This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of Different Turbocharging Systems on Performance in a HD Diesel Engine with Different Emission Control Technical Routes
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 17, 2016 by SAE International in United States
Annotation ability available
In this work, both the ‘SCR-only’ and ‘EGR+SCR’ technical routes are compared and evaluated after the optimizations of both injection strategy and turbocharging system over the World Harmonized Stationary Cycle (WHSC) in a heavy duty diesel engine. The exhaust emissions and fuel economy performance of different turbocharging systems, including wastegate turbocharger (WGT), variable geometry turbocharger (VGT), two-stage fixed geometry turbocharger (WGT+FGT) and two-stage variable geometry turbocharger (VGT+FGT), are investigated over a wide EGR range. The NOx reduction methods and EGR introduction strategies for different turbocharger systems are proposed to improve the fuel economy. The requirement on turbocharging system and their potential to meet future stringent NOx and soot emission regulations are also discussed in this paper. The experimental results show that retarding CA50 shows more advantages in improving soot emission and fuel economy than further closing the intake throttle valve, because the excess air ratio is critical to the combustion efficiency and soot oxidation when the NOx is kept at low level. As to ‘SCR-only’ technical route, reducing the injection pressure appropriately and advancing CA50 as early as possible are beneficial to fuel economy. The requirement on turbocharging system is varying at different NOx emission levels. The WGT, WGT+FGT, VGT and VGT+FGT are recommended to be adopted in ‘SCR+EGR’ technical route when the weighted NOx are controlled at 8.0 g/kWh, 5.0 g/kWh, 3.5 g/kWh and 2.8 g/kWh, respectively. Furthermore, according to the weighted results, the ‘SCR+EGR’ technical route shows more potential to meet the future more stringent NOx emission regulations compared to the ‘SCR-only’ technical route because of the superior fuel economy.
CitationLiu, J., Wang, H., Zheng, Z., Zou, Z. et al., "Effects of Different Turbocharging Systems on Performance in a HD Diesel Engine with Different Emission Control Technical Routes," SAE Technical Paper 2016-01-2185, 2016, https://doi.org/10.4271/2016-01-2185.
- Johnson, T., "Review of Vehicular Emissions Trends," SAE Int. J. Engines 8(3):1152-1167, 2015, doi:10.4271/2015-01-0993.
- Cloudt, I.R., Baert, I.R., Willems, I.F., and Vergouwe, M., "SCR-only Concept for Heavy-duty Euro VI Applications," MTZ worldwide 70(9):58-63, 2009, doi:10.1007/BF03226980.
- Yao, M., Zhang, Q., Liu, H., Zheng, Z. et al., "Diesel Engine Combustion Control: Medium or Heavy EGR?," SAE Technical Paper 2010-01-1125, 2010, doi:10.4271/2010-01-1125.
- Morgan, R., Banks, A., Auld, A., Heikal, M. et al., "The Benefits of High Injection Pressure on Future Heavy Duty Engine Performance," SAE Technical Paper 2015-24-2441, 2015, doi:10.4271/2015-24-2441.
- Wakisaka, Y., Hotta, Y., Inayoshi, M., Nakakita, K. et al., "Emissions Reduction Potential of Extremely High Boost and High EGR Rate for an HSDI Diesel Engine and the Reduction Mechanisms of Exhaust Emissions," SAE Int. J. Fuels Lubr. 1(1):611-623, 2009, doi:10.4271/2008-01-1189.
- Cloudt, R., Willems, F., and van der Heijden, P., "Cost and Fuel Efficient SCR-only Solution for Post-2010 HD Emission Standards," SAE Int. J. Fuels Lubr. 2(1):399-406, 2009, doi:10.4271/2009-01-0915.
- Vressner, A., Gabrielsson, P., Gekas, I., and Senar-Serra, E., "Meeting the EURO VI NOx Emission Legislation using a EURO IV Base Engine and a SCR/ASC/DOC/DPF Configuration in the World Harmonized Transient Cycle," SAE Technical Paper 2010-01-1216, 2010, doi:10.4271/2010-01-1216.
- Chi, J., "Control Challenges for Optimal NOx Conversion Efficiency from SCR Aftertreatment Systems," SAE Technical Paper 2009-01-0905, 2009, doi:10.4271/2009-01-0905.
- Zheng, M., Reader, G.T., and Hawley, J.G., "Diesel engine exhaust gas recirculation--a review on advanced and novel concepts," Energy Convers. Manage. 45(6):883-900, 2004, doi:10.1016/s0196-8904(03)00194-8.
- Maiboom, A., Tauzia, X., and Hétet, J.-F., "Experimental study of various effects of exhaust gas recirculation (EGR) on combustion and emissions of an automotive direct injection diesel engine," Energy 33(1):22-34, 2008, doi:10.1016/j.energy.2007.08.010.
- Millo, F., Giacominetto, P.F., and Bernardi, M.G., "Analysis of different exhaust gas recirculation architectures for passenger car Diesel engines," Appl. Energy 98:79-91, 2012, doi:10.1016/j.apenergy.2012.02.081.
- Lim, G., Choi, Y., Park, C., and Park, J., "Effects of HPL and LPL EGR Gas Mixed Supply on Combustion and Emissions in Automotive Diesel Engine," SAE Technical Paper 2011-01-1831, 2011, doi:10.4271/2011-01-1831.
- van Nieuwstadt, M., "Coordinated Control of EGR Valve and Intake Throttle for Better Fuel Economy in Diesel Engines," SAE Technical Paper 2003-01-0362, 2003, doi:10.4271/2003-01-0362.
- Chi, Y., Cheong, J., Kim, C., and Choi, K., "Effects of VGT and Injection Parameters on Performance of HSDI Diesel Engine with Common Rail FIE System," SAE Technical Paper 2002-01-0504, 2002, doi:10.4271/2002-01-0504.
- Johnson, T., "Vehicular Emissions in Review," SAE Int. J. Engines 5(2):216-234, 2012, doi:10.4271/2012-01-0368.
- Qi, D., Leick, M., Liu, Y., and Lee, C.-f.F., "Effect of EGR and injection timing on combustion and emission characteristics of split injection strategy DI-diesel engine fueled with biodiesel," 90(5):1884-91, 2011, doi:10.1016/j.fuel.2011.01.016.
- Heywood, J.B., "Internal combustion engine fundamentals", Mcgraw-hill New York, 1988, ISBN:0-07-028637-X.
- AVL, "The specification of AVL 415S filter smoke number meter," AVL List GMBH, Graz, Austria, 2007,
- Müller, M., Streule, T., Sumser, S., Hertweck, G., et al., "The Asymmetric Twin Scroll Turbine for DAIMLER Heavy Duty Engines," presented at Aufladetechnischen Konferenz, Germany, 2008.
- Müller, M., Streule, T., Sumser, S., Hertweck, G., et al., "The Asymmetric twin scroll turbine for exhaust gas turbochargers," presented at ASME Turbo Expo 2008: Power for Land, Sea, and Air, Germany, Jun 9-13, 2008.