Application of tunable diode laser spectroscopy to the real-time analysis of engine oil economy

Keith R. Carduner; A. D. Colvin; D. Y. Leong; Dennis Schuetzle; Gervase I. Mackay

doi:10.1117/12.46176

1 May 1991 Application of tunable diode laser spectroscopy to the real-time analysis of engine oil economy

Keith R. Carduner, A. D. Colvin, D. Y. Leong, Dennis Schuetzle, Gervase I. Mackay

Proceedings Volume 1433, Measurement of Atmospheric Gases; (1991) https://doi.org/10.1117/12.46176
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

Tunable Diode Laser Spectroscopy (TDLAS) of oil derived SO2 in automotive exhaust demonstrated acceptable repeatability in determination of oil consumption at steady state engine operating conditions. The response time of the instrument was approximately 30 sec, the time related to the flow rate of the sampling system. Instrument sensitivity is sufficient to measure SO2 levels of 0.1 to 1 ppm required to the oil consumption determination. Typical exhaust gas species were investigated for their interference effects and were observed to have less than a 10% interference on the SO2 signal for mixing ratios with SO2 typical of automotive exhaust. Water, on the other hand, did show a significant, but compensatible interference. Carbon deposition under rich engine conditions was observed and is expected to be a problem for any analytical device and is best solved by using a heated sampling line.

Citation Download Citation

Keith R. Carduner, A. D. Colvin, D. Y. Leong, Dennis Schuetzle, and Gervase I. Mackay "Application of tunable diode laser spectroscopy to the real-time analysis of engine oil economy", Proc. SPIE 1433, Measurement of Atmospheric Gases, (1 May 1991); https://doi.org/10.1117/12.46176

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