Tempered SCR Line with Separate Coupling Housings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing SCR line bundles for internal combustion engines face challenges with insufficient heating, susceptibility to environmental damage, leakage, inflexibility, and high installation costs, particularly due to the use of electrically heated units and hoses that may not provide sufficient heating power and are prone to freeze-up at low temperatures.
Innovation Solution
The design features an SCR line with a first hose for the reducing agent and a second hose for the tempering agent, both enclosed in a pipe, with separate coupling housings and flexible connections, allowing for effective heat transfer and flexible assembly, including rotating and flexure points for improved installation and reduced space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electrically heated units and hoses are used for tempering the SCR system, then heating capability is provided, but the heating power is insufficient under certain circumstances and the system is prone to freeze-up at low temperatures
Solution Approach 1:
The patent employs a hydraulic tempering system where hot coolant fluid is circulated through a tempering agent hose to heat the reducing agent. This hydraulic approach provides sufficient heating power compared to electrical heating, and the continuous fluid circulation prevents freeze-up by maintaining temperature throughout the system.
Solution Approach 2:
The patent introduces a tempering agent (coolant fluid) as an intermediary medium to transfer thermal energy from the hot exhaust stream or engine coolant to the reducing agent. This intermediary enables efficient heat transfer while isolating the reducing agent from direct contact with extreme temperatures, improving tempering effectiveness and reliability.
2Ease of manufacture
If SCR line bundles are designed with fixed assembly structures, then manufacturing is simplified, but installation becomes inflexible and requires relatively large installation space
Solution Approach 1:
The patent incorporates flexible hoses with bending capabilities and adjustable coupling mechanisms that allow the SCR line bundle to be dynamically configured during installation. The hoses can bend and flex to adapt to different spatial arrangements, while maintaining sealed connections, thus enabling installation in various configurations without requiring large installation spaces.
Solution Approach 2:
The SCR line bundle is divided into modular segments with standardized coupling interfaces. This segmentation allows the system to be assembled in different configurations by connecting and disconnecting modules, providing installation flexibility while maintaining manufacturing simplicity through standardized components.
3Reliability
If hoses are enclosed in a pipe with separate coupling housings, then protection and heat transfer are improved, but device complexity increases
Solution Approach 1:
The patent combines the protective pipe enclosure with the coupling housings into an integrated structure where the pipe extends directly into the coupling housings. This merging provides environmental protection while simplifying the overall structure by eliminating separate protective components, thus improving reliability without significantly increasing device complexity.
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
This design ensures adequate tempering of the SCR system, facilitates easy and flexible installation, and reduces manufacturing costs by providing a robust and efficient heat transfer mechanism, while minimizing the need for external heating sources and reducing the risk of damage from environmental factors.
Implementation Method 1
effective heat transfer from the second hose to the first hose
Data Source
AI summary
The invention relates to an SCR line for treatment of exhaust from an internal combustion engine and including a first hose to carry a reducing agent, a second hose to carry a tempering agent and a pipe enclosing the two hoses. The two hoses are arranged in the pipe so as to run side by side in parallel. Each of the same-side ends of the first hose and of the pipe are connected to a reducing agent coupling housing. The ends of the second hose are each connected to a tempering agent coupling part separate from the reducing agent coupling housing. At least one of the reducing agent coupling housings has a through-opening at the outer perimeter. The second hose runs from the interior of the pipe through the through-opening to the outside. Furthermore, the invention relates to an SCR line bundle with an SCR line.