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Characterization of PCCI Combustion in a Single Cylinder CI Engine Fuelled with RME and Bio-Ethanol
Technical Paper
2013-01-1672
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper reports experiments on a single-cylinder
direct-injection compression ignition engine operating in premixed
charge compression ignition (PCCI) combustion mode. The engine was
fuelled with pure rapeseed methyl ester (RME) and bio-ethanol. RME
was injected in the combustion chamber by common rail (CR)
injection system at 800 bar and bio-ethanol in the intake manifold
by commercial port fuel injection system at 3.5 bar. The effects of
different percentage of bio-ethanol were studied by means of both
the in-cylinder heat release analysis and the high-speed UV-visible
chemiluminescence visualization. The pollutant formation and
exhaust emissions of the engine operating in dual fuel mode were
evaluated.
The increase of the bio-ethanol content improved the brake
thermal efficiency slightly even if the brake fuel consumption
increased. However, the choice to inject two biofuels decreases
both the smoke opacity and NOx concentration. These
results were analyzed considering the data obtained by spectroscopy
measurements in the combustion chamber. In particular, the high
presence of radical species such as OH, HCO, and H₂CO contribute to
describe the chemical reactions and physical processes involved in
dual fuel combustion mode.
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Citation
Mancaruso, E. and Vaglieco, B., "Characterization of PCCI Combustion in a Single Cylinder CI Engine Fuelled with RME and Bio-Ethanol," SAE Technical Paper 2013-01-1672, 2013, https://doi.org/10.4271/2013-01-1672.Also In
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