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The Effect of Fuel Aromatic Structure and Content on Direct Injection Diesel Engine Particulates
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1992 by SAE International in United States
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A single cylinder, Cummins NH, direct-injection, diesel engine has been operated in order to evaluate the effects of aromatic content and aromatic structure on diesel engine particulates. Results from three fuels are shown. The first fuel, a low sulfur Chevron diesel fuel was used as a base fuel for comparison. The other fuels consisted of the base fuel and 10% by volume of 1-2-3-4 tetrahydronaphthalene (tetralin) a single-ring aromatic and naphthalene, a double-ring aromatic. The fuels were chosen to vary aromatic content and structure while minimizing differences in boiling points and cetane number. Measurements included exhaust particulates using a mini-dilution tunnel, exhaust emissions including THC, CO2, NO/NOx, O2, injection timing, two-color radiation, soluble organic fraction, and cylinder pressure. Particulate measurements were found to be sensitive to temperature and flow conditions in the mini-dilution tunnel and exhaust system. Repeatable results were only obtained after a set procedure for warm-up and run time were followed which consisted of approximately 1 hour to reach steady state and 25 minutes of sampling. At an engine condition where premix burn fraction was the same for each fuel, particulate measurements showed an increase of 9% for the tetralin doped fuel in comparison to the baseline and naphthalene fuels that were the same.
CitationFukuda, M., Tree, D., Foster, D., and Suhre, B., "The Effect of Fuel Aromatic Structure and Content on Direct Injection Diesel Engine Particulates," SAE Technical Paper 920110, 1992, https://doi.org/10.4271/920110.
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