Annular Doser Mount Structure for Exhaust Heat Isolation
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Solution Overview
Problem
Heat from the exhaust system is transferred to the dosing module in exhaust aftertreatment systems, potentially damaging it and affecting the performance and efficiency of the system.
Innovation Solution
A doser mount with an annular body and protruding legs and projections is used to reduce heat transfer to the dosing module by increasing air movement and distance of heat transfer paths, minimizing direct contact, and incorporating heat-resistant seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dosing module is placed close to the exhaust system to improve performance, then the system efficiency is enhanced, but the dosing module is damaged by heat transfer from the exhaust system
Solution Approach 1:
The doser mount acts as an intermediary component between the exhaust system and the dosing module. It incorporates heat-resistant seals and thermal barriers that allow the dosing module to be positioned close to the exhaust system for improved performance while protecting it from damaging heat transfer through the mount's thermal management features.
Solution Approach 2:
The doser mount changes the thermal parameters of the interface between the exhaust system and dosing module. By using materials with appropriate thermal conductivity and designing the mount geometry to control heat flow paths, it allows close positioning while maintaining the dosing module's temperature within safe operating limits.
2Device complexity
If direct contact between the exhaust system and dosing module is used to simplify the structure, then the device complexity is reduced, but heat transfer damages the dosing module
Solution Approach 1:
The doser mount is segmented into multiple functional zones: an annular body portion that interfaces with the exhaust system, legs that provide structural support and positioning, and projections that create thermal barriers. This segmentation allows each part to address specific requirements while collectively reducing heat transfer to the dosing module.
Solution Approach 2:
The doser mount applies local quality by having different regions with different thermal properties. The annular body portion has heat-resistant characteristics where it contacts the exhaust system, while the legs and projections are designed to minimize heat conduction paths to the dosing module, creating localized thermal management zones.
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 doser mount effectively reduces heat transfer to the dosing module, allowing it to operate in high-temperature environments without damage, enhancing system efficiency and enabling closer placement to heat sources for improved performance.
Implementation Method 1
reduce heat transfer to the dosing module by increasing air movement
Implementation Method 2
minimizing direct contact
Data Source
AI summary
A doser mount includes an annular body portion, a plurality of legs, and a plurality of projections. The annular body portion defines a central cavity. The plurality of legs protrude from a lower surface of the annular body portion and are configured to be coupled to an outer surface of an exhaust conduit. The plurality of projections extend from an upper surface of the annular body at a plurality of circumferential positions of the upper surface of the annular body.