Closed Fuel Test System Pollution Module

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Solution Overview

Problem

Existing test systems for evaluating equipment resistance to fuel contaminants face issues such as the need for an open tank, limited continuous operation, and unpredictable pollution levels due to the introduction of contaminants via containers, which can lead to explosive risks and contaminant deposition.

Innovation Solution

A closed test system with a pollution module comprising vats and an agitating tool that introduces contaminated fuel downstream of the tank, using peristaltic pumps and flexible conduits to ensure continuous operation and precise control of contaminant levels, reducing deposition and maintaining homogeneous contaminant distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If containers with solid contaminants are placed in translation to introduce contaminants to fuel in the tank, then the pollution level can be controlled, but the system cannot operate continuously and exhibits major seesawing variations in pollution level

Engineering Contradiction:
Improvepollution level controlVSAvoidcontinuous operation
Core Design Contradiction:
Measurement precisionVSProductivity

Solution Approach 1:

The patent replaces the discrete container introduction method with a continuous contamination introduction system. A contamination pump continuously pumps contaminated fuel from the contamination tank into the main fuel circulation loop, ensuring uninterrupted operation and eliminating the seesawing variations in pollution levels that occurred with the container method.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The patent replaces the mechanical container dropping system with a fluid-based contamination pump system. This substitution allows for precise control of contaminant introduction rates and enables continuous operation without the interruptions and variations inherent in the mechanical container method.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Quantity of substance

If containers with solid contaminants are used to contaminate fuel, then the pollution level can be introduced, but the pollution level cannot be regulated precisely and exhibits major seesawing variations

Engineering Contradiction:
Improvecontaminant introductionVSAvoidpollution level regulation
Core Design Contradiction:
Quantity of substanceVSMeasurement precision

Solution Approach 1:

The patent incorporates feedback control mechanisms where sensors monitor the pollution level in the fuel and the system automatically adjusts the contamination pump flow rate to maintain the desired pollution level. This closed-loop control eliminates the seesawing variations and enables precise regulation of contaminant concentration.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent changes the parameter of contaminant introduction from discrete container-based dosing to continuous pump-based dosing with variable flow rates. This allows precise control of the pollution level by adjusting pump speed and flow rate, eliminating the major variations that occurred with the container method.

Inventive Principle:
Principle #35Parameter changes

3Ease of manufacture

If the tank is open to allow contaminant introduction, then contaminants can be introduced to fuel, but this contravenes testing rules due to explosion risk

Engineering Contradiction:
Improvecontaminant introduction capabilityVSAvoidexplosion risk
Core Design Contradiction:
Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the contaminant introduction function from the main fuel tank and places it in a separate contamination tank. This separation allows the main tank to remain closed for safety while the contamination tank handles the contaminant introduction process through a controlled pump system, eliminating the explosion risk associated with open tanks.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a contamination pump as an intermediary device between the contamination tank and the main fuel circulation system. This intermediary enables controlled contaminant introduction through a closed system, eliminating the need for open tank access and the associated explosion hazards while maintaining the ability to introduce contaminants.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 system allows for continuous testing with precise control of contaminant levels, reducing deposition and ensuring homogeneous contaminant distribution, enabling efficient evaluation of equipment resistance to fuel contaminants.

Implementation Method 1

an agitating tool, configured to take contaminated fuel from the vat and return it to the vat so as to hydraulically agitate the contaminated fuel in the vat

Methodology Applied
Scientific EffectHydraulic agitation: Turbulence

Implementation Method 2

The pollution module comprises at least one peristaltic pump

Methodology Applied
Scientific EffectPeristalsis: Peristalsis

Data Source

PatentUS9417225B2Test systems and processes for equipment vis-a-vis contaminated fuel
Publication Date: 2016.08.16 SAFRAN AIRCRAFT ENGINES SAS
  • US9417225B2 patent drawing
  • US9417225B2 patent drawing
  • US9417225B2 patent drawing

AI summary

A test system for equipment using fuel, including a closed supply circuit of the equipment configured to supply contaminated fuel to the equipment is provided. The circuit includes at least one tank including fuel, and a pollution module including on or more vats including fuel contaminated by solid contaminants. The module is configured to introduce contaminated fuel to a section of the supply circuit in which the fuel extracted from the tank circulates towards the equipment. The module also includes an agitating tool configured to take contaminated fuel from the vat and return it to the vat, so as to agitate the contaminated fuel in the vat.