V-band Radiation Heat Shield for Aftertreatment Sensor Protection
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Solution Overview
Problem
Aftertreatment systems for internal combustion engines face challenges in managing radiative heat transfer, which can exceed operational temperatures and affect sensor assemblies, leading to reduced performance and potential downtime due to increased heat transfer from non-insulated attachment components like v-band clamps.
Innovation Solution
The implementation of a radiation shield with an attachment portion and a thermal barrier portion that diverts radiative thermal energy away from sensor assemblies, creating an air gap insulation volume to reduce convective heat transfer and maintain sensor components within a safe operational range, while allowing for serviceability of aftertreatment components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If v-band clamps are used to couple housings, then ease of assembly is improved, but radiative heat transfer to sensor assemblies increases
Solution Approach 1:
A radiation shield is introduced as an intermediary component between the v-band clamp and the sensor assembly. The shield intercepts radiative heat transfer from the clamp and redirects it away from the sensor, thereby protecting the sensor from thermal damage while preserving the ease of assembly provided by the v-band clamp coupling mechanism.
2Reliability
If radiation shield is added to protect sensor assemblies, then sensor reliability is improved, but device complexity increases
Solution Approach 1:
The radiation shield is constructed as a thin, flexible barrier that can be easily integrated into the existing housing structure. This thin-film approach provides effective thermal protection while minimizing the added complexity and space requirements, allowing the shield to conform to the housing contours without requiring complex mounting mechanisms.
3Temperature
If thermal barrier portion diverts radiative thermal energy, then sensor temperature is reduced, but heat dissipation path is altered
Solution Approach 1:
The radiation shield's thermal barrier portion intercepts harmful radiative heat transfer and redirects it away from the sensor assembly. By converting the harmful direct radiation into a redirected thermal pathway, the system protects the sensor while still allowing heat to dissipate through alternative routes, effectively transforming a thermal threat into a controlled heat management solution.
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 radiation shield effectively reduces radiative heat transfer to sensor assemblies, preventing overheating and maintaining system performance, while allowing for the dissipation of thermal energy away from critical components, thus enhancing the operational reliability of aftertreatment systems.
Implementation Method 1
radiative thermal energy emitted by the v-band clamp
Implementation Method 2
creating an air gap insulation volume to reduce convective heat transfer
Data Source
AI summary
An aftertreatment system can include a radiation shield for reducing and/or redirecting radiative thermal energy. The aftertreatment system can include a first housing, a second housing, a first aftertreatment component, and the radiation shield. The first aftertreatment component is positioned within one of a first interior volume of the first housing or a second interior volume of the second housing. The radiation shield includes an attachment portion and a thermal barrier portion. The attachment portion is coupled to an exterior of the first housing or the second housing. The thermal barrier portion is structured to divert radiative thermal energy in a second direction different than a source direction of the radiative thermal energy.