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The impact of a two-phase diesel fuel pilot injection on the compressed natural gas air–fuel mixture combustion process in a diesel engine

    Risto Ilves Affiliation
    ; Rauno Põldaru Affiliation
    ; Andres Annuk Affiliation
    ; Jüri Olt Affiliation

Abstract

Nowadays, there is a global trend towards the use of alternative fuels in order to reduce environmental pollution. For example, Compressed Natural Gas (CNG) has become more widely used around the world. The use of different fuels in engines affects the combustion process and efficiency, with the latter potentially being reduced by such means as, for example, the use of gaseous fuels in conventional diesel engines. Therefore, it is also important to know how CNG combusts in a diesel engine and how the combustion process can be improved. Consequently, the aim of the study is to give an overview of the effect of divided Diesel Fuel (DF) pilot injection on the combustion process of a naturally aspirated diesel engine using dual-fuel mode, with one fuel being DF and the other CNG. The focus of the article is on the commonly used engines on which the diesel injection system works regularly, and CNG fuel is injected into the intake manifold as an additional fuel. The engine DF quantity and injection timing are regulated by the acceleration pedal. The article provides an overview of the diesel and dual-fuel combustion process, and compare the DF and dual-fuel combustion processes. For this purpose, a test was carried out in order to measure the various involved parameters, such as the combustion pressure, torque, and fuel consumption. The results demonstrated that ignition delay does not significantly vary with the use of gas as a fuel source, and the maximum combustion pressure is actually higher with gas. The combustion is more rapid in dual-fuel mode and results indicate that when using dual-fuel mode on regular engines, it would be necessary to regulate the pre- and main-injection timing.

Keyword : heat release, combustion pressure, relative heat release, dual-fuel engine, gaseous fuel

How to Cite
Ilves, R., Põldaru, R., Annuk, A., & Olt, J. (2022). The impact of a two-phase diesel fuel pilot injection on the compressed natural gas air–fuel mixture combustion process in a diesel engine. Transport, 37(5), 330–338. https://doi.org/10.3846/transport.2022.17938
Published in Issue
Dec 20, 2022
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This work is licensed under a Creative Commons Attribution 4.0 International License.

References

Abdelaal, M. M.; Hegab, A. H. 2012. Combustion and emission characteristics of a natural gas-fueled diesel engine with EGR, Energy Conversion and Management 64: 301–312. https://doi.org/10.1016/j.enconman.2012.05.021

Azimov, U.; Tomita, E.; Kawahara, N.; Harada, Y. 2011. Premixed mixture ignition in the end-gas region (PREMIER) combustion in a natural gas dual-fuel engine: operating range and exhaust emissions, International Journal of Engine Research 12(5): 484–497. https://doi.org/10.1177/1468087411409664

Heywood, J. B. 2018. Internal Combustion Engine Fundamentals. 2nd Edition. McGraw Hill. 1056 p.

Ilves, R.; Küüt, A.; Olt, J. 2019. Ethanol as internal combustion engine fuel, in A. Basile, A. Iulianelli, F. Dalena, T. N. Veziroğlu (Eds). Ethanol: Science and Engineering, 215−229. https://doi.org/10.1016/B978-0-12-811458-2.00008-0

Imran, S.; Emberson, D. R.; Ihracska, B.; Wen, D. S.; Crookes, R. J.; Korakianitis, T. 2014. Effect of pilot fuel quantity and type on performance and emissions of natural gas and hydrogen based combustion in a compression ignition engine, International Journal of Hydrogen Energy 39(10): 5163–5175. https://doi.org/10.1016/j.ijhydene.2013.12.108

Ismail, M. M.; Fawzi, M.; Zulkifli, F. H.; Osman S. A. 2018. CNG-diesel dual-fuel controlling concept for common rail diesel, International Journal of Integrated Engineering 10(3): 88–92. https://doi.org/10.30880/ijie.2018.10.03.015

Karim, G. A. 2003. Combustion in gas fueled compression: ignition engines of the dual-fuel type, Journal of Engineering for Gas Turbines and Power 125(3): 827–836. https://doi.org/10.1115/1.1581894

Kägo, R.; Ilves, R.; Küüt, A.; Olt, J. 2019. A Review of the behavior of fuel drops in a fuel spray in the context of biofuels, Journal of Power Technologies 99(3): 218−230. Available from Internet: https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1488

Korakianitis, T.; Namasivayam, A. M.; Crookes, R. J. 2011. Diesel and rapeseed methyl ester (RME) pilot fuels for hydrogen and natural gas dual-fuel combustion in compression–ignition engines, Fuel 90(7): 2384–2395. https://doi.org/10.1016/j.fuel.2011.03.005

Küüt, A.; Ilves, R.; Küüt, K.; Raide, V.; Ritslaid, K.; Olt, J. 2017. Influence of European Union directives on the use of liquid biofuel in the transport sector, Procedia Engineering 187: 30–39. https://doi.org/10.1016/j.proeng.2017.04.346

Liu, J.; Yang, F.; Wang, H.; Ouyang, M.; Hao, S. 2013. Effects of pilot fuel quantity on the emissions characteristics of a CNG/diesel dual-fuel engine with optimized pilot injection timing, Applied Energy 110: 201–206. https://doi.org/10.1016/j.apenergy.2013.03.024

Lounici, M. S.; Loubar, K.; Tarabet, L.; Balistrou, M.; Niculescu, D.-C.; Tazerout, M. 2014. Towards improvement of natural gas-diesel dual-fuel mode: An experimental investigation on performance and exhaust emissions, Energy 64: 200–211. https://doi.org/10.1016/j.energy.2013.10.091

Namasivayam, A. M.; Korakianitis, T.; Crookes, R. J.; Bob-Manuel, K. D. H.; Olsen, J. 2010. Biodiesel, emulsified biodiesel and dimethyl ether as pilot fuels for natural gas fuelled engines, Applied Energy 87(3): 769–778. https://doi.org/10.1016/j.apenergy.2009.09.014

Nwafor, O. M. I. 2007. Effect of advanced injection timing on emission characteristics of diesel engine running on natural gas, Renewable Energy 32(14): 2361–2368. https://doi.org/10.1016/j.renene.2006.12.006

Papagiannakis, R. G., Hountalas, D. T. 2003. Experimental investigation concerning the effect of natural gas percentage on performance and emissions of a DI dual-fuel diesel engine, Applied Thermal Engineering 23(3): 353–365. https://doi.org/10.1016/S1359-4311(02)00187-4

Ryu, K. 2013. Effects of pilot injection pressure on the combustion and emissions characteristics in a diesel engine using biodiesel–CNG dual-fuel, Energy Conversion and Management 76: 506–516. https://doi.org/10.1016/j.enconman.2013.07.085

Safronov, A.; Guzeyeva, J.; Begens, J.; Mezulis, A. 2020. The innovative technology of hydraulic compression and boosting for filling the vehicles and storage systems with natural gas and biomethane, Environmental and Climate Technologies 24(3): 80–93. https://doi.org/10.2478/rtuect-2020-0087

Srinivasan, K. K.; Krishnan, S. R.; Qi, Y. 2014. Cyclic combustion variations in dual-fuel partially premixed pilot-ignited natural gas engines, Journal of Energy Resources Technology 136(1): 012003. https://doi.org/10.1115/1.4024855

Srinivasan, K. K.; Krishnan, S. R.; Singh, S.; Midkiff, K. C., Bell, S. R.; Gong, W.; Fiveland, S. B.; Willi, M. 2006. The advanced injection low pilot ignited natural gas engine: a combustion analysis, Journal of Engineering for Gas Turbines and Power 128(1): 213–218. https://doi.org/10.1115/1.1915428

Tarabet, L.; Loubar, K.; Lounici, M. S.; Khiari, K.; Belmrabet, T.; Tazerout, M. 2014. Experimental investigation of DI diesel engine operating with eucalyptus biodiesel/natural gas under dual-fuel mode, Fuel 133: 129–138. https://doi.org/10.1016/j.fuel.2014.05.008

Wei, L.; Geng, P. 2016. A review on natural gas/diesel dual-fuel combustion, emissions and performance, Fuel Processing Technology 142: 264–278. https://doi.org/10.1016/j.fuproc.2015.09.018

Yang, B.; Wei, X.; Xi, C.; Liu, Y.; Zeng, K.; Lai, M.-C. 2014. Experimental study of the effects of natural gas injection timing on the combustion performance and emissions of a turbocharged common rail dual-fuel engine, Energy Conversion and Management 87: 297–304. https://doi.org/10.1016/j.enconman.2014.07.030

Yuvenda, D.; Sudarmanta, B.; Wahjudi, A.; Muraza, O. 2020. Improved combustion performances and lowered emissions of CNG-diesel dual-fuel engine under low load by optimizing CNG injection parameters, Fuel 269: 117202. https://doi.org/10.1016/j.fuel.2020.117202