Effective release energy, residual gas, and engine emission characteristics of a V-twin engine with various exhaust valve closing timings
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This article presents a study for determining the effective release energy, residual gas, and peak firing pressure rise of a V-twin engine with various exhaust valve timings. The effect of exhaust valve closing timing (EVCT) on effective release energy, peak firing pressure rise, residual gas, engine performance, and engine emission are completely discussed for the first time. Results show that EVCT had a significant effect on residual gas, peak firing pressure rise, and effective release energy. When the EVCT increased from 10 deg to 90 deg ATDC, the residual gas ratio increased from 0.2 % to 1.7 %. The peak firing pressure rise and effective release energy increased until reaching maximum values of 4.59 bar/deg and 0.64 kJ, respectively, and decreased as the EVCT continued to increase. The engine performed at its optimal efficiency when the EVCT was at 50 deg ATDC. The maximum brake mean effective pressure was 7.74 bar, the minimum brake specific fuel consumption was 399.35 g/kWh, and the maximum engine brake torque was 16.92 Nm. The minimum NOx emission was 7.54 g/kWh at a 30 deg ATDC of EVCT.
KeywordsResidual gas Effective release energy Peak firing pressure rise EVCT Emission characteristics
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This research was financially supported by the Centre for Environmentally Friendly Vehicle as the Global Top Project of KMOE (2016002070009, Development of Engine System and Adapting Vehicle for Model 110cc and 300cc Correspond to EURO-5 Emission). This research was supported by The Leading Human Resource Training Program of Regional Neoindustry through the National Research Foundation of Korea funded by The Ministry of Science, ICT and Future Planning (2016H1D5A1908826).
- H. Modamed Niyaz and A. S. Dhekane, Design optimization of intake port in diesel engine by using CFD analysis, International Journal of Engineering Research & Technology (IJERT), 2 (11) November (2013).Google Scholar
- S. Suhaimi, R. Mamat1 and N. R. Abdullah, Investigation of the effects of inlet system configuration on the airflow characteristics, IOP Conference Series: Materials Science and Engineering, 50 (1) (2013) Doi: 10.1088/1757-899X/50/1/012009.Google Scholar
- A. Mahrous, A. Potrzebowski, M. Wyszynski, H. Xu, A. Tsolakis and P. Luszcz, A modeling study into the effect of variable valve timing on the gas exchange process and performance of a 4-valve DI homogeneous charge compression ignition (HCCI) engine, Energy Conversion and Management, 50 (2) (2009) 393–398, https://doi.org/10.1016/j.enconman.2008.09.018.CrossRefGoogle Scholar
- R. J. Middleton, L. K. M. Olesky, G. A. Lavoie, M. S. Wooldridge, D. N. Assanis and J. B. Martz, The effect of spark timing and negative valve overlap on spark assisted compression Ignition combustion heat release rate, Proceedings of the Combustion Institute, 35 (2015) 3117–3124, https://doi.org/10.1016/j.proci.2014.08.021.CrossRefGoogle Scholar
- S. Szwajaa, E. Ansari, S. Rao, M. Szwaja, K. Grab-Rogalinskia, J. D. Naber and M. Pyrc, Influence of exhaust residuals on combustion phases, exhaust toxic emission and fuel consumption from a natural gas fueled spark-ignition engine, Energy Conversion and Management, 165 (2018) 440–446, https://doi.org/10.1016/j.enconman.2018.03.075.CrossRefGoogle Scholar
- K. Sata, J. Kako, J. Yang, A. Ohata and T. Shen, Effect of transient residual gas fraction for gasoline engines, 7th IFAC Symposium on Advances in Automotive Control, The International Federation of Automatic Control, September 4–7, Tokyo, Japan (2013) https://doi.org/10.3182/20130904-4-JP2042.00026.Google Scholar
- J. Yang, K. Sata, J. Kako, A. Ohata and T. Shen, Statistical model and control of residual gas mass in gasoline engines, 7th IFAC Symposium on Advances in Automotive Control, The International Federation of Automatic Control, September 4–7, Tokyo, Japan (2013) https://doi.org/10.3182/20130904-4-JP-2042.00144.Google Scholar
- C. Guardiola, V. Triantopoulos, P. Bares, S. Bohac and A. Stefanopoulou, Simultaneous estimation of intake and residual mass using in-cylinder pressure in an engine with negative valve overlap, IFAC-Papers OnLine, 49 (11) (2016) 461–468, https://doi.org/10.1016/j.ifacol.2016.08.068.CrossRefGoogle Scholar
- L. M. Olesky, J. B. Martz, G. A. Lavoie, J. Vavra, D. N. Assanis and A. Babajimopoulosd, The effects of spark timing, unburned gas temperature, and negative valve overlap on the rates of stoichiometric spark assisted compression ignition combustion, Applied Energy, 105 (2013) 407–417, https://doi.org/10.1016/j.apenergy.2013.01.038.CrossRefGoogle Scholar
- J. A. P. Rubioa, F. Vera-Garcíab, J. H. Graub, J. M. Cámarab and D. A. Hernandezb, Marine diesel engine failure simulator based on thermodynamic model, Applied Thermal Engineering, 144 (5) November (2018) 982–995, https://doi.org/10.1016/j.applthermaleng.2018.08.096.CrossRefGoogle Scholar
- Z. Petranović, M. Sjerić, I. Taritaš, M. Vujanović and D. Kozarac, Study of advanced engine operating strategies on a turbocharged diesel engine by using coupled numerical approaches, Energy Conversion and Management, 171 (1) September (2018) 1–11, https://doi.org/10.1016/j.enconman.2018.05.085.CrossRefGoogle Scholar
- A. E. Teo, M. S. Chiong, M. Yang, A. Romagnoli, R. F. Martinez-Botas and S. Rajoo, Performance evaluation of lowpressure turbine, turbo-compounding and air-Brayton cycle as engine waste heat recovery method, Energy, 166 (1) January (2019) 895–907, https://doi.org/10.1016/j.energy.2018.10.035.CrossRefGoogle Scholar
- K. Pattas and G. Häfner, Stickoxidbildung bei der ottomotorischen Verbrennung, MTZ Nr., 12 (1973) 397–404.Google Scholar
- A. Onorati, G. Ferrari and G. D’Errico, 1D unsteady flows with chemical reactions in the exhaust duct-system of S.I. engines: Predictions and experiments, SAE Technical Paper (2001) 2001-01-0939.Google Scholar
- D. Agarwal, S. K. Singh and A. K. Agarwal, Effect of exhaust gas recirculation (EGR) on performance, emissions, deposits and durability of a constant speed compression ignition engine, Applied Energy, 88 (8) August (2011) 2900–2907, https://doi.org/10.1016/j.apenergy.2011.01.066.CrossRefGoogle Scholar
- L. Liu, Z. Li, S. Liu and B. Shen, Effect of exhaust gases of exhaust gas recirculation (EGR) coupling lean-burn gasoline engine on NOx purification of lean NOx trap (LNT), Mechanical Systems and Signal Processing, 87, Part B (15) March (2017) 195–213, https://doi.org/10.1016/j.ymssp.2015.12.029.CrossRefGoogle Scholar
- B. Rohani and C. Bae, Effect of exhaust gas recirculation (EGR) and multiple injections on diesel soot nano-structure and reactivity, Applied Thermal Engineering, 116, April (2017) 160–169, https://doi.org/10.1016/j.applthermaleng.2016.11.116.CrossRefGoogle Scholar