Abstract: The article presents the heat release characteristics determined on the basis of the actual indicator charts of the FIAT MultiJet 1.3 SDE 90 KM engine powered by diesel oil and working at full load conditions. The parameters of these characteristics are: the starting of the combustion process, the duration of the combustion process, the average compression politropy exponent, the maximum relative amount of combustion heat release and the angle of its occurrence, the heat loss caused by incomplete combustion, the maximum rate of the relative amount of combustion heat release and the angle of its occurrence. The research was conducted on the dynamometic stand equipped with control and measurement system, sensors for measuring the pressure course in the cylinder and the pressure in the injection pipe and the system to measure the current steering the injector work. The article presents also the rate of the relative amount of combustion feat release. These rates were described using one, two or three functions of Wiebe.
B I B L I O G R A F I A1. Ambrozik A., Łagowski P.: Methodology of numerical simulation for indicator diagrams in self-ignition engine, Czasopismo Techniczne Mechanika Nr 6, wyd. Politechniki Krakowskiej, s. 61-69, 2004.
2. Ambrozik A., Ambrozik T., Łagowski P.: The comparison of the working cycles of petrol fuelled and hydrogen fuelled internal combustion engine, Journal of KONES Powertrain and Transport, Vol. 13, No. 3, s.9-19, 2006.
3. Ambrozik A., Ambrozik T., Orliński P., Orliński S.: Wpływ zasilania silnika Perkins 1104C bioetanolem na ekonomiczne i energetyczne wskaźniki jego pracy, czasopismo Logistyka 3/2011, s. 29-36. ISBN 978-83-7351-443-0, 2011.
4. Ambrozik A.: Analiza cykli pracy czterosuwowych silników spalinowych, wyd. Politechnika Świętokrzyska, Kielce 2010.
5. Ambrozik T., Kosno M.: The effect of exhaust gas recirculation on the process of combustion in the self-ignition engine, Journal of KONES Powertrain and Transport 2014.
6. Ambrozik T.: Internal combustion engine, wyd. Politechnika Świętokrzyska, on-line: http://wmibm-moodle.tu.kielce.pl, Kielce, 2013.
7. Ambrozik T.: Wpływ recyrkulacji spalin na stężenia spalin w silniku FIAT MultiJet 1.3, czasopismo Logistyka 4/2014.
8. Brzozowski K., Nowakowski J.: Model do wyznaczania parametrów pracy silnika o zapłonie samoczynnym, Eksploatacja i Niezawodność - Maintenance and Reliability, Vol. 16, No. 3, 2014
9. Galindo J., Climent H., Plá B., Jiménez V.D.: Correlations for Wiebe function parameters for combustion simulation in two-stroke small engines, Applied Thermal Engineering 31 (2011) 1190-1199, 2011.
10. Heywood J.B.: Internal Combustion Engine Fundamentals. McGraw–Hill Book Company, 1998.
11. Hunicz J., Gęca M.: Experimental and modeling study of the gasoline HCCI engine with internal gas recirculation, s. 3-9, Silniki spalinowe 1/2013 (152), 2013.
12. Jaśkiewicz M., Jurecki R., Karendał M., Pieniążek W., Stańczyk T.: Badania reakcji kierowców na pojazd wyjeżdżający z prawej strony, realizowane na torze samochodowym, Zeszyty Naukowe Instytutu Pojazdów
2010, Nr 1(77), s. 307-319, 2010.
13. Jaśkiewicz M., Jurecki R., Zuska A.: Przyczyny wypadków drogowych w Polsce i w Niemczech w latach 2000 – 2012, czasopismo Autobusy, Technika, Eksploatacja, Systemy Transportowe, 5/2014.
14. Klein M., Eriksson L.: A specific heat ratio model for single-zone heat release models, 2004
SAE 2004-01-1464, 2004.
15. Kruczyński S., Orliński P.: Combustion of methyl esters of various origins in the agricultural engine, Indian Journal of Engineering & Materials Sciences Vol. 20, pp. 483-491, 2013.
16. Sendyka B., Mitianiec W., Noga M.: Simulation of work of an engine working with combustion initiation from ignition dose of fuel, Journal of KONES Powertrain and Transport, Vol. 18, No. 3 2011, s.395-403, 2011.
17. Yasar H., Soyhan H.S., Walmsley H., Head B., Sorusbay C.: Double-Wiebe function: An approach for single-zone HCCI engine modeling, Applied Thermal Engineering 28 (2008) 1284–1290, 2008. 
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