Passive Fuel Sampling Unit for Sulphur Detection

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Solution Overview

Problem

Existing methods for detecting and analyzing sulphur contaminants and other hazardous compounds in fuel are inadequate, leading to potential damage to vehicles and non-compliance with emission standards, which can result in costly recalls if high sulphur levels are not accurately identified.

Innovation Solution

A passive sampling unit that collects liquid samples over time using temperature variations to determine the level of substances like sulphur, allowing for analysis of fuel composition without requiring maintenance or power, and providing an indication of sulphur levels exceeding approved limits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If active sensors with power supply are used to measure sulphur levels, then direct measurement results are obtained, but device complexity and maintenance requirements increase

Engineering Contradiction:

Improvesulphur level measurementVSAvoidsensor system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The invention extracts the measurement function from an active powered sensor system and implements it through a passive sampling capsule that relies on sulphur absorption chemistry rather than electronic detection, thereby eliminating power supply requirements and reducing device complexity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The sampling capsule is designed as a disposable, low-cost component that is replaced periodically rather than maintained, simplifying the overall system by eliminating complex electronics and power management while enabling straightforward sulphur level assessment

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Reliability

If continuous monitoring of sulphur levels is implemented, then fuel quality compliance is ensured, but energy consumption and system complexity increase

Engineering Contradiction:

Improvefuel quality assuranceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuous monitoring, the system uses periodic sampling where capsules are inserted into the fuel stream at intervals, allowing sulphur accumulation over time, then removed for analysis. This periodic approach ensures fuel quality compliance while consuming minimal energy compared to continuous electronic sensing

Inventive Principle:

Principle #19Periodic action

3Adaptability or versatility

If sampling units are designed for systems with temperature variations, then adaptability to different operating conditions is improved, but device complexity increases

Engineering Contradiction:

Improvetemperature range adaptabilityVSAvoidsampling unit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The sampling capsule design incorporates parameters such as capsule material composition, wall thickness, and internal volume that can be adjusted to accommodate different temperature ranges. These parameter changes allow the same basic capsule design to adapt to various operating conditions without requiring complex temperature control mechanisms

Inventive Principle:

Principle #35Parameter changes

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

Enables continuous, low-cost sampling and analysis of fuel composition, helping to prevent vehicle damage and compliance issues by identifying excessive sulphur levels, thereby ensuring correct fuel usage and reducing the need for costly recalls.

Implementation Method 1

through which the liquid in the cavity may flow out of the cavity when the liquid expands at temperature increases, and through which the liquid in the system may flow into the cavity when the liquid in the cavity is compressed at a temperature drop

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentEP3077787B1Method for analysis of a liquid with a sampling unit for a liquid sample adapted to be fitted into a system with temperature variations

Publication Date: 2021.03.17 SCANIA CV AB

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AI summary

The invention relates to a sampling unit (100) for a liquid sample, preferably for a fuel intended for a combustion engine (2), which sampling unit (100) is adapted to be fitted into a system with temperature variations, which system contains or transports a liquid to be analysed. The sampling device (100) comprises a wall section (104), partly surrounding a cavity (101), which is liquid filled, and an opening (103), through which the liquid in the cavity may flow out of the cavity (101) when the liquid expands at temperature increases and through which the liquid in the system may flow into the cavity (101) when the liquid in the cavity is compressed at a temperature drop. The opening is equipped with a channel (120), which may hold a specified volume of liquid, and which channel (120) is arranged to be in contact with the liquid in the system.