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Thermal Efficiency Improvement and its Mechanism at Low Load Conditions in Semi-Premixed Diesel Combustion with Twin Peak Shaped Heat Release
Technical Paper
2019-01-1153
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Semi-premixed diesel combustion with a twin peak shaped heat release with the two-stage fuel injection (twin combustion) has the potential to establish efficient, low emission, and low noise operation. However, with twin combustion at low loads the indicated thermal efficiencies are poorer than at medium loads due to the lower combustion efficiencies. In this report, to increase the combustion efficiencies at low loads, the thermal efficiency related parameters were investigated in a 0.55 L single cylinder diesel engine. The results show that the indicated thermal efficiency improves with increases in the intake gas temperatures at low loads. However, at the higher loads where the combustion efficiencies are somewhat higher the indicated thermal efficiencies decrease with increases in the intake gas temperatures due to increases in the cooling losses. At the low load condition below 300 kPa IMEP, the indicated thermal efficiency is higher and the combustion noise is lower in the twin combustion than in the single premixed combustion. Further, the combustion characteristics of twin and single premixed diesel combustion at low loads were analyzed with CFD simulation, showing that in the twin combustion, re-oxidation of the CO is promoted by the second-stage combustion and the indicated thermal efficiencies are higher than in the single premixed combustion due to higher combustion efficiencies. Both the heat flux value and the high heat flux area in the twin combustion are smaller than in the single premixed combustion due to decreases in the quantities of burned gas near the combustion chamber wall due to the separating of the fuel injections.
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Inaba, K., Masuko, Y., Zhang, Y., Kobashi, Y. et al., "Thermal Efficiency Improvement and its Mechanism at Low Load Conditions in Semi-Premixed Diesel Combustion with Twin Peak Shaped Heat Release," SAE Technical Paper 2019-01-1153, 2019, https://doi.org/10.4271/2019-01-1153.Data Sets - Support Documents
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References
- Akihama , K. , Takatori , Y. , Inagaki , K. et al. Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature SAE Technical Paper 2001-01-0655 2001 10.4271/2001-01-0655
- Hasegawa , R. and Yanagihara , H. HCCI Combustion in DI Diesel Engine SAE Technical Paper 2003-01-0745 2003 10.4271/2003-01-0745
- Ickes , A.M. , Bohac , S.V. , and Assanis , N.D. Effect of Fuel Cetane Number on a Premixed Diesel Combustion Mode Int. J. Engine Res. 10 4 251 263 2009
- Li , T. , Izumi , H. , Shudo , T. et al. Characterization of Low Temperature Diesel Combustion with Various Dilution Gases SAE Technical Paper 2007-01-0126 2007 10.4271/2007-01-0126
- Li , T. , Suzuki , M. , and Ogawa , H. Effects of In-Cylinder Temperature and Fuel Air Mixing Quality on Smokeless Low Temperature Diesel Combustion Proc. COMODIA 135 142 2008
- Li , T. , Suzuki , M. , and Ogawa , H. Characteristics of Smokeless Low Temperature Diesel Combustion in Various Fuel-Air Mixing and Expansion of Operating Load Range SAE Technical Paper 2009-01-1449 2009 10.4271/2009-01-1449
- Ogawa , H. , Li , T. , and Miyamoto , N. Characteristics of Low Temperature and Low Oxygen Diesel Combustion with Ultra-High EGR Int. J. Engine Res. 8 4 365 378 2007
- Takeda , T. , Nakagome , K. , and Niimura , K. Emission Characteristics of Premixed Lean Diesel Combustion with Extremely Early Staged Fuel Injection SAE Technical Paper 961163 1996 10.4271/961163
- Ogawa , H. , Xiong , Q. , Obe , T. et al. Improvements in Thermal Efficiency of Premixed Diesel Combustion with Optimization of Combustion Related Parameters and Fuel Volatilities Int. J. Engine Res. 16 1 81 91 2015
- Akagawa , H. , Miyamoto , T. , Harada , A. et al. Approaches to Solve Problems of the Premixed Lean Diesel Combustion SAE Technical Paper 1999-01-0183 1999 10.4271/1999-01-0183
- Hashizume , T. , Miyamoto , T. , Akagawa , H. et al. Emission Characteristics of a MULDIC Combustion Diesel Engine: Effects of EGR JSAE Review 23 3 428 430 1999
- Horibe , N. , Harada , S. , Ishiyama , T. et al. Improvement of Premixed Charge Compression Ignition Based Combustion by Two-Stage Injection Int. J. Engine Res. 10 2 71 80 2009
- Kitamura , T. and Ito , T. Mixing-Controlled, Low Temperature Diesel Combustion with Pressure Modulated Multiple-Injection for HSDI Diesel Engine SAE Technical Paper 2010-01-0609 2010 10.4271/2010-01-0609
- Kuzuyama , H. , Machida , M. , Kawae , T. et al. High Efficiency and Clean Diesel Combustion Concept Using Double Premixed Combustion: D-SPIA SAE Technical Paper 2012-01-0906 2012 10.4271/2012-01-0906
- Fuyuto , T. , Taki , M. , Ueda , R. et al. Noise and Emissions Reduction by Second Injection in Diesel PCCI Combustion with Split Injection SAE Technical Paper 2014-01-2676 2014 10.4271/2014-01-2676
- Ikeda , H. , Iida , N. , Kuzuyama , H. et al. An Investigation of Controlling Two-Peak Heat Release Rate for Combustion Noise Reduction in Split-injection PCCI Engine Using Numerical Calculation SAE Technical Paper 2014-32-0132 2014 10.4271/2014-32-0132
- Ogawa , H. , Shibata , G. , Sakane , Y. et al. Semi-Premixed Diesel Combustion with Twin Peak Shaped Heat Release Using Two-Stage Fuel Injection SAE Technical Paper 2016-01-0741 2016 10.4271/2016-01-0741
- Inaba , K. , Ojima , Y. , Masuko , Y. et al. Thermal Efficiency Improvement with Super-charging and Cooled EGR in Semi-premixed Diesel Combustion with a Twin Peak Shaped Heat Release Proc. THIESEL 2018
- Fuyuto , T. , Ueda , R. , Hattori , Y. et al. High Efficiency and Clean Diesel Combustion Using Double Premixed Ignition (Third report) Transactions of Society of Automotive Engineers of Japan 44 2 237 244 2013 10.11351/jsaeronbun.44.237
- Yamazaki , Y. and Iida , N. Numerical Calculation of Auto-Ignition and Combustion of n-Butane and Air Mixtures in Homogeneous-Charge Compression Ignition Engine: Control of Rapid Combustion, Maintenance of High Thermal Efficiency and/or HC and CO Reduction Transactions of Society of Automotive Engineers of Japan 33 4 69 75 2002
- Shimo , D. , Kim , A. , Kataoka , M. et al. Reduction of Exhaust Emissions and Fuel Consumption by Premixed Type Diesel Combustion (First Report) Transactions of Society of Automotive Engineers of Japan 42 4 867 872 2011 10.11351/jsaeronbun.42.867
- Tsurushima , T. A New Skeletal PRF Kinetic Model for HCCI Combustion Proceedings of the Combustion Institute 32 2 2835 2841 2009 10.1016/j.proci.2008.06.018