating. The magnetic substances respond directly to electromagnetic fields, generating heat through hysteresis losses and eddy currents. This substitution enables rapid heating that can quickly vaporize condensed water and reach catalyst activation temperature, dramatically reducing the time loss associated with heating large water quantities.
3Power
If magnetic wire is inserted into cells to enable induction heating, then heating capability is improved, but the structure complexity increases
Solution Approach 1:
The patent utilizes the porous nature of the honeycomb structure by dispersing magnetic fine particles throughout the porous walls and surfaces. This approach eliminates the need for inserting discrete magnetic wires into individual cells. The porous material itself becomes the heating element, maintaining structural simplicity while enabling effective induction heating across the entire honeycomb surface area.
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 significantly reduces the time required to reach vaporization and catalyst activation temperatures, enabling efficient burning and removal of carbon fine particles, thereby improving the purification of exhaust gases and reducing energy consumption.
Implementation Method 1
a current can be passed through the coil on an outer circumference of the honeycomb to increase a wire temperature by induction heating
Implementation Method 2
heating them by electromagnetic induction heating
Implementation Method 3
a current can be passed through the coil on an outer circumference of the honeycomb to increase a wire temperature by induction heating, and its heat can increase a temperature of the honeycomb
Implementation Method 4
The carbon fine particles (soot) collected by the filters are burned out and removed by increasing a temperature of the exhaust gas
Implementation Method 5
heating to a temperature at which water vaporizes
Implementation Method 6
it also requires a longer period of time to reach the catalyst activation temperature
Implementation Method 7
harmful components in the exhaust gas may be discharged without being purified by the catalyst before reaching a catalytic activity temperature
Data Source
AI summary
A pillar shaped honeycomb structure, including: an outer peripheral wall; and a porous partition wall disposed inside the outer peripheral wall, the partition wall defining a plurality of cells, each of the cells extending from one end face to other end face to form a flow path, wherein the plurality of cells include two or more types of magnetic substances in which at least two of a maximum magnetic permeability, a Curie point, and an intrinsic resistance value are different.