Terahertz Time-Domain Spectroscopy to Discriminate among Water Contamination Levelsin Diesel Engine Oil

2015 ◽  
Keyword(s):  
Diesel Engine ◽  
Time Domain ◽  
Water Contamination ◽  
Engine Oil ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy

scholarly journals Terahertz Time Domain Spectroscopy to Detect Different Oxidation Levels of Diesel Engine Oil

Lubricants ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 18 ◽  
Author(s):  
Ali Abdul-Munaim ◽  
Jan Ornik ◽  
Martin Koch ◽  
Dennis Watson
Keyword(s):  
Refractive Index ◽  
Diesel Engine ◽  
Time Domain ◽  
Measurement Method ◽  
Oxidation Time ◽  
Engine Oil ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Thz Range

Diesel engine oil was subjected to thermal oxidization (TO) for six periods of time (0 h, 24 h, 48 h, 72 h, 96 h, and 120 h) and was subsequently characterized by terahertz time domain spectroscopy (THz-TDS). The THz refractive index generally increased with oxidation time. The measurement method illustrated the potential of THz-TDS when a fixed setup with a single cuvette is used. A future miniaturized setup installed in an engine would be an example of a fixed setup. For the refractive index, there were highly significant differences among the oxidation times across most of the 0.3–1.7 THz range.

Discriminating gasoline fuel contamination in engine oil by terahertz time-domain spectroscopy

2018 ◽  
Vol 119 ◽  
pp. 123-130 ◽  
Author(s):  
Ali Mazin Abdul-Munaim ◽  
Mario Méndez Aller ◽  
Sascha Preu ◽  
Dennis G. Watson
Keyword(s):  
Time Domain ◽  
Engine Oil ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy
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