This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Impact of Multiple Injection Strategies on Efficiency and Combustion Characteristics in an Optical PPC Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Partially premixed combustion (PPC) is a promising way to achieve high thermal efficiency and low emissions, especially by using multiple injection strategies. The mechanisms behind PPC efficiency are still to be explained and explored. In this paper, multiple injections have been used to affect the gross indicated efficiency in an optical PPC engine modified from a Volvo MD13 heavy-duty diesel engine. The aim is both to improve and impair the gross indicated efficiency to understand the differences. The combustion natural luminosity is captured by a high-speed camera, and the distribution of fuel, oxygen, and temperature during the combustion process has been further explored by CFD simulation. The results show that with the right combination of the pilot, main, and post injection the gross indicated efficiency can be improved. Using a post injection in a triple-injection case show to have less effect on the combustion phasing than pilot injection in a double-injection case, while it can significantly affect combustion efficiency. The later of the double-injection cases tested (c30/16), has less heat transfer losses since the high-temperature region transported away from the cylinder head and piston bowl wall, which can be seen in the CFD-simulations. The highest gross indicated efficiency among the tested cases is given by the triple-injection case d38/24/6 as it reaches the best balance between the mixing and the local temperature through the jet-jet interactions and combustion-jet interactions.
CitationZhang, M., Xu, L., Derafshzan, S., Bai, X. et al., "Impact of Multiple Injection Strategies on Efficiency and Combustion Characteristics in an Optical PPC Engine," SAE Technical Paper 2020-01-1131, 2020, https://doi.org/10.4271/2020-01-1131.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
- Hasan, M.M. and Rahman, M.M. , “Homogeneous Charge Compression Ignition Combustion: Advantages over Compression Ignition Combustion, Challenges and Solutions,” Renew Sustain Energy Rev 57:282-291, 2016.
- Yao, M., Zheng, Z., and Liu, H. , “Progress and Recent Trends in Homogeneous Charge Compression Ignition (HCCI) Engines,” Prog Energy Combust Sci 35(5):398-437, 2009.
- Reitz, R.D. and Duraisamy, G. , “Review of High Efficiency and Clean Reactivity-Controlled Compression Ignition (RCCI) Combustion in Internal Combustion Engines,” Prog Energy Combust Sci 46:12-71, 2015.
- Li, Y., Jia, M., Liu, Y., and Xie, M. , “Numerical Study on the Combustion and Emission Characteristics of a Methanol/Diesel Reactivity-Controlled Compression Ignition (RCCI) Engine,” Appl Energy 106:184-197, 2013.
- Han, D., Ickes, A.M., Bohac, S.V., Huang, Z. et al. , “HC and CO Emissions of Premixed Low-Temperature Combustion Fueled by Blends of Diesel and Gasoline,” Fuel 99:13-19, 2012.
- Manente, V., Zander, C., Johansson, B., Tunestal, P. et al. , “An Advanced Internal Combustion Engine Concept for Low Emissions and High Efficiency from Idle to Max Load Using Gasoline Partially Premixed Combustion,” SAE Technical Paper 2010-01-2198, 2010, https://doi.org/10.4271/2010-01-2198.
- Shen, M., Lonn, S., and Johansson, B. , “Transition from HCCI to PPC Combustion by Means of Start of Injection,” SAE Technical Paper 2015-01-1790, 2015, https://doi.org/10.4271/2015-01-1790.
- Li, C., Yin, L., Shamun, S., Tuner, M. et al. , “Transition from HCCI to PPC: the Sensitivity of Combustion Phasing to the Intake Temperature and the Injection Timing with and without EGR,” SAE Technical Paper 2016-01-0767, 2016, https://doi.org/10.4271/2016-01-0767.
- Li, C., Xu, L., Bai, X., Tunestal, P. et al. , “Effect of Piston Geometry on Stratification Formation in the Transition from HCCI to PPC,” SAE Technical Paper 2018-01-1800, 2018, https://doi.org/10.4271/2018-01-1800.
- An, Y., Vallinayagam, R., Vedharaj, S., Masurier, J. et al. , “Analysis of Transition from HCCI to CI via PPC with Low Octane Gasoline Fuels Using Optical Diagnostics and Soot Particle Analysis,” SAE Technical Paper 2017-01-2403, 2017, https://doi.org/10.4271/2017-01-2403.
- Xu, L., Bai, X.S., Li, C., Tunestål, P. et al. , “Combustion Characteristics of Gasoline DICI Engine in the Transition from HCCI to PPC: Experiment and Numerical Analysis,” Energy 185:922-937, 2019.
- Xu, L., Bai, X.S., Li, C., Tunestål, P. et al. , “Emission Characteristics and Engine Performance of Gasoline DICI Engine in the Transition from HCCI to PPC,” Fuel 254, 2019.
- An, Y., Jaasim, M., Raman, V., Hernández Pérez, F.E. et al. , “Homogeneous Charge Compression Ignition (HCCI) and Partially Premixed Combustion (PPC) in Compression Ignition Engine with Low Octane Gasoline,” Energy 158:181-191, 2018.
- Bin, M., Chen, P., Liu, H., Zheng, Z., and Yao, M. , “Gasoline Compression Ignition Operation on a Multi-Cylinder Heavy Duty Diesel Engine,” Fuel 215:339-351, 2018.
- Kim, D. and Bae, C. , “Application of Double-Injection Strategy on Gasoline Compression Ignition Engine under Low Load Condition,” Fuel 203:792-801, 2017.
- Molina, S., Desantes, J., Garcia, A., and Pastor, J. , “A Numerical Investigation on Combustion Characteristics with the use of Post Injection in DI Diesel Engines,” SAE Technical Paper 2010-01-1260, 2010, https://doi.org/10.4271/2010-01-1260.
- Han, D., Zhai, J., and Huang, Z. , “Autoignition of n-Hexane, Cyclohexane, and Methylcyclohexane in a Constant Volume Combustion Chamber,” Energy Fuels 33:3576-3583, 2019.
- Patterson, M., Kong, S., Hampson, G., and Reitz, R. , “Modeling the Effects of Fuel Injection Characteristics on Diesel Engine Soot and NOx Emissions,” SAE Technical Paper 940523, 1994, https://doi.org/10.4271/940523.
- Nordin, P.A.N. , Complex Chemistry Modeling of Diesel Spray Combustion (Department of Thermo and Fluid Dynamics: Chalmers University of Technology, 2001).
- Zhang, Y., Jia, M., Liu, H., Xie, M. et al. , “Development of a New Spray/Wall Interaction Model for Diesel Spray under PCCI-Engine Relevant Conditions,” 24(1):41-80, 2014, doi:10.1615/AtomizSpr.2013008287
- Xu, L., Bai, X.S., Jia, M., Qian, Y. et al. , “Experimental and Modeling Study of Liquid Fuel Injection and Combustion in Diesel Engines with a Common Rail Injection System,” Applied Energy 230:287-304, 2018.
- Han, Z. and Reitz, R.D. , “A Temperature Wall Function Formulation for Variable-Density Turbulent Flows with Application to Engine Convective Heat Transfer Modeling,” International Journal of Heat and Mass Transfer 40(3):613-625, 1997, doi:10.1016/0017-9310(96)00117-2.
- Chang, Y. et al. , “Development of a Skeletal Mechanism for Diesel Surrogate Fuel by Using a Decoupling Methodology,” Combustion and Flame 162(10):3785-3802, 2015, doi:10.1016/j.combustflame.2015.07.016.
- Woschni, G. , “A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine,” SAE Technical Paper 670931, 1967, https://doi.org/10.4271/670931.