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An Experimental Study on a Six-Stroke Gasoline Homogeneous Charge Compression Ignition (HCCI) Engine with Continuously Variable Valve Duration (CVVD)
Technical Paper
2021-01-0512
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE WCX Digital Summit
Language:
English
Abstract
An experimental study was conducted on a multi-cylinder engine to understand the feasibility of a six-stroke homogeneous charge compression ignition (HCCI) operation under stoichiometric conditions. State-of-the-art technologies such as continuously variable valve duration (CVVD) and high-pressure gasoline direct injection (GDI) were experimentally exploited to increase the degree of freedom of engine control. The motivation of six-stroke HCCI combustion is to remedy the load limitation and the cyclic variation in four-stroke HCCI combustion with two additional strokes: compression and expansion strokes. The six-stroke HCCI combustion occurs in the following order. First, hot residual gas is trapped by applying negative valve overlap (NVO). Next, fresh air enters, fuel is injected, and lean HCCI combustion occurs in the 1st power stroke (PS). Subsequently, additional fuel is injected, and the 2nd combustion occurs with the remaining oxygen in the two additional strokes. In this study, we discuss the effect of various control variables, i.e., fuel split ratio, and injection timings, on the combustion phases of the two power strokes. In addition, we present the challenge of achieving proper combustion phasing in stoichiometric six-stroke HCCI operation, mainly in high load operation when we intend to split the load. As the load is more distributed to the 1st PS, it may lead to a significantly high mixture temperature at the beginning of the 2nd PS, which can result in a premature 2nd combustion phase. We discuss how the aforementioned control variables can be utilized to mitigate the challenge.
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Authors
- Woojae Shin - Seoul National University
- Myoungsoo Kim - Seoul National University
- Sechul Oh - Seoul National University
- ChongHoh Lee - Seoul National University
- Huiji Hwang - Seoul National University
- Han Ho Song - Seoul National University
- Hyeon Woo Kim - Hyundai Motor Company
- Baek Sik Kim - Hyundai Motor Company
- Kyoung Pyo Ha - Hyundai Motor Company
Citation
Shin, W., Kim, M., Oh, S., Lee, C. et al., "An Experimental Study on a Six-Stroke Gasoline Homogeneous Charge Compression Ignition (HCCI) Engine with Continuously Variable Valve Duration (CVVD)," SAE Technical Paper 2021-01-0512, 2021, https://doi.org/10.4271/2021-01-0512.Data Sets - Support Documents
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References
- Duoba , M. HEV Architectures and Vehicle Efficiency High Efficiency Hybrid Vehicles, ARPA-E Workshop Oct. 2017
- Szybist , J. , Wagner R. , and Curran S. Internal Combustion Engines for Hybrid Electric Configurations High Efficiency Hybrid Vehicles, ARPA-E Workshop Oct. 2017
- Hyvönen , J. , Haraldsson , G. , and Johansson , B. Supercharging HCCI to Extend the Operating Range in a Multi-Cylinder VCR-HCCI Engine SAE Technical Paper 2003-01-3214 2003 https://doi.org/10.4271/2003-01-3214
- Shi , L. , Cui , Y. , Deng , K. , Peng , H. et al. Study of Low Emission Homogeneous Charge Compression Ignition (HCCI) Engine Using Combined Internal and External Exhaust Gas Recirculation (EGR) Energy 31 14 2665 2676
- Oh , S. , Cho , S. , Seol , E. , Song , C. et al. An Experimental Study on the Effect of Stroke-to-Bore Ratio of Atkinson DISI Engines with Variable Valve Timing SAE Int. J. Engines 11 6 1183 1193 2018 https://doi.org/10.4271/2018-01-1419
- Nakata , K. , Nogawa , S. , Takahashi , D. , Yoshihara , Y. et al. Engine Technologies for Achieving 45% Thermal Efficiency of S.I. Engine SAE Int. J. Engines 9 1 179 192 2016 https://doi.org/10.4271/2015-01-1896
- Niu , R. , Yu , X. , Du , Y. , Xie , H. et al. Effect of Hydrogen Proportion on Lean Burn Performance of a Dual Fuel SI Engine Using Hydrogen Direct-Injection Fuel 186 792 799 2018 https://doi.org/10.1016/j.fuel.2016.09.021
- Fontana , G. , and Galloni , E. Variable Valve Timing for Fuel Economy Improvement in a Small Spark-Ignition Engine Applied Energy 86 1 96 105 2009 https://doi.org/10.1016/j.apenergy.2008.04.009
- Song , H. , and Edwards , C. Optimization of Recompression Reaction for Low-Load Operation of Residual-Effected HCCI SAE Technical Paper 2008-01-0016 2008 https://doi.org/10.4271/2008-01-0016
- Dec , J. , Yang , Y. , and Dronniou , N. Boosted HCCI - Controlling Pressure-Rise Rates for Performance Improvements using Partial Fuel Stratification with Conventional Gasoline SAE Int. J. Engines 4 1 1169 1189 2011 https://doi.org/10.4271/2011-01-0897
- Manofsky , L. , Vavra , J. , Assanis , D. , and Babajimopoulos , A. Bridging the Gap between HCCI and SI: Spark-Assisted Compression Ignition SAE Technical Paper 2011-01-1179 2011 https://doi.org/10.4271/2011-01-1179
- Rajput , O. , Ra , Y. , Ha , K. , and Son , Y. Numerical Analysis of a Six-Stroke Gasoline Compression Ignition (GCI) Engine Combustion With Continuously Variable Valve Duration (CVVD) Control ASME-ICEF 2018 2018 10.1115/ICEF2018-9590
- Conklin , J.C. , and Szybist , J.P. A Highly Efficient Six-Stroke Internal Combustion Engine Cycle with Water Injection for In-Cylinder Exhaust Heat Recovery Energy 35 4 1658 1664 2010 10.1016/j.energy.2009.12.012
- Chen , H. , Guo , Q. , Yang , L. , Liu , S. et al. A New Six Stroke Single Cylinder Diesel Engine Referring Rankine Cycle Energy 87 336 342 2015 10.1016/j.energy.2015.04.107
- Arai , M. , Amagai , K. , and Ida , Y. New Concept for Six-Stroke Diesel Engine SAE Technical Paper 941922 1994 https://doi.org/10.4271/941922
- Hayasaki , T. , Okamoto , Y. , Amagai , K. , and Arai , M. A Six-Stroke DI Diesel Engine Under Dual Fuel Operation SAE Technical Paper 1999-01-1500 1999 https://doi.org/10.4271/1999-01-1500
- Yamamoto , S. , Satou , T. , and Ikuta , M. Feasibility Study of Two-stage Hybrid Combustion in Gasoline Direct Injection Engines SAE Technical Paper 2002-01-0113 2002 https://doi.org/10.4271/2002-01-0113
- Rajput , O. , Ra , Y. , Ha , K.P. , and Son , Y.S. Numerical Study on Combustion Characteristics of Six-Stroke-Cycle Gasoline Compression Ignition Engine with Continuously Variable Valve Duration Valve Technology International Journal of Engine Research 1 19 2019 https://doi.org/10.1177/1468087419838390
- Rajput , O. , Ra , Y. , and Ha , K. Numerical Parametric Study of a Six-Stroke Gasoline Compression Ignition (GCI) Engine Combustion SAE Technical Paper 2019-01-0207 2019 https://doi.org/10.4271/2019-01-0207
- Rajput , O. , Ra , Y. , Ha , K. , and Kim , H. Numerical Parametric Study of a Six-Stroke Gasoline Compression Ignition (GCI) Engine* Combustion- Part II SAE Technical Paper 2020-01-0780 2020 https://doi.org/10.4271/2020-01-0780
- Ha , K.P. , Kim , W.T. , Ryu , I.S. , and Son , Y.S. Development of Continuously Variable Valve Duration (CVVD) Engine 25th Aachen Colloquium Automobile and Engine Technology 2016
- Cho , S. , Park , J. , Song , C. , Oh , S. et al. Prediction Modeling and Analysis of Knocking Combustion using an Improved 0D RGF Model and Supervised Deep Learning Energies 12 5 844 2019 10.3390/en12050844
- Savitzky , A. , and Golay , M.J. Smoothing and Differentiation of Data by Simplified Least Squares Procedures Analytical Chemistry 36 8 1627 1639 1964 10.1021/ac60214a047