Effect of lubricating oil volatile fractions on diesel particle emissions

Paper #:
  • 2018-01-0637

Published:
  • 2018-04-03
Abstract:
In this study, the effect of volatile fractions from engine lubricating oil on diesel particle emissions were studied experimentally. One commercial CJ-4 lubricating oil was used and distilled to subtract the different volatile fractions with boiling temperature of 220, 260 and 300 degree Celsius, respectively. Oils derived from this distillation process were applied as the lubricating oil and following engine experiments were comducted. Exhaust analyzer was used to measure the gasous emissions and fast response particulate spectrum equipment was employed to study the size distribution and number concentration of particles in the exhaust. Transmission electron microscopy was used to characterize the size distribution of the primary diesel particles relates to different oil volatile fractions. The data shows that low volatile fractions whose boiling point is higher than 300C contribute to more NOx and HC emissions. Those fractions have a boiling point between 260 and 300 do not affect HC emission too much. As to the primary particles morphology, the results show that the high volatile fractions with boiling point lower than 220 lead to much more small primary particles than the other fractions. Based on the data from different conditions, the working condition of engine dorminate the effects of volatile fractions on the emissions since the temperature changes and leads to different combustion rate of different volatile fractions
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