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A Comparative Study on the Thermodynamic Analysis and Performance Characteristics of a Dedicated EGR Gasoline Engine Under Various D-lambda
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
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The concept of D-EGR (Dedicated EGR) used high EGR rate and fuel reformation to improve thermal efficiency, entire exhaust gas which supplied from a single cylinder is recirculated to the intake system and then entered into all cylinders to improve combustion. In this study, the D-EGR system is performed on a 1.5 L port fuel injection 4-cylinder gasoline engine, in comparison to the basic engine, the reduction of fuel consumption is about 20~30 g/kWh in most of the D-EGR engine operating range, a maximum 104.1 g/kWh BSFC reduction is found at 14.0bar@1800rpm, the lowest fuel consumption is decreased from 253.7 to 224.3 g/kWh by D-EGR, and the corresponding maximum brake thermal efficiency is improved from 32.6 to 36.9%. D-lambda (the lambda of dedicated cylinder) is considered as the most significant factor to influence the fuel economy and combustion stability, the suitable range of D-lambda is around 0.69~0.82 to gain better engine performance under the whole operating points. D-lambda sweeps are conducted firstly at the lowest fuel consumption point, the fuel economy, combustion characteristics, and emission performance are analyzed. It can be seen that the rise of the degree of constant volume is the dominant contributor to the enhancement of thermal efficiency. The effect of D-lambda is investigated experimentally by first and second law of thermodynamic analysis, the energy and exergy distribution of in-cylinder combustion are calculated and the thermal equilibrium is discussed also. In addition, several typical points are selected to investigate the operating characteristics of the D-EGR engine over its whole operating range.
CitationYu, S., Song, D., MA, X., zhigang, M. et al., "A Comparative Study on the Thermodynamic Analysis and Performance Characteristics of a Dedicated EGR Gasoline Engine Under Various D-lambda," SAE Technical Paper 2018-01-1373, 2018, https://doi.org/10.4271/2018-01-1373.
Data Sets - Support Documents
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- Terrence, F.A.I., Mangold, B.W., Gingrich, J.W., and Mehta, D., EGR system with dedicated EGR cylinders. US, US 8291891 B2 2012.
- Wei, H., Zhu, T., Shu, G. et al. , “Gasoline engine exhaust gas recirculation - A review,” Applied Energy 99(2):534-544, 2012.
- Zheng, M., Reader, G.T., and Hawley, J.G., “Diesel engine exhaust gas recirculation--a review on advanced and novel concepts[J],” Energy Conversion & Management 45(6):883-900, 2004.
- Zhang, C. and Wu, H., “The simulation based on CHEMKIN for homogeneous charge compression ignition combustion with on-board fuel reformation in the chamber[J],” International Journal of Hydrogen Energy 37(5):4467-4475, 2012.
- Tsolakis, A., Megaritis, A., and Yap, D., “Application of exhaust gas fuel reforming in diesel and homogeneous charge compression ignition (HCCI) engines fuelled with biofuels,” Energy 33(3):462-470, 2008.
- Ng, C.K.W. and Thomson, M.J., “Modelling of the effect of fuel reforming and EGR on the acceptable operating range of an ethanol HCCI engine,” International Journal of Vehicle Design 44(44):107-123, 2007.
- Alger, T., Gukelberger, R., and Gingrich, J., “Impact of EGR Quality on the Total Inert Dilution Ratio,” SAE Int. J. Engines 9(2):796-806, 2016, doi:10.4271/2016-01- 0713.
- Alger, T., Gingrich, J., and Mangold, B., “The Effect of Hydrogen Enrichment on EGR Tolerance in Spark Ignited Engines,” SAE Technical Paper 2007-01-0475 , 2007, doi:10.4271/2007-01-0475.
- Alger, T. and Mangold, B., “Dedicated EGR: A New Concept in High Efficiency Engines,” SAE Int. J. Engines 2(1):620-631, 2009, doi:10.4271/2009-01-0694.
- Gukelberger, R., Gingrich, J., Alger, T., Almaraz, S. et al. , “LPL EGR and D-EGR® Engine Concept Comparison Part 1: Part Load Operation,” SAE Int. J. Engines 8(2):570-582, 2015, doi:10.4271/2015-01-0783.
- Gukelberger, R., Gingrich, J., Alger, T., and Almaraz, S., “LPL EGR and D-EGR® Engine Concept Comparison Part 2: High Load Operation,” SAE Int. J. Engines 8(2):547-556, 2015, doi:10.4271/2015-01-0781.
- Gukelberger, R., Robertson, D., Alger, T., Almaraz, S. et al. , “Alternative Fuel Testing on a Port Fuel Injected LPL EGR and D-EGR® Engine,” SAE Technical Paper 2016-01-2170 , 2016, doi:10.4271/2016-01-2170.
- Randolph, E., Gukelberger, R., Alger, T., Briggs, T. et al. , “Methanol Fuel Testing on Port Fuel Injected Internal-Only EGR, HPL-EGR and D-EGR®Engine Configurations,” SAE Int. J. Fuels Lubr. 10(3), 2017.
- Sarlashkar, J., Rengarajan, S., and Roecker, R., “Transient Control of a Dedicated EGR Engine,” SAE Technical Paper 2016-01-0616 , 2016, doi:10.4271/2016-01-0616.
- Chadwell, C., Alger, T., Zuehl, J., and Gukelberger, R., “A Demonstration of Dedicated EGR on a 2.0 L GDI Engine,” SAE Int. J. Engines 7(1):434-447, 2014, doi:10.4271/2014-01-1190.
- Denton, B., Chadwell, C., Gukelberger, R., and Alger, T., “Design and Implementation of a D-EGR® Mixer for Improved Dilution and Reformate Distribution,” SAE Int. J. Engines 10(3):892-897, 2017, doi:10.4271/2017-01-0647.
- Alger, T., Walls, M., Chadwell, C., Joo, S. et al. , “The Interaction between Fuel Anti-Knock Index and Reformation Ratio in an Engine Equipped with Dedicated EGR,” SAE Int. J. Engines 9(2):786-795, 2016, doi:10.4271/2016-01-0712.
- Lee, S., Iida, N., and Sako, T., “Numerical Investigation of a Potential of Dedicated EGR System for Increasing Thermal Efficiency of SI Engines Fueled with Methane and Propane,” SAE Technical Paper 2015-01-1883 , 2015, doi:10.4271/2015-01-1883.
- Lee, S., Ozaki, K., Iida, N., and Sako, T., “A Potentiality of Dedicated EGR in SI Engines Fueled by Natural Gas for Improving Thermal Efficiency and Reducing NOx Emission,” SAE Int. J. Engines 8(1):238-249, 2015, 10.4271/2014-32-0108.
- Liang, L., Ge, H., Ge, H., and Zhao, P., “A 1-D Platform to Simulate the Effects of Dedicated EGR on SI Engine Combustion,” SAE Technical Paper 2017-01-0524 , 2017, doi:10.4271/2017-01-0524.
- Hatami, M., Ghazikhani, M., and Safari, B., “Effect of speed and load on exergy recovery in a water-cooled two stroke gasoline-ethanol engine for bsfc reduction purposes,” Medical Teacher 2(1):171-180, 2013.
- Ghazikhani, M., Hatami, M., and Safari, B., “The Effect of Alcoholic Fuel Additives on Exergy Parameters and Emissions in a Two Stroke Gasoline Engine,” Arabian Journal for Science & Engineering 39(3):2117-2125, 2014.
- List, H., “Thermodynamik derVerbrenngskraft-maschinen,” (Berlin, SpringerVerlag, 1939), 59.