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Article

Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics

1
Large Engines Competence Center GmbH, Inffeldgasse 19, 8010 Graz, Austria
2
Institute of Organic Chemistry, Graz University of Technology, Stremayrgasse 9/Z4, 8010 Graz, Austria
3
Lubex Consulting e.U., Alanovaplatz 1, 2320 Schwechat, Austria
4
Institute of Combustion Engines and Thermodynamics, Graz University of Technology, Inffeldgasse 19, 8010 Graz, Austria
*
Author to whom correspondence should be addressed.
Lubricants 2022, 10(5), 84; https://doi.org/10.3390/lubricants10050084
Received: 31 March 2022 / Revised: 21 April 2022 / Accepted: 29 April 2022 / Published: 3 May 2022
(This article belongs to the Special Issue Friction and Wear in Vehicles)
Because of the impact of lubrication on the efficiency and the lifecycle cost and emissions, the lubricating-oil consumption (LOC) is one of the key indicators in the research and development of internal combustion engines. State-of-the-art methods for LOC measurement are based on the use of a certain tracer to track the oil consumption. However, all of the currently available tracers have their downsides (e.g., the use of a radioactive tracer, corrosive emissions, etc.). Therefore, in the course of this research project, a new tracer substance that is based on a stable nonradioactive isotope of hydrogen—deuterium—was developed and tested thoroughly. The LOC is monitored by a hydrogen/deuterium isotopic ration in the exhaust gas by using an isotopic water analyzer. Tribologically important properties, such as the viscosity, stability, and compatibility of the tracer were investigated by laboratory experiments by using several tools, such as infrared spectroscopy, gas chromatography, thermogravimetry, etc. The properties relevant to the applicability of the method, such as the accuracy and the reproducibility, were investigated by engine test-bench experiments. Finally, long-term stability tests of the tracer were conducted with a field test. View Full-Text
Keywords: lubrication; oil consumption; tracer; deuterium; infrared spectrometry; gas chromatography lubrication; oil consumption; tracer; deuterium; infrared spectrometry; gas chromatography
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MDPI and ACS Style

Vareka, M.; Rossegger, B.; Novotny-Farkas, F.; Engelmayer, M.; Wimmer, A. Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics. Lubricants 2022, 10, 84. https://doi.org/10.3390/lubricants10050084

AMA Style

Vareka M, Rossegger B, Novotny-Farkas F, Engelmayer M, Wimmer A. Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics. Lubricants. 2022; 10(5):84. https://doi.org/10.3390/lubricants10050084

Chicago/Turabian Style

Vareka, Martin, Bernhard Rossegger, Franz Novotny-Farkas, Michael Engelmayer, and Andreas Wimmer. 2022. "Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics" Lubricants 10, no. 5: 84. https://doi.org/10.3390/lubricants10050084

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