DEF Transfer Connector With Wiper Seal for Clean Port Sealing
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Solution Overview
Problem
Existing diesel fluid exhaust transfer circuits for high horsepower engines face challenges in securely connecting and transferring diesel exhaust fluid, particularly in harsh environments, and fail to provide a robust and residue-free seal, leading to inefficiencies in NOx reduction in SCR systems.
Innovation Solution
The introduction of a fluid transfer connector with an attachment nut and hose adapter featuring an annular wiper seal, which securely connects diesel exhaust fluid devices and hoses, ensuring a residue-free seal by wiping any residue on the port fittings during connection, utilizing stainless steel and/or plastic materials for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing connection methods are used, then the connection process is simple, but the seal is not robust and residue remains on port fittings
Solution Approach 1:
The connector is divided into distinct functional segments: the attachment nut for securing the connection, the hose adapter for interfacing with the port fitting, and the annular wiper seal for cleaning the surface. This segmentation allows each component to perform its specific function effectively, ensuring both robust sealing and residue removal without excessive overall complexity.
Solution Approach 2:
The annular wiper seal performs preliminary cleaning action on the port fitting surface before the final sealing engagement occurs. By wiping away residue during the connection process itself, the system ensures a clean sealing surface is prepared in advance, preventing contamination and ensuring reliable sealing without requiring separate cleaning steps.
2Reliability
If a secure connection is achieved, then fluid transfer reliability improves, but connection time increases
Solution Approach 1:
The connector merges multiple functions into a single integrated component: attachment (via the attachment nut), sealing (via the hose adapter interface), and cleaning (via the annular wiper seal). By combining these functions into one simultaneous operation during connection, the system achieves secure connection without requiring separate sequential steps, thereby minimizing connection time while ensuring reliability.
Solution Approach 2:
The annular wiper seal performs self-service cleaning during the connection process itself, using the motion of connection to activate the wiping action. This eliminates the need for separate manual cleaning operations, allowing the system to achieve both secure connection and clean surfaces in a single automated action, reducing overall connection time.
3Manufacturing precision
If residue is removed from port fittings, then seal quality improves, but additional cleaning mechanisms are required
Solution Approach 1:
The annular wiper seal utilizes a flexible thin film structure that can conform to the port fitting surface and effectively wipe away residue. This flexible membrane approach provides efficient cleaning action with minimal material and structural complexity, achieving high seal quality without requiring complex rigid cleaning mechanisms or multiple components.
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 solution provides a robust, efficient, and long-lasting seal for diesel exhaust fluid transfer, ensuring reliable operation of SCR systems by maintaining a clean and secure connection between diesel exhaust fluid devices, enhancing the transfer of DEF and supporting effective NOx reduction in high horsepower engines.
Implementation Method 1
the annular wiper seal wipes any residue on the port fitting as the fluid conduit is slid over the port fitting
Data Source
AI summary
A diesel exhaust fluid transfer circuit providing a fluid transfer connector for securely connecting a port fitting of a diesel exhaust fluid device to a diesel exhaust fluid hose. The fluid transfer connector comprises an attachment nut attachable to a port fitting of the diesel exhaust fluid device. The fluid transfer connector further comprises a hose adapter including a fluid conduit and an annular wiper seal coaxially aligned with the fluid conduit. With the attachment nut attached to the port fitting, the fluid conduit is slidable over the port fitting and connectable to the attachment nut, and the annular wiper seal wipes any residue on the port fitting as the fluid conduit is slid over the port fitting.