TY - JOUR
T1 - Syngas (H2/CO) in a spark-ignition direct-injection engine. Part 1
T2 - Combustion, performance and emissions comparison with CNG
AU - Hagos, Ftwi Yohaness
AU - Aziz, A. Rashid A.
AU - Sulaiman, Shaharin A.
N1 - Funding Information:
This work was supported by the STIRF with a fund number: 17/10.11 and Center for Automotive Research and Electric Mobility (CAREM), Universiti Teknologi PETRONAS. The support from Educational Sponsorship Unit, PETRONAS Carigali Sdn Bhd was massive too. The authors extend their acknowledgements.
Publisher Copyright:
© 2014 Hydrogen Energy Publications, LLC.
PY - 2014/10/22
Y1 - 2014/10/22
N2 - The combustion, performance, and emissions of syngas (H2/CO) in a four-stroke, direct-injection, spark-ignition engine were experimentally investigated. The engine was operated at various speeds, ranging from 1500 to 2400 rev/min, with the throttle being held in the wide-open position. The start of fuel injection was fixed at 180° before the top dead center, and the ignition advance was set at the maximal brake torque. The air/fuel ratio was varied from the technically possible lowest excess air ratio (λ) to lean operation limits. The results indicated that a wider air/fuel operating ratio is possible with syngas with a very low coefficient of variation. The syngas produced a higher in-cylinder peak pressure and heat-release rate peak and faster combustion than for CNG. However, CNG produced a higher brake thermal efficiency (BTE) and lower brake specific fuel consumption (BSFC). The BTE and BSFC of the syngas were on par to those of CNG at higher speeds. For the syngas, the total hydrocarbon emission was negligible at all load conditions, and the carbon monoxide emission was negligible at higher loads and increased under lower load conditions. However, the emission of nitrogen oxides was higher at higher loads with syngas.
AB - The combustion, performance, and emissions of syngas (H2/CO) in a four-stroke, direct-injection, spark-ignition engine were experimentally investigated. The engine was operated at various speeds, ranging from 1500 to 2400 rev/min, with the throttle being held in the wide-open position. The start of fuel injection was fixed at 180° before the top dead center, and the ignition advance was set at the maximal brake torque. The air/fuel ratio was varied from the technically possible lowest excess air ratio (λ) to lean operation limits. The results indicated that a wider air/fuel operating ratio is possible with syngas with a very low coefficient of variation. The syngas produced a higher in-cylinder peak pressure and heat-release rate peak and faster combustion than for CNG. However, CNG produced a higher brake thermal efficiency (BTE) and lower brake specific fuel consumption (BSFC). The BTE and BSFC of the syngas were on par to those of CNG at higher speeds. For the syngas, the total hydrocarbon emission was negligible at all load conditions, and the carbon monoxide emission was negligible at higher loads and increased under lower load conditions. However, the emission of nitrogen oxides was higher at higher loads with syngas.
KW - Combustion
KW - Direct-injection
KW - Emission
KW - Performance
KW - Spark-ignition
KW - Syngas
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U2 - 10.1016/j.ijhydene.2014.08.141
DO - 10.1016/j.ijhydene.2014.08.141
M3 - Article
AN - SCOPUS:84913557710
SN - 0360-3199
VL - 39
SP - 17884
EP - 17895
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 31
ER -