Detailed Model of a Common Rail Injector

  • 1 Department of Automotive Technologies, Faculty of Transportation Engineering and Vehicle Engineering, Budapest
  • 2 Department of Automotive Technologies, Faculty of Transportation Engineering and Vehicle Engineering, Budapest


This work is about the validation of a Common Rail (CR) injector model. The model describes injector internal behavior in a detailed way, validation is done using dosage measurements and needle lift traces.

The model contains fluid dynamic, mechanic and electro-magnetic parts describing all important internal processes. To compare the modelling results against measurement data, three test cases were chosen on a medium duty test engine to represent a wide range of operation points. Dosage measurements were done by averaging the injected mass of 1500 injections, each measurement repeated three times. Needle displacement was measured using an injector equipped with a needle lift sensor in the same operating points. The results of the simulated injector and the measured values showed good conformity both in needle displacement and injected fuel mass, so the model can be a basis for further injector and combustion analyses.

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  • [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] Farkas, O., Szabados, G., Antal, Á. and Török, Á. “Experimental Investigation of Discoloration Generated by a CI ICE’s Exhaust Gas on Various Stone Types”, Periodica Polytechnica Transportation Engineering, vol. 46, no. 3, pp. 158-163. doi:, 2018.

  • [5] Sabau, A., Barhalescu, M. and Oanta, E. “Modeling of high pressure fuel injection systems”, Annals of DAAAM for 2012 & Proceedings of the 23rd International DAAAM Symposium, vol. 23, no.1, 2011.

  • [6] Chiavola, O., Giulanelli, P. “Modeling and Simulation of Common rail Systems”, SAE 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 behavior from multiple injections common rail systems”, SAE Technical Paper Series, 2002-01-2777, 2002.

  • [10] Catalano, L. A., Tondolo, V. A. and Dadone, A. “Dynamic rise of pressure in the common rail fuel injection system”, SAE Technical Paper Series, 2002-01-0210, 2002.

  • [11] Digesu, P., Ficarella, A., Laforgia, D., Bruni, G. and Ricco, M. “Diesel Electro-Injector: A Numerical Simulation Code”, SAE Technical Paper Series, 940193, 1994.

  • [12] Mulemane, A., Han, J-S., Lu P-H., Yoon, S-J. and Lai, M-Ch. “Modeling Dynamic Behavior of Diesel Fuel Injection Systems”, SAE Technical Paper Series, 2004-01-0536, 2004.

  • [13] Payri, R., Climent, H., Salvador, F. J. and Favennec, A. G. “Diesel injection system modelling. methodology and application for a first-generation common rail system”, Proceedings of the Institution of Mechanical Engineering, vol. 218, part D, 2004.

  • [14] Bianchi, G. M., Pelloni, P., Corcione, E. and Luppino, F. “Numerical analysis of passenger car HSDI diesel engines with the 2nd generation of common rail injection systems: The effect of multiple injections on emissions”, SAE Technical Paper Series, 2001-01-1068, 2001.

  • [15] Bianchi, G. M., Falfari, S., Pelloni P., Filicori, F. and Milani, M. “A Numerical and Experimental Study on the Possible Improvements of C.R. Injectors”, SAE Technical Paper Series, 2002-01-0500, 2002.

  • [16] Bianchi, G. M., Falfari, S., Pelloni P., Kong, S-C. and Reitz, R.D. “Numerical Analysis of High Pressure Fast-Response C.R. Injector Dynamics”, SAE Technical Paper Series, 2002-01-0213, 2002.

  • [17] Bianchi, G. M., Falfari, S., Parotto, M. and Osbat, G. “Advanced Modeling of Common Rail Injector Dinamics and Comparison with Experiments, SAE Technical Paper Series, 2003-01-0006, 2003.

  • [18] Amiola, V., Ficarella, A., Laforgia, D., De Matthaeis, S. and Genco, C. “A theoretical code to simulate the behavior of an electro-injector for diesel engines and parametric analysis”, SAE Technical Paper Series, 970349, 1997.

  • [19] Ficarella, A., Laforgia, D. and Landriscina, V. “Evaluation of instability phenomena in a common rail injection system for high speed diesel engines”, SAE Technical Paper Series, 1999-01-0192, 1999.

  • [20] Dongiovanni, C., Coppo, M. “Accurate Modelling of an Injector for Common Rail Systems”, Fuel Injection, InTech, ISBN: 978-953-307-116-9, 2010.

  • [21] von Kunsberg Sarre, C., Kong, S-C. and Reitz, R. D. “Modeling the Effects of Injector Nozzle Geometry on Diesel Sprays”, SAE Technical Paper Series, 1999-01-0912, 1999.

  • [22] Vass, S., Németh, H. “Sensitivity analysis of instantaneous fuel injection rate determination for detailed Diesel combustion models”, periodica polytechnica, Transportation Engineering, vol. 41, no. 1, pp. 77-85, 2013.

  • [23] Vass S., Zöldy M. “Detailed modeling of the internal processes of an injector for Common Rail Systems”, Journal of KONES Powertrain and Transport, vol. 25, no. 2, pp. 415-426, 2018.

  • [24] Kolade, B., Boghosian, M. E., Reddy, P.S. and Gallagher, S. “Development of a General Purpose Thermal- Hydraulic Software and its Application to Fuel Injection Systems”, SAE Technical Paper Series, 2003-01-0702, 2003.

  • [25] Vass S., Németh H. “Detailed electromagnetic model of a Common Rail injector”, 34th International Colloquium on Advenced Manufacturing and Repairing Technologies in Vehicle Industry, Visegrád, Hungary, ISBN 978-963-313-258-6, pp. 165-168., May 2017.

  • [26] Bárdos, Á., Vass, S., Németh, H. “Validation of a detailed commercial vehicle turbocharged diesel engine model”, A Jövő Járműve, vol. 2014, no. 1-2, pp. 25-31, 2014.


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