This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Spatial-Temporal Characterization of Alternative Fuel Sprays from a Second-Generation Common-Rail Fuel Injection System for Euro4 Passenger Car Application
Technical Paper
2009-01-1856
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
GM Powertrain Europe and Istituto Motori CNR have undergone a research project aimed at studying the effects on engine performance, emissions and fuel consumption of alternative diesel fuels, from both first (FAME) and second (GTL) generation. The present paper reports some of the results achieved studying the impact on injection and spray behavior of rapeseed and soybean methyl-esters, as well as of GTL diesel blends. The test were performed on a Bosch second generation common rail solenoid-driven fuel injection system capable of 1600bar maximum injection pressure, fitted on GM 1.9L Euro4 diesel engine for passenger cars.
The characterization of the injection process has been carried out in terms both of fuel injection rate, as well as of spatial and temporal fuel distribution in a quiescent non-evaporative optically accessible chamber.
The injection schedules that have been analyzed, as well as the gas density in the spray bomb, have been chosen as representative of different engine working conditions for data correlation, both at partial and full load.
Digital processing of the spray images, captured at different instant from the start of injection and for the diverse operating conditions, enabled the spatial and temporal characterization of the fuel in terms of tip penetration and spray-cone angle.
Experimental results support the consideration that, at ambient temperature, alternative fuels induce small variations in the injection pattern, in particular the pilot event which is mostly impacted by variations in fuel viscosity and density that affect the needle dynamics. Also spray pattern exhibit very similar behaviour among the different fuels, with deviations over the standard dispersion that are noticeable at low injected quantities. As a consequence, the variations in performance and emissions that were measured on the multi-cylinder engine with the same fuels can be primarily traced back to the chemical composition of the fuel itself and to the drift in engine working point it triggers in torque-based diesel engine controllers.
Recommended Content
Authors
Topic
Citation
Allocca, L., Montanaro, A., Cipolla, G., and Vassallo, A., "Spatial-Temporal Characterization of Alternative Fuel Sprays from a Second-Generation Common-Rail Fuel Injection System for Euro4 Passenger Car Application," SAE Technical Paper 2009-01-1856, 2009, https://doi.org/10.4271/2009-01-1856.Also In
References
- Johnston, M. Holloway, T. “A Global Comparison of National Biodiesel Production Potentials” University of Wisconsin - Madison 2006
- VV. AA. “Biofuels Progress Report” Commission of the European Communities Bruxelles 2007
- VV. AA. “Biofuels for transport - An international perspective” IEA 2007
- Sheehan, J. Camobreco, V. Duffield, J. Graboski, M. Shapouri, H. “An Overview of Biodiesel and Petroleum Diesel Life Cycles” NREL 1998
- McCormick, R. L. Alleman, T. L. “Impact of Biodiesel Fuel on Pollutant Emissions from Diesel Engines” National Renewable Energy Lab. 2005
- Sze, C. Whinihan, J. K. Olson, B. A. Schenk, C. R. Sobotowski, R. A. “Impact of Test Cycle and Biodiesel Concentration on Emissions” SAE Paper 2007-01-4040 2007
- Kawano, D. et al. “Application of Biodiesel Fuel to Modern Diesel Engine” SAE paper 2006-01-0233 2006
- Pischinger, S. et al. “New Challenges for Combustion Control in Advanced Diesel Engines” MTZ 04/2008 69 2008
- Beatrice, C. Di Iorio, S. Guido, C. Mancaruso, E. Vaglieco, B.M. Vassallo, A. “The Influence of Alternative Diesel Fuels on the Combustion and Emissions of a Euro4 Automotive Diesel Engine” SAE Paper offer 09ICE-0187 2009
- Bosch, W. SAE Paper 660794 1966
- Alfuso, S. Allocca, L. Caputo, G. Corcione, F.E. Montanaro, A. Valentino, G. “Experimental Investigation of a Spray from a Multi-jet Common Rail Injection System for Small Engines” SAE Paper SAE_NA 2005-24-90 2005
- Allocca, L. Corcione, F.E. Costa, M. “Numerical and Experimental Analysis of Multiple Injection Diesel Sprays” SAE Paper 2004-01-1879 2004