Sock Filter Protector Arcing Wall Limits Fastener Wear
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Solution Overview
Problem
In fluid systems for machines, such as diesel exhaust fluid systems, the sock filter often contacts and wears against fasteners, leading to potential debris or particulate contamination and performance degradation, especially at cold start-ups when DEF can be frozen.
Innovation Solution
A filter protector with a one-piece body having connectors and a body wall that arcs around the center axis, forming channels for the tubes and limiting contact between the sock filter and fasteners, thereby preventing wear and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sock filter is positioned close to the fastener for compact design, then the device complexity is reduced, but the sock filter experiences wear and contamination from contact with the fastener
Solution Approach 1:
A filter protector is introduced as an intermediary component between the sock filter and the fastener. This protector shields the sock filter from contact with the fastener, preventing wear and contamination while maintaining the compact overall structure of the assembly.
Solution Approach 2:
The filter assembly is segmented into distinct functional components: the sock filter for filtration, the fastener for securing, and the filter protector for protection. This segmentation allows each component to perform its specific function without interfering with others, resolving the conflict between compact design and filter reliability.
2Ease of manufacture
If the sock filter contacts the fastener during operation, then the structure remains simple, but debris and particulate contamination occur leading to performance degradation
Solution Approach 1:
The filter protector serves as a mediator that prevents direct contact between the sock filter and fastener during assembly and operation. This intermediary component is simple to manufacture and install, yet effectively eliminates contamination risks while maintaining manufacturing ease.
Solution Approach 2:
The filter protector is installed beforehand to cushion and protect the sock filter from potential contact with the fastener during operation. This preventive measure eliminates contamination before it can occur, while the protector itself remains a simple component that does not complicate the manufacturing process.
3Reliability
If the filter protector includes a body wall arcing about the center axis, then contact between sock filter and fastener is limited, but the device complexity increases
Solution Approach 1:
The filter protector employs a thin-walled cylindrical structure that arcs about the center axis, providing flexible yet effective protection. This shell-like structure limits contact between the sock filter and fastener while maintaining a simple geometric form that does not significantly increase device complexity.
Solution Approach 2:
The cylindrical/arcing geometry of the filter protector body wall provides curved protection around the center axis. This curvature efficiently shields the sock filter from fastener contact in multiple directions while maintaining a simple, manufacturable form that minimizes structural complexity.
Data Source
AI summary
A fluid system for a machine includes a tube assembly and a sock filter enveloping the tube assembly. The fluid system also includes a filter protector adjacent to a fastener in the tube assembly and including a first connector fitted with a first tube, a second connector fitted with a second tube, and a wall that arcs between the first connector and the second connector and limits contact between a sock filter enveloping the tube assembly and the fastener.