This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Medium Pressure Injection System for Small Diesel Engine Application: Numerical Simulation and Experimental Results
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 11, 2014 by SAE International in United States
Annotation ability available
Diesel engine technology is continuously focused on higher performances and lower emission levels. Reduced costs and lower fuel consumption are key factors in engine development too, in particular for small diesel engine, both for on-road and non-road application.
In order to fulfill emission legislation requirements, improve engine performance and reduce fuel consumption, nowadays the common rail injection system with electronic actuation is widely used in diesel engines. Nevertheless, conventional common rail system cost is quite high, mainly due to the complex indirect actuation of the injector, and the injector backflow leads to inefficiencies in the injection system.
In this work an analysis of a medium pressure injection system for small diesel engines is presented, focusing on the achievable engine performances and emissions. The new injection system makes use of an innovative solenoid directly actuated injector (DDI) with a lower maximum rail pressure in respect with conventional common rail systems. A feasibility analysis of such a system for a light commercial vehicle (LCV) application is reported.
Experimental tests on the new DDI injector have been carried out and its performances are evaluated and compared with a conventional system in terms of both hydraulic and spray behavior.
In order to define the proper characteristics of the injection system, numerical analyses of the components have been performed, also considering in-cylinder CFD simulations of mixture formation and combustion.
Then the considered injection system was tested on engine test bench. The results of experimental tests confirm the effectiveness of the new injection system in terms of performance, emission and above all engine fuel consumption.
CitationBonandrini, G., Di Gioia, R., Venturoli, L., Papaleo, D. et al., "Medium Pressure Injection System for Small Diesel Engine Application: Numerical Simulation and Experimental Results," SAE Technical Paper 2014-32-0134, 2014, https://doi.org/10.4271/2014-32-0134.
- Johnson , T. Vehicular Emissions in Review SAE Int. J. Engines 7 3 1207 1227 2014 10.4271/2014-01-1491
- Postrioti , L. , Malaguti , S. , Bosi , M. , Buitoni , G. , Piccinini , S. , Bagli , G. Experimental and numerical characterization of a direct solenoid actuation injector for Diesel engine applications 2014 Fuel 118 316 328
- Postrioti , L. , Buitoni , G. , Pesce , F.C. , Ciaravino , C. Zeuch method-based injection rate analysis of a common-rail system operated with advanced injection strategies 2014 Fuel 128 188 198
- Postrioti , L. , Grimaldi , C. , Ceccobello , M. , and Di Gioia , R. Diesel Common Rail Injection System Behavior with Different Fuels SAE Technical Paper 2004-01-0029 2004 10.4271/2004-01-0029
- OpenFOAM http://www.openfoam.org ESI Group 2014
- D'Errico , G. , Lucchini , T. , Di Gioia , R. , and Bonandrini , G. Application of the CTC Model to Predict Combustion and Pollutant Emissions in a Common-Rail Diesel Engine Operating with Multiple Injections and High EGR SAE Technical Paper 2012-01-0154 2012 10.4271/2012-01-0154