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THz-TDS for Detecting Glycol Contamination in Engine Oil

Abdulmunem, Oday M. ; Abdul-Munaim, Ali Mazin ; Aller, Mario Mendez ; Preu, Sascha ; Watson, Dennis G. (2024)
THz-TDS for Detecting Glycol Contamination in Engine Oil.
In: Applied Sciences, 2020, 10 (11)
doi: 10.26083/tuprints-00016990
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: THz-TDS for Detecting Glycol Contamination in Engine Oil
Language: English
Date: 15 January 2024
Place of Publication: Darmstadt
Year of primary publication: 2020
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Applied Sciences
Volume of the journal: 10
Issue Number: 11
Collation: 9 Seiten
DOI: 10.26083/tuprints-00016990
Corresponding Links:
Origin: Secondary publication DeepGreen

There continues to be a need for an in-situ sensor system to monitor the engine oil of internal combustion engines. Engine oil needs to be monitored for contaminants and depletion of additives. While various sensor systems have been designed and evaluated, there is still a need to develop and evaluate new sensing technologies. This study evaluated Terahertz time-domain spectroscopy (THz-TDS) for the identification and estimation of the glycol contamination of automotive engine oil. Glycol contamination is a result of a gasket or seal leak allowing coolant to enter an engine and mix with the engine oil. An engine oil intended for use in both diesel and gasoline engines was obtained. Fresh engine oil samples were contaminated with four levels of glycol (0 ppm, 150 ppm, 300 ppm, and 500 ppm). The samples were analyzed with THz-TDS and converted to frequency domain parameters of refractive index and absorption coefficient. While both parameters showed potential, the absorption coefficient had the best potential and was able to statistically discriminate among the four contamination levels.

Uncontrolled Keywords: terahertz, time-domain spectroscopy, engine oil, glycol
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-169904
Additional Information:

This article belongs to the Special Issue THz Spectroscopy: Basic Science and Application

Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 621.3 Electrical engineering, electronics
600 Technology, medicine, applied sciences > 630 Agriculture, veterinary medicine
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) > Terahertz Devices and Systems
Date Deposited: 15 Jan 2024 14:04
Last Modified: 18 Mar 2024 10:09
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/16990
PPN: 516346423
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