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Effect of Crankcase Oil on the Particle Size Distribution and Total Number Concentration in a Heavy Duty CNG Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 1, 2015 by SAE International in United States
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In this paper, the characteristics of particle size distribution in the exhaust of a turbocharged 5.9 liter Cummins gas engine lubricated by two commonly used oils of different viscometrics (15W-40 and 20W-50) have been investigated. The study also attempts to differentiate the performance of the lubricants on the basis of fuel economy. A test procedure developed in- house was used for the evaluation, wherein the engine was operated at various speeds (1200-2800rpm) and load (25 %, 50% & 75%) conditions. Particle size distribution is measured using Engine Exhaust Particle Sizing Spectrometer (TSI EEPS Model 3090). Results indicate that a majority of the particle emissions are observed in the nucleation region (particle diameter < 50nm) and particle size distribution is found to significantly vary with engine speed. The geometric mean diameter of particles varied between 10-40 nm with maximum diameter observed at medium speed ranges. 15W-40 lubricant was found to have an advantage over 20W-50 with respect to fuel economy, but a clear differentiation in terms of particle emissions could not be established
CitationVijayakumar, V., Tyagi, B., Mathai, R., Singh, S. et al., "Effect of Crankcase Oil on the Particle Size Distribution and Total Number Concentration in a Heavy Duty CNG Engine," SAE Technical Paper 2015-01-2041, 2015, https://doi.org/10.4271/2015-01-2041.
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