Vented Reducing-Agent Injector Gasket for Thermal Management
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Solution Overview
Problem
Existing exhaust-gas posttreatment apparatuses face inefficiencies in heat insulation, leading to heat accumulation and reduced cooling efficiency due to closed heat insulation spaces in reducing-agent injector gaskets, which can cause the urea water solution to deteriorate from high temperatures.
Innovation Solution
A reducing-agent injector gasket with a heat insulation space that communicates with the outside, featuring a first and second plate with openings and bolt insert-through holes, and a heat insulation member that allows for heat radiation, preventing heat transfer from the exhaust pipe to the injector and maintaining the quality of the urea water solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a closed heat insulation space is formed between the first plate and the second plate, then heat insulation function is provided, but heat accumulates in the heat insulation space and cooling efficiency deteriorates
Solution Approach 1:
The heat insulation space is designed with communication holes that allow it to communicate with the outside environment. This creates a porous/vented structure rather than a completely closed space, enabling heat dissipation while maintaining insulation function. The communication holes act as pores that allow controlled heat and fluid exchange with the external environment.
Solution Approach 2:
The harmful heat accumulation is extracted from the heat insulation space through communication holes. By providing exit paths for hot air and gases, the design removes the accumulated heat that would otherwise deteriorate cooling efficiency, while the remaining structure continues to provide thermal insulation.
2Object-affected harmful factors
If the heat insulation space is completely closed, then heat transfer suppression is achieved, but heat accumulation occurs and heat insulation efficiency deteriorates
Solution Approach 1:
The heat insulation space incorporates communication holes creating a vented structure. This porous design allows the space to suppress heat transfer from the exhaust pipe while simultaneously enabling heat dissipation to the external environment, preventing heat accumulation that would reduce insulation efficiency.
Solution Approach 2:
The heat insulation space transitions from a static closed structure to a dynamic open structure with communication holes. This allows the space to adaptively manage heat by permitting controlled exchange with the external environment, maintaining optimal heat insulation efficiency under varying thermal conditions.
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 gasket effectively suppresses heat transfer, enhancing heat insulation efficiency and preventing the urea water solution from deteriorating, while allowing for improved assembly and radiation of heat, thus maintaining the effectiveness of the exhaust-gas posttreatment apparatus.
Implementation Method 1
a heat insulation space that allows at least a part of the heat insulation space to communicate with the outside... effectively suppresses heat transfer from the exhaust pipe to the injector
Implementation Method 2
allowing for improved assembly and radiation of heat... enhancing heat insulation efficiency
Data Source
AI summary
Provided is a gasket effectively suppressing heat transfer from an exhaust pipe with an injector retention section to a reducing-agent injector. The gasket includes a first plate to contact a retaining wall of the injector retention section, the first plate having a first opening allowing the reducing agent to be injected and a first bolt insert-through hole, a second plate disposed closer to the reducing-agent injector than the first plate, the second plate having a second opening allowing the reducing agent to be injected and a second bolt insert-through hole, and a spacing keeping member that retains a spacing between the first and second plates to form a heat insulation space therebetween. The heat insulation space has a shape allowing at least a part of the heat insulation space to communicate with the outside of the gasket between the first and second plates.