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References [1] Strumpp, G., Ricco, M. “Common Rail – An Attractive Fuel Injection System for Passenger Car DI Diesel Engines”, SAE Technical Paper Series 960870, 1996. [2] Zellbeck, H. and Schmidt G. “Einspritzsysteme für zukünftige Anforderungen an schnellaufenden Dieselmotor”, MTZ , vol. 56, no. 11, pp. 648-655, 1995. [3] Tutak W, Jamrozik A, Bereczky Á and Lukács K. “Effects of injection timing of diesel fuel on performance and emission of dual fuel diesel engine powered by diesel/E85 fuels”, TRANSPORT (VILNIUS) , vol. 33, no. 3, pp. 633-646, 2018. [4

References [1] Zbierski, K., Układy wtryskowe Common Rail , Wydawnictwo Politechniki Łódzkiej, pp. 18-54, Łódź 2001. [2] Karpiuk, W., Borowczyk, T., Bieliński, M., Problemy eksploatacyjne układów wtryskowych typu common rail , Logistyka – Nauka, Radom 2014. [3] Training materials by CMS Autoelektronika Kędzia. [4] Idzior, M., Problemy doboru wtryskiwaczy silników o zapłonie samoczynnym zasilanych paliwami alternatywnymi , Biblioteka Problemów Eksploatacji, pp. 34-65, Radom 2012. [5] Gunther, H., Układy wtryskowe Common Rail w praktyce warsztatowej , WKiŁ, pp

References [1] Boehner, W., Hummel, K., Common Rail Injection System for Commercial Diesel Vehicles, SAE Technical Paper Series 970345, 1997. [2] Flaig, U., Polach, W., Ziegler, G., Common Rail System (CR-System) for Passenger Car DI Diesel Engines; Experiences with Applications for Series Production Projects , SAE Technical Paper Series 1999-01-0191, 1999. [3] Strumpp, G., Ricco, M. Common Rail – An Attractive Fuel Injection System for Passenger Car DI Diesel Engines, SAE Technical Paper Series 960870, 1996. [4] Zellbeck, H., Schmidt G., Einspritzsysteme

., Environmental Pollution Caused by a Direct Injection Engine, Journal of KONES, Vol. 22, Issue 4, DOI: 10.5604/12314005.1168461, pp. 133-138, 2015. [5] Jankowski, A., Sandel, A., Influence of Fuel Quality on Mixture Preparation and Exhaust Emissions from Diesel Engines with Common Rail System, Journal of KONES. Internal Combustion Engines, Vol. 10, Issue. 3-4, 2003. [6] Seebode, J., Dieselmotorische Einsptitzratenformung unter dem Einfluss von Druckmodulation und Nadelsitzdrosselung , PhD thesis, Institute of Technical Combustion, University of Hanover, Germany 2004. [7

References 1. Kneba, K., Makowski, S., Engine fuel supply and control (in Polish), Wydawnictwa Komunikacji i Łączności, s. 308, Wydanie 1, Warszawa 2004. 2. Badami, M., Mallamo, F., Millo, F., Rossi E.E., Experimental investigation on the effect of multiple injection strategies on emissions, noise and brake specific fuel consumption of an automotive direct injection common-rail diesel engine, International Journal of Engine Research, Volume 4, Number 4, 1 December 2003. 3. Benajes, J., Molina, S. and Garcia, J. M., Influence of pre- and post-injection on the

, H. H., Kalam, M. A., Teoh, Y. H., An investigation of the engine performance, emissions and combustion characteristics of coconut biodiesel in a high-pressure common-rail diesel engine , Energy, Vol. 69, pp. 749-759, 2014. [8] Mofijur, M., Atabani, A. E., Masjuki, H. H., Kalam, M. A., Masum, B. M., A study on the effects of promising edible and non-edible biodiesel feedstocks on engine performance and emissions production: A comparative evaluation , Renewable and Sustainable Energy Reviews, Vol. 23, pp. 391-404, 2013. [9] Prasad, C. V., Krishna, M. M., Reddy, C

References [1] Ambrozik, A., Ambrozik, T., Łagowski, P., Fuel impact on emissions of Harmful components of the exhaust gas from the CI engine during cold start-up , Maintenance and Reliability, Vol. 17, No 1, pp. 95-99, 2015. [2] Bosch, Informator techniczny: Zasobnikowe układy wtryskowe Common Rail , Wydanie 2009. [3] Idzior, M., Borowczyk, T., Karpiuk, W., Stobnicki, P., Możliwości badania stanu technicznego nowoczesnych wtryskiwaczy silników o zapłonie samoczynnym , Logistyka, No. 3, pp. 933-942, 2011. [4] Knefel, T., Technical assessment of Common Rail

-01-17, 2007. [26] Szwaja, S., Grab-Rogalinski, K., Hydrogen combustion in a compression ignition diesel engine , International Journal of Hydrogen Energy, Vol. 34, pp. 4413-4421, 2009. [27] No, S.-Y., Application of hydrotreated vegetable oil from triglyceride based biomass to CI engines – A review , Fuel, Vol. 115, pp. 88-96, 2014. [28] Chen, P. C., Wang, W. C., Roberts, W. L., Fang, T., Spray and atomization of diesel fuel and its alternatives from a single-hole injector using a common rail fuel injection system , Fuel, Vol. 103, pp. 850-861, 2013. [29] Heywood, J. B

References [1] Bo, Y., Xing, W., Chengxun, X., Yifu, L., Ke, Z., Ming-Chia, L., 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, Vol. 87, 2014. [2] Garbala, K., Piekarski, W., Andrzejewska, S., Witaszek, K. Analysis of operating parameters and indicators of a compression ignition engine fuelled with LPG , Scientific Journal of Silesian University of Technology, Series Transport., Vol. 93, pp. 13-22. 2016. [3] Pawlak, G

Abstract

The paper presents analysis of the processes taking place in fuel systems which lead to damage of injection devices in farm machines. The most frequent reasons of failure of traditional injection systems and Common Rail high pressure systems which are caused inter alia by an improper quality of diesel oil were described and discussed. Microscopic tests of the surface of worn plungers of the plunger and barrel assemby of Motorpal injection pumps used in Zetor tractors were carried out. Types of damage to elements of the injection pump and electromagnetic injectors used in Common Rail systems CP4 type based on the tests on the group of 126 on-site repairs were assessed. Repairs were made in the repair centres in Podkarpackie Voivodeship and centres dealing with repair of injection systems. Metallographic tests were carried out in the Laboratory of Materials of Rzeszow University of Technology with the use of electrone scanning microscope Hitachi S-3400N.