Simultaneous estimation of soot and diesel contamination in engine oil using electrochemical impedance spectroscopy
2007 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, Vol. 127, no 2, 613-618 p.Article in journal (Refereed) Published
In this paper, we explore the combination of electrochemical impedance spectroscopy and multivariate data analysis to simultaneously predict the concentrations of soot and diesel in engine oil. For this purpose, we use a well defined measurement set-up to minimize interference from ambient noise, and to obtain a large amount of data in a short period of time. An imperative requirement is that soot and diesel affect the impedance in different ways over the employed frequency range. It was, for example, found that diesel had a larger influence at lower frequencies. Using partial least squares modelling we show that it is possible to simultaneously predict the concentrations of both soot and diesel in engine oil. Since the temperature in an engine varies, the influence of the oil temperature is investigated in a preliminary experiment. This study is a part of the development of an electrochemical on-board sensor for real-time monitoring of engine oil.
Place, publisher, year, edition, pages
2007. Vol. 127, no 2, 613-618 p.
Electrochemical impedance spectroscopy, Multivariate data analysis, Engine oil; Diesel, Soot
IdentifiersURN: urn:nbn:se:liu:diva-14886DOI: 10.1016/j.snb.2007.05.014OAI: oai:DiVA.org:liu-14886DiVA: diva2:25501