—In this paper, the study on the effects of n-butanol
on the combustion process in a DISI engine has been
conducted.Experiments were performed on a direct injection SI
engine operated on gasoline and butanol, with combined
analysis of in-cylinder pressure traces, exhaust emissions and
optical data. The optically accessible power unit was fitted with
a commercial head and a high pressure wall guided injection
system working at 100 bar. The engine speed was set at 2000
rev/min as a representative value for mid-road load automotive
use. Different spark timings were tested. All trials were
performed at close to stoichiometric air-fuel ratio.UV-visible
natural emission spectroscopy was applied to investigate the
formation and the evolution of the main compounds
characterizing the spark ignition and combustion process.
Pollutant measurements (HC, CO and NOx) at undiluted
exhaust, for gasoline and butanol, were correlated with
pressure related data and optical results.
—Spark ignition engines, direct injection,
butanol, optical investigations.
The authors are with Istituto Motori di Napoli – CNR, Via G.Marconi 4,
80125 Napoli, Italy (e-mail: firstname.lastname@example.org)
Cite: C. Tornatore, A. Irimescu, L. Marchitto, S. S. Merola, and G. Valentino, "Combustion Process Analysis in a DISI Engine Fuelled
with N-Butanol through UV-VIS Emission Spectroscopy," International Journal of Engineering and Technology vol. 7, no. 3, pp. 242-248, 2015.