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Experimental Investigation on the Potentiality of a GDI System Applied to a Two-Stroke Engine: Analysis on Pollutant Emission and Fuel Consumption Reduction
Technical Paper
2018-32-0047
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The small two-stroke engine represents a strategic typology of propulsion system for applications in which lightweight and high power density are required. However, the conventional two-stroke engine will not be compliant with forthcoming legislations about pollutant emissions and new solutions, such as electrification, are seriously taken into account by industry to overcome the two-stroke engine drawbacks. In this scenario, a promising way to allow the two-stroke engine to be competitive is represented by the use of direct injection systems, in order to overcome the long-standing issue of short circuiting fuel. The authors in previous studies developed a low-pressure direct injection (LPDI) system for a 300 cm3 two-stroke engine that was ensuring the same power output of the engine in carbureted configuration and raw pollutant emissions consistent with a four-stroke engine of similar performance. The main drawbacks of the system were the large time required for delivering the fuel and the incomplete vaporization in some working conditions; as a result, the engine operation was limited at high revolution speed, as well as the cycle to cycle variation was amplified at very low loads.
In this study, the LPDI system was replaced by a GDI system, with a single high pressure injector installed in the engine head capable of working up to an operating pressure of 150 bar. After a preliminary numerical activity to identify the best injector configuration, the system performance was evaluated at the test bench. The experiments show that the GDI system allows reaching higher revolution speeds, thanks to the shorter injection duration, with the same benefits in terms of fuel consumption reduction obtained with the LPDI technology. In-depth investigations on the injection timing and the injection pressure were carried out in order to minimize both hydrocarbon emissions and brake specific fuel consumption.
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Authors
- Luca Romani - Università degli Studi di Firenze
- Francesco Balduzzi - Università degli Studi di Firenze
- Giovanni Ferrara - Università degli Studi di Firenze
- Lorenzo Bosi - Università degli Studi di Firenze
- Rita Di Gioia - Magneti Marelli Powertrain SPA
- Giovanni Bonandrini - Magneti Marelli Powertrain SPA
- Jacopo Fiaschi - Betamotor SpA
- Federico Tozzi - Betamotor SpA
Citation
Romani, L., Balduzzi, F., Ferrara, G., Bosi, L. et al., "Experimental Investigation on the Potentiality of a GDI System Applied to a Two-Stroke Engine: Analysis on Pollutant Emission and Fuel Consumption Reduction," SAE Technical Paper 2018-32-0047, 2018, https://doi.org/10.4271/2018-32-0047.Data Sets - Support Documents
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References
- Gebrehiwot , M. and Van den Bossche , A. Electric Vehicle Possibilities Using Low Power and Light Weight Range Extenders Proc. of European Electric Vehicle Congress Brussels, Belgium Dec. 3-5 2014
- Ragg , P.W. , McKay , M.L. , and Brooks , R.S. 1986
- Nesti , P. 2002
- Ambler , M. and Zocchi , A. Development of the Aprilia DI-Tech 50 SAE Technical Paper 2001-01-1781 2001 10.4271/2001-01-1781
- Duret , P. , Lavy , J. , Venturi , S. , and Allen , C. SCIP Simplified Direct Injection for Low Emissions Small Two-Stroke Engines SAE Technical Paper 1999-01-3289 1999 10.4271/1999-01-3289
- Winkler , F. , Oswald , R. , Schögl , O. , Abis , A. et al. Layout and Development of a 300 cm 3 High Performance 2S-LPDI Engine SAE Technical Paper 2015-32-0832 2015
- Balduzzi , F. , Vichi , G. , Romani , L. , and Ferrara , G. Development of a Low Pressure Direct Injection System for a Small 2S Engine. Part I - CFD Analysis of the Injection Process SAE Int. J. Engines 8 4 2015 10.4271/2015-01-1727
- Romani , L. , Vichi , G. , Ferrara , G. , Balduzzi , F. et al. Development of a Low Pressure Direct Injection System for a Small 2S Engine. Part II - Experimental Analysis of the Engine Performance and Pollutant Emissions SAE Technical Paper 2015-01-1730 2015 10.4271/2015-01-1730
- Balduzzi , F. , Vichi , G. , Romani , L. , and Ferrara , G. CFD Analysis of the Effect of the Injection Pressure on a Small 2S LPDI Engine SAE Technical Paper 2015-32-0760 2015
- Romani , L. , Vichi , G. , Balduzzi , F. , Bianchini , A. , et al. Fine-Tuning of a Two Stoke Engine in Full Power Configuration Provided with a Low Pressure Direct Injection System Energy Procedia 126 987 994 2017 10.1016/j.egypro.2017.08.251
- Jajcevic , D. , Almbauer , R. , Schmidt , S. , Glinsner , K. et al. CFD Study of Spray Design for a GDI High Performance 2-Stroke Engine SAE Technical Paper 2010-32-0014 2010 10.4271/2010-32-0014
- Winkler , F. , Oswald , R. , Schoegl , O. , and Foxhall , N. Characterization of Different Injection Technologies for High Performance Two-Stroke Engines SAE Technical Paper 2016-32-0001 2016 10.4271/2016-32-0001
- Borghi , M. , Mattarelli , E. , Muscoloni , J. , Rinaldini , C.A. et al. Design and Experimental Development of a Compact and Efficient Range Extender Engine Applied Energy 202 507 526 2017 10.1016/j.apenergy.2017.05.126
- Wang , X. , Ma , J. , and Zhao , H. Analysis of Mixture Formation Process in a Two-Stroke Boosted Uniflow Scavenged Direct Injection Gasoline Engine International Journal of Engine Research 2017 10.1177/1468087417736451
- Balduzzi , F. , Romani , L. , Tanganelli , A. , Bigalli , S. , et al. SAE Small Engine Technology Conference & Exhibition 2018
- Romani , L. , Lenzi , G. , Ferrari , L. , and Ferrara , G. Indirect Estimation of In-Cylinder Pressure through the Stress Analysis of an Engine Stud SAE Technical Paper 2016-01-0814 2016 10.4271/2016-01-0814
- Romani , L. , Vichi , G. , Balduzzi , F. , and Ferrara , G. An Experimental Methodology for the Evaluation of the Trapped Air-Fuel Ratio of a Small 2S LPDI Engine SAE Small Engine Technologies Conference & Exhibition 2015
- Spindt , R.S. Air/Fuel Ratios from Exhaust Gas Analysis SAE Technical Paper 650507 74 1965 10.4271/650507
- Blair , G. and Kenny , R. Further Developments in Scavenging Analysis for Two-Cycle Engines SAE Technical Paper 800038 1980
- Olsen D. B. 1999
- Heywood , J.B. The Two-Stroke Cycle Engine SAE International 1999