Oil Filter Tracer Material for Usage Tracking

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Solution Overview

Problem

Existing fluid filters, particularly oil filters, face challenges in determining when they were last replaced and verifying the brand used, due to lack of tracing mechanisms.

Innovation Solution

Incorporating a tracer material into the filter element, which can be mixed with the filtering material during additive manufacturing or layered within the filter media, allowing the tracer to dissolve into the fluid and provide indication of filter usage and origin.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If traditional filter elements are used without tracer material, then the filter structure remains simple and manufacturing cost is low, but it becomes difficult to determine when the filter was last replaced and verify the brand used

Engineering Contradiction:
Improvefilter usage informationVSAvoidfilter structure
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The filter element incorporates porous tracer material that allows fluid to pass through while retaining tracer particles. The porous structure enables the tracer to be carried by the fluid flow and deposited on downstream surfaces, providing usage information without blocking fluid passage.

Inventive Principle:
Principle #31Porous materials

Solution Approach 2:

The filter element is constructed as a composite structure combining filtering material with tracer material. The tracer material may be mixed within the filter media or applied as a coating, creating a multi-functional composite that simultaneously filters contaminants and provides tracking capability.

Inventive Principle:
Principle #40Composite materials

2Loss of information

If tracer material is incorporated into the filter element, then filter usage and origin can be tracked, but the manufacturing process becomes more complex

Engineering Contradiction:
Improvefilter origin informationVSAvoidmanufacturing process
Core Design Contradiction:
Loss of informationVSEase of manufacture

Solution Approach 1:

The tracer material is integrated into the filter element manufacturing process itself, rather than being added as a separate component. The tracer is mixed with the filter media during formation or applied as a coating in the same production line, combining multiple functions into a single manufacturing step.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The tracer material can be applied selectively to specific regions of the filter element, such as the downstream side or particular zones where tracking information is most valuable. This localized application reduces manufacturing complexity while maintaining effective tracking capability.

Inventive Principle:
Principle #3Local quality

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 tracer material enables tracking of filter usage, wear, and origin, facilitating timely replacement and ensuring the use of appropriate filters, thereby enhancing maintenance efficiency and compliance.

Implementation Method 1

a tracer material configured to dissolve into the liquid as the liquid is passed through the filter element to provide an indication of the amount of liquid that has passed through the filter element

Methodology Applied
Scientific EffectDissolution: Solvation

Data Source

PatentEP3849685B1Oil filter having tracer material
Publication Date: 2025.04.02 CATERPILLAR INC
  • EP3849685B1 patent drawingFigure 1
  • EP3849685B1 patent drawingFigure 2A~2B
  • EP3849685B1 patent drawingFigure 3

AI summary

An oil filter (10) may include a housing (12). The housing (12) may include an inlet (26), an outlet (28), and a filter element (14). The filter element (14) may be located downstream of the inlet (26) and upstream of the outlet (28). Additionally, the filter element (14) may include a filtering material (54) and a tracer material (54).