TY - JOUR
T1 - PFI of n-Butanol and Direct Injection of Biodiesel to attain LTC for Low Emissions Idling in a Compression Engine
AU - Soloiu, Valentin
AU - Duggan, Marvin
AU - Harp, Spencer
AU - Vlcek, Brian
AU - Williams, David
PY - 2013/2/19
Y1 - 2013/2/19
N2 - In this study, n-butanol (port fuel injection) PFI was investigated in a direct injection compression ignition engine while at idling speeds, and loads, 1-3 bar IMEP (indicated mean effective pressure) in order to determine the effects on combustion, efficiency, emissions, and specifically, a modified tradeoff of soot and nitrogen oxides. As a result, the engine entered into (low-temperature combustion) LTC regions, for selected loads and speeds. Compared with the baseline taken with ultra-low sulfur diesel no. 2, the heat release with n-butanol in (premixed charge compression ignition) PCCI mode, has resulted in a 75% reduction from the maximum values, while a secondary peak appeared where the diffusion combustion typically occurs in the power stroke. At 3 bar IMEP an early, (bottom dead center) BTDC low-temperature heat release was found that began 6° earlier than for the diesel reference cycle, and corresponding to 1200 K. Soot emissions showed a massive decrease of about 98%, concurrently with a 74% reduction of nitrogen oxides at 3 IMEP by controlling the combustion phases and by modifying the classical NOx-soot tradeoff. The results of this work prove that biodiesel combined with n-butanol PFI in PCCI and LTC are very effective in simultaneously reducing soot and NOx at idling speeds.
AB - In this study, n-butanol (port fuel injection) PFI was investigated in a direct injection compression ignition engine while at idling speeds, and loads, 1-3 bar IMEP (indicated mean effective pressure) in order to determine the effects on combustion, efficiency, emissions, and specifically, a modified tradeoff of soot and nitrogen oxides. As a result, the engine entered into (low-temperature combustion) LTC regions, for selected loads and speeds. Compared with the baseline taken with ultra-low sulfur diesel no. 2, the heat release with n-butanol in (premixed charge compression ignition) PCCI mode, has resulted in a 75% reduction from the maximum values, while a secondary peak appeared where the diffusion combustion typically occurs in the power stroke. At 3 bar IMEP an early, (bottom dead center) BTDC low-temperature heat release was found that began 6° earlier than for the diesel reference cycle, and corresponding to 1200 K. Soot emissions showed a massive decrease of about 98%, concurrently with a 74% reduction of nitrogen oxides at 3 IMEP by controlling the combustion phases and by modifying the classical NOx-soot tradeoff. The results of this work prove that biodiesel combined with n-butanol PFI in PCCI and LTC are very effective in simultaneously reducing soot and NOx at idling speeds.
KW - LTC (low-temperature combustion)
KW - PCCI (premixed charge compression ignition)
KW - PFI (port fuel injection)
KW - n-Butanol combustion
UR - https://digitalcommons.georgiasouthern.edu/mech-eng-facpubs/8
UR - http://dx.doi.org/10.1016/j.energy.2013.01.023
U2 - 10.1016/j.energy.2013.01.023
DO - 10.1016/j.energy.2013.01.023
M3 - Article
SN - 0360-5442
VL - 52
JO - Energy
JF - Energy
ER -