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Journal of Chemistry
Volume 2015, Article ID 839879, 7 pages
Research Article

Comparative Study on Particles Formation in a Diesel Engine When Lubricating Oil Involved in Fuel Combustion

1School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China
2Laboratory of IC Engine, Xihua University, Chengdu 610039, China
3State Key Laboratory of Engines, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, China

Received 18 January 2015; Accepted 23 February 2015

Academic Editor: Ming Huo

Copyright © 2015 Lihui Dong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The effect of lubricating oil on the morphology of particulate matter (PM) was studied in a diesel engine fueled with pure diesel fuel and blended fuel containing 0.5% by weight of lubricating oil. Particulate matter emitted by diesel engines is formed primarily by soot agglomerates which are composed of primary particles. In this paper, particulate matter was collected with a thermophoretic sampling system, and a high-resolution transmission electron microscope (TEM) was used to investigate the primary particles. A Fast Particulate Spectrometer, DMS 500, was used to determine the particle size distributions. The TEM results indicated that the mean diameters of the primary particles increased after the oil was added into the fuel. Particle size distributions results showed that lubricating oil in the fuel gave rise to a higher concentration in nucleation mode.