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UV-Visible Spectroscopic Measurements of Dual-Fuel PCCI Engine
ISSN: 1946-3952, e-ISSN: 1946-3960
Published September 11, 2011 by SAE International in United States
Citation: Mancaruso, E. and Vaglieco, B., "UV-Visible Spectroscopic Measurements of Dual-Fuel PCCI Engine," SAE Int. J. Fuels Lubr. 4(2):271-281, 2011, https://doi.org/10.4271/2011-24-0061.
In this work, optical diagnostics were applied in a transparent DI diesel engine equipped with the head of Euro5 commercial engine and the last generation CR injection system. In order to realize the PCCI combustion the injection of neat bio-ethanol was performed in the intake manifold and European commercial diesel fuel was injected into the cylinder. Different amounts of bio-ethanol were injected in order to create PCCI combustion with high levels of pre-combustion mixing, and to ensure low equivalence ratio and low flame temperatures too. UV-Visible imaging and spectroscopic measurements were performed in the engine in order to investigate the autoignition of the charge and the combustion process, respectively. In particular, the detection of the species involved in the combustion, like OH, HCO, and CH, was performed. The relevance of the radicals and species on PCCI were evaluated and compared with the data from thermodynamic analysis.