This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Digital Shaping and Optimization of Fuel Injection Pattern for a Common Rail Automotive Diesel Engine through Numerical Simulation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 04, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Development trends in modern Common Rail Fuel Injection System (FIS) show dramatically increasing capabilities in terms of optimization of the fuel injection pattern through a constantly increasing number of injection events per engine cycle along with a modulation and shaping of the injection rate. In order to fully exploit the potential of the abovementioned fuel injection pattern optimization, numerical simulation can play a fundamental role by allowing the creation of a kind of a virtual injection rate generator for the assessment of the corresponding engine outputs in terms of combustion characteristics such as burn rate, emission formation and combustion noise (CN). This paper is focused on the analysis of the effects of digitalization of pilot events in the injection pattern on Brake Specific Fuel Consumption (BSFC), CN and emissions for a EURO 6 passenger car 4-cylinder diesel engine. The numerical evaluation was performed considering steady-state conditions for 3 key points representative of typical operating conditions in the low-medium load range. The optimization process was carried out through numerical simulation, by means of a suitable target function aiming to minimize BSFC and CN while not exceeding the target NOx emissions level. By means of a previously developed fuel injection system model, possible different injection patterns with high number of pilot injections were evaluated thus obtaining a kind of virtual injection rate generator, the outcomes of which were then used as input for a DIPulse combustion model in order to predict BSFC, combustion noise and emissions. Through numerical optimization of pilot injection pattern digitalization, potential for achieving significant reductions in BSFC and CN for low load engine points while not exceeding the target NOx emissions level, was demonstrated.
CitationSapio, F., Piano, A., Millo, F., and Pesce, F., "Digital Shaping and Optimization of Fuel Injection Pattern for a Common Rail Automotive Diesel Engine through Numerical Simulation," SAE Technical Paper 2017-24-0025, 2017, https://doi.org/10.4271/2017-24-0025.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
|[Unnamed Dataset 4]|
- Bosch, R., “Automotive Handbook,” Robert Bosch GmbH Postfach(Plochngen): Germany, 2004.
- Lakshminarayanan, P. and Aghav, Y.V., “Modelling Diesel Combustion,” Mech. Eng. Ser. (1980):59-78, 2010, doi:10.1007/978-90-481-3885-2.
- Heywood, J.B., “Internal Combustion Engine Fundementals,” New York: McGraw-Hill, 1988, doi:10987654.
- Krieger, K., Hummel, H., and Naik, L., "Diesel Fuel Injection Technology - An essential contribution towards an environment friendly powerful diesel engine," SAE Technical Paper 2000-01-1429, 2000, doi:10.4271/2000-01-1429.
- Stiesch, G., “Modelling Engine Spray and Combustion Processes,” Berlin: Springer-Verlag Berlin Heidelberg, 2003, doi:10.1007/978-3-662-08790-9.
- Catania, A.E., Finesso, R., and Spessa, E., “Predictive zero-dimensional combustion model for di diesel engine feed-forward control,” Energy Convers. Manag. 52(10):3159-3175, 2011, doi:10.1016/j.enconman.2011.05.003.
- Arrègle, J., López, J.J., García, J.M., and Fenollosa, C., “Development of a zero-dimensional Diesel combustion model: Part 2: Analysis of the transient initial and final diffusion combustion phases,” Appl. Therm. Eng. 23(11):1319-1331, 2003, doi:10.1016/S1359-4311(03)00080-2.
- Payri, F., Olmeda, P., Martín, J., and García, A., “A complete 0D thermodynamic predictive model for direct injection diesel engines,” Appl. Energy 88(12):4632-4641, 2011, doi:10.1016/j.apenergy.2011.06.005.
- Piano, A., Millo, F., Boccardo, G., Rafigh, M. et al., "Assessment of the Predictive Capabilities of a Combustion Model for a Modern Common Rail Automotive Diesel Engine," SAE Technical Paper 2016-01-0547, 2016, doi:10.4271/2016-01-0547.
- Minami, T., Takeuchi, K., and Shimazaki, N., "Reduction of Diesel Engine NOx Using Pilot Injection," SAE Technical Paper 950611, 1995, doi:10.4271/950611.
- Zhang, L., "A Study of Pilot Injection in a DI Diesel Engine," SAE Technical Paper 1999-01-3493, 1999, doi:10.4271/1999-01-3493.
- Schommers, J., Duvinage, F., Stotz, M., Peters, A. et al., "Potential of Common Rail Injection System for Passenger Car DI Diesel Engines," SAE Technical Paper 2000-01-0944, 2000, doi:10.4271/2000-01-0944.
- Badami, M., Mallamo, F., Millo, F., and Rossi, E., "Influence of Multiple Injection Strategies on Emissions, Combustion Noise and BSFC of a DI Common Rail Diesel Engine," SAE Technical Paper 2002-01-0503, 2002, doi:10.4271/2002-01-0503.
- Mallamo, F., Badami, M., and Millo, F., "Analysis of Multiple Injection Strategies for the Reduction of Emissions, Noise and BSFC of a DI CR Small Displacement Non-Road Diesel Engine," SAE Technical Paper 2002-01-2672, 2002, doi:10.4271/2002-01-2672.
- Piano, A., Millo, F., Postrioti, L., Biscontini, G. et al., "Numerical and Experimental Assessment of a Solenoid Common-Rail Injector Operation with Advanced Injection Strategies," SAE Int. J. Engines 9(1):565-575, 2016, doi:10.4271/2016-01-0563.
- GT-SUITE, “Fuel Injection Applications Manual,” 2017th ed.
- GT-SUITE, “Engine Performance Application Manual,” 2017th ed.
- GT-SUITE, “Optimization Manual,” 2017th ed.
- GT-SUITE, “Acoustic Apllications Manual,” 2017th ed.
- AVL, “Operative Instructions AVL 4500 Combustion Noise Meter,” 1986.
- AVL, “Noise and Vibrations Training Program,” 1986.
- Emery, F. and Nenarokomov, A.V, “Optimal experiment design,” Meas. Sci. Technol. 9:864-876, 1998, doi:10.1088/0957-0233/9/6/003.
- Han, Z., Uludogan, A., Hampson, G., and Reitz, R., "Mechanism of Soot and NOx Emission Reduction Using Multiple-injection in a Diesel Engine," SAE Technical Paper 960633, 1996, doi:10.4271/960633.