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injectors on the ground of overflow bench tests , Eksploatacja i Niezawodnosc – Maintenance and Reliability, Vol. 14 (1), pp. 42-53, 2012. [5] Osipowicz, T., Diagnosis Diesel Common Rail fuel system , Autobusy, Technika, Eksploatacja, Systemy Transportowe, No. 8, pp. 129-131, 2016. [6] Osipowicz, T., Diagnosing Common Rail Fuel Injectors Using Fuel Micro-Doses , TEKA. Commission of Motorization and Energetics in Agriculture – 2015, Vol. 15, No. 1, pp. 61-64. [7] Osipowicz, T., Testing of Modern Fuel Injections Pumps , TEKA. Commission of Motorization and Energetics in

Technical Paper Series , 2001-01-3183, 2001. [7] Lino, P., Maione, B. and Rizzo, A. “Nonlinear modelling and control of a common rail injection system for diesel engines”, Applied Mathematical Modeling , vol. 31, pp. 1770-1784, 2007. [8] Palamondon, E., Seers, P., “Development of a simplified dynamic model for a piezoelectric injector using multiple injection strategies with biodiesel / diesel-fuel blends”, Applied Energy , no. 131, pp. 411-424, 2014. [9] Brusca, S., Giuffrida, A., Lanzafame, R. and Corcione, G. E. “Theoretical and experimental analysis of diesel sprays

References Trela M., Kwidziński R., Butrymowicz D.: Experimental investigation of steam injector in respect to heat and momentum transfer (in Polish). IFFM Internal Report No 7732/07, Gdańsk 2007. Trela M., Kwidziński R.: Exergy analysis of steam-water injector performance. Archives of Thermodynamics, Vol. 29, No 1, 2008. Trela M., Butrymowicz D., Dumaz P.: Experimental investigations of heat transfer in steam-water injector. 5th Int. Conference on Multiphase Flow (ICMF'04), Yokohama, Japan, 2004, CD-ROM, Paper No. 544. Dumaz P., Duc B.: The DIVA program: Some

REFERENCES Baran, I., Nowak, M., Schmidt, J. and Ono, K. (2007). Potentials of AE application in testing industrial pipelines. Advances in Acoustic Emission, USA, 2007. Bejger, A. and Drzewieniecki, J. (2015). Analysis of tribological processes occuring in precision pairs based on example of fuel injection pumps of marine diesel engines. Scientific Journals of the Maritime University of Szczecin, 41 (113), pp. 9-16. Dudzik, K. and Charchalis, A. (2015). The use of acoustic emission for the diagnosis of 3Al25/30 engine fuel injector. Logistyka, 3(2015), pp. 1077

gasliquid interface. AIAA Journal, 29,1589-1595. Lefevbre, A.W., 1989. Atomization and Sprays. Hemisphere Publishing Corp., New York. Bazarov, V.G. and Lul’ka, L.A., 1978. Self-pulsation of liquid flow in coaxial air stream. Soviet Aeronautics, vol. 3, Pergamon, New York, pp. 14-18. Bazarov, V.G., 1995. Self-pulsation in coaxial injectors with central swirl liquid stage. AIAA 1995-2358, 31st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, San Diego, CA. July 10-12, 1995. Bazarov, V.G. and Yang, V., 1998. Liquid-propellant rocket engine injector dynamics, J

JUN 2010 p. 55-62 Bukurov M. and Bikic S. and Prica M (2012): The Efficiency Rate of a Steam-Water Injector, Acta Polytechnica Hungarica Vol. 9, No. 5 2012 p. 107-126 Drożyński Z., and Konorski A.(1980): Algorytm wyznaczania parametrów termodynamicznych urządzeń eżektorowych, Instytut Maszyn Przepływowych PAN Gdańsk 2018 Goliński A. and Troskolański T.(1979): Strumienice Teoria i Konstrukcja, Wydawnictwo Naukowo-Techniczne Warszawa 1979 Grzesiak S. (2018): ALTERNATIVE PROPULSION PLANTS FOR MODERN LNG CARRIERS, New Trends in Production Engineering – Volume 1, issue 1

modelling and control of a common rail injection system for diesel engines, Applied Mathematical Modelling 31: 1770-1784., 2007. [9] Palamondon, E., Seers, P., Development of a simplified dynamic model for a piezoelectric injector using multiple injection strategies with biodiesel / diesel-fuel blends, Applied Energy 131: 411-424, 2014. [10] Brusca, S., Giuffrida, A., Lanzafame, R., Corcione, G. E., Theoretical and experimental analysis of diesel sprays behaviour from multiple injections common rail systems, SAE Technical Paper Series 2002-01-2777, 2002. [11

, P. and Petrov, V. (2013). TRIZ Innovation and Inventive Problem Solving Handbook. Berlin: TriS Europe - Innovation Knowledge Company. Marine study (2017). Fuel injector of diesel engines. [online] Available at: http://marinestudy.net/fuelinjector- of-diesel-engines/ [Accessed 14 Jun 2017]. Mayer, O. (2017). Flexible lighting distribution on “party ships”. Scientific Journals of the Maritime niversity of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie, 49(121), pp. 9-16, doi: 10.17402/195. Piesowicz, E. et al. (2016). Poly(butylene terephthalate

Abstract

The presented paper shows the results of the laboratory study on the relation between chosen malfunctions of a fuel injector and composition of exhaust gas from the marine engine. The object of research is a marine 3-cylinder, four-stroke, direct injection diesel engine with an intercooler system. The engine was loaded with a generator and supercharged. The generator was electrically connected to the water resistance. The engine operated with a load between 50 kW and 250 kW at a constant speed. The engine load and speed, parameters of the turbocharger, systems of cooling, fuelling, lubricating and air exchange, were measured. Fuel injection and combustion pressures in all cylinders of the engine were also recorded. Exhaust gas composition was recorded by using a electrochemical gas analyzer. Air pressure, temperature and humidity were also recorded. Emission characteristics of the engine were calculated according to ISO 8178 standard regulations. During the study the engine operated at the technical condition recognized as „working properly” and with simulated fuel injector malfunctions. Simulation of malfunctions consisted in the increasing and decreasing of fuel injector static opening pressure, decalibration of fuel injector holes and clogging 2 neighboring of 9 fuel injector holes on one of 3 engine cylinders.

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