Induction Heating Emission Control System with Varying Pin Lengths
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Solution Overview
Problem
Conventional catalytic converters in vehicles struggle to maintain optimal temperature for efficient emissions treatment, especially during cold starts, cool-downs, and idling conditions, leading to reduced efficiency in pollutant reduction.
Innovation Solution
An emission control system with a substrate and metal pins of varying lengths, utilizing induction heating and electrohydrodynamic (EHD) heat transfer to rapidly heat the catalytic converter, ensuring consistent temperature maintenance through a controller that adjusts power signals and frequencies to optimize heating patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional catalytic converters are used without induction heating, then the device complexity is low, but the temperature maintenance capability is poor during cold starts and idling conditions
Solution Approach 1:
The emission control device is segmented into multiple regions with different heating requirements. Multiple induction coils are positioned at different locations along the substrate, with each coil independently controllable to address specific thermal needs of different sections, thereby achieving uniform temperature distribution while managing system complexity.
Solution Approach 2:
Different regions of the catalytic converter are provided with different heating characteristics through varying coil configurations and power allocation. The system applies localized heating strategies where specific coils are activated based on the thermal state of corresponding substrate regions, enabling precise temperature control tailored to local requirements.
2Productivity
If induction heating is applied to rapidly heat the catalytic converter, then the productivity of emissions treatment is improved, but the use of energy increases
Solution Approach 1:
The system performs preliminary heating of the catalytic converter using induction coils before the catalyst becomes active. This pre-heating action ensures the substrate reaches light-off temperature quickly, enabling the catalyst to become operational faster and thereby improving overall emissions treatment productivity while managing energy consumption through controlled heating duration.
Solution Approach 2:
The induction heating system operates in periodic cycles rather than continuously. The controller activates induction coils only when temperature thresholds are not met, allowing the system to alternate between heating phases and natural cooling/heat retention phases, thereby reducing overall energy consumption while maintaining productivity.
3Stability of the object's composition
If multiple induction coils are used with selective power allocation, then the temperature distribution uniformity is improved, but the device complexity increases
Solution Approach 1:
The system dynamically adjusts the operation of multiple induction coils based on real-time temperature feedback. The controller selectively activates and deactivates specific coils depending on the thermal state of different substrate regions, creating a dynamic heating strategy that adapts to changing conditions and maintains uniform temperature distribution without requiring all coils to operate simultaneously.
Solution Approach 2:
Temperature sensors positioned at different locations along the substrate provide feedback to the controller about the thermal state of each region. The controller uses this feedback information to make informed decisions about which coils to activate and at what power levels, thereby achieving uniform temperature distribution through closed-loop control while managing system complexity through intelligent decision-making.
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
Enhances the performance of emissions treatment by ensuring the catalytic converter reaches and maintains the light-off temperature quickly, even under challenging conditions, thereby improving pollutant reduction efficiency and maintaining optimal operating temperatures.
Implementation Method 1
an induction heating coil is mounted adjacent to the substrate body for generating a varying electromagnetic field, to obtain a desired heating pattern in the substrate body
Implementation Method 2
an electromagnetic field generator comprising a plurality of coils, wherein the electromagnetic field generator responds to the control signal by generating at least one power signal that is applied to a plurality of coils to cause the induction heating
Implementation Method 3
an induction heating coil is mounted adjacent to the substrate body for generating a varying electromagnetic field, to obtain a desired heating pattern in the substrate body
Data Source
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AI summary
In various embodiments, an electromagnetic field generator generates one or more power signals applied to one or more coils to cause the induction heating of the pins of the emission control device. The pins can have a plurality of differing lengths, and the heating of the pins can cause a first region of the emission control device to heat faster than a second region of the emission control device.