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The Effects of Injection Timing and Piston Bowl Shape on PHCCI Combustion with Split injections
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 12, 2010 by SAE International in United States
Annotation ability available
To reduce diesel engine emissions, a split injection strategy with PHCCI combustion in a diesel engine was investigated with simulation. A multidimensional CFD application, Star-CD coupled with a modified 2-D flamelet was used to simulate multiple injection combustion. Several mass ratios of the first injection and second injection conditions compared to the conventional pilot and main injection strategy were evaluated. The injection angle and the injection timing of the first injection were fixed to 150° and 55° BTDC, respectively. Because of the early injection, the in-cylinder pressure and temperature were much lower than those of normal injection conditions, and the fuel could not fully evaporate. As a result, wall impingement can be occurred, and THC and CO would be increased. To eliminate the wall impingement, the injection timing of the first injection was then retarded to 35-30° BTDC, and the piston bowl geometry was modified to capture droplets in the piston bowl. Subsequently, NOx and soot were reduced substantially. Finally, the piston bowl shape was modified again for spray re-entrance. In these results, NOx and soot were significantly reduced in all split conditions. The modified piston bowl shape was produced and validated in the engine experiment.
CitationLee, S., Choi, H., and Chung, J., "The Effects of Injection Timing and Piston Bowl Shape on PHCCI Combustion with Split injections," SAE Technical Paper 2010-01-0359, 2010, https://doi.org/10.4271/2010-01-0359.
- Najt, P. and Foster, D.E., “Compression-ignited Homogeneous Charge Combustion,” SAE Technical Paper 830264, 1983.
- Thring, R.H., “Homogeneous-Charge Compression Ignition (HCCI) Engines,” SAE Technical Paper 892068, 1989.
- Stanglmaier, R.H., and Roberts, C.E., “Homogeneous Charge Compression Ignition (HCCI): Benefits, Compromises, and Future Engine Application,” SAE Technical Paper 1999-01-3682, 1999.
- Musculus, M.P.B., Kattke, K., “Entrainment Waves in Diesel Jets,” SAE Int. J. of Engines 2(1):1170-1193, 2009.
- Yanagihara, H., Sato Y., and Mizuta J., A Study of DI diesel combustion under uniform higher-dispersed mixture formation, JSAE Review, Vol. 18, pp. 247-254, 1997.
- Yanagihara, H., Simultaneous Reduction of NOx and soot in diesel engines using a new mixture preparation method, JSME International Journal, Series B. Vol. 40 (4), 1997.
- Hasegawa, R., and Yanagisawa, H., “HCCI Combustion in DI Diesel Engine,” SAE Technical Paper 2003-01-0745, 2003.
- Akagawa H., Miyamoto, T., Harada, A., Sasaki, S., Shimazaki, N., Hashizume, T., “Approaches to Solve Problems of the Premixed Lean Diesel Combustion,” SAE Technical Paper 1999-01-0183, 1999.
- Yokota, H., Kudo, Y., Nakajima, H., and Suzuki, T., A New Concept for Low Emission Diesel Combustion,” SAE Technical Paper 970891, 1997.
- Iwabuchi, Y. Kawai, K., Shoki, T., Takeda, Y., “Trial of New Concept Diesel Combustion System-Premixed Compression-Ignition Combustion,” SAE Technical Paper 1999-01-0185, 1999.
- Walter, B. and Gatellier, B., Development of the High Power NADITM Concept using Dual Mode Diesel Combustion to achieve Zero NOx and Particulate Emissions,”SAE Technical Paper 2002-01-1744, 2002.
- Su, W., Wang, H. and Liu, B., Injection Mode Modulation for HCCI Diesel Combustion,” SAE Technical Paper 2005-01-0117, 2005.
- Beale, J. and Reitz, R., Modeling Spray Atomization with the Kelvin-Helmholtz / Rayleigh-Taylor Hybrid Model, Atomization and Spray, Vol. 9, pp. 623-650, 1999.
- O'Rourke, Collective Drop Effects on Vaporizing Liquid Sprays, Ph. D Thesis, Princeton University, 1981.
- Poling, B. E., Praustiz, J. M., and O'connel, J. P., The Properties of Gases and Liquids : Fifth Edition, Mcgraw-Hill, 2001.
- Spalding, D. B., The Combustion of Liquid Fuels, Fourth Symposium (International) on Combustion, The Combustion Institute, Pittsburge, Penn., 1953.
- Patel, A., Kong, S-C., Reitz, R., “Development and Validation of a Reduced Reaction Mechanism for HCCI Engine Simulations,” SAE Technical Paper 2004-01-0558, 2004.
- Peters, N., Laminar Diffusion Flamelet Models in Non-Premixed Turbulent Combustion, Prog. Energy Combust. Sci., Vol. 10, pp. 319-339, 1984.
- Hasse, C., and Peters, N., A Two Mixture Fraction Flamelet Model Applied to Split Injections in a DI Diesel Engine, Thirtieth Symposium (International) on Combustion, pp 2755-2762, 2005.
- Felsch, C., Gauding, M., Hasse, C., Vogel, S., and Peters, N., An extended flamelet model for multiple injections in DI Diesel engines, Proc. Combust. Inst., 32:2775-2783, 2009.
- Lim, J., Choi, S., Lee, K., Lee, J., and Min, K., Modeling of Combustion Process of Multiple Injection in HSDI Diesel Engines using Modified Two-Dimensional Flamelet,” SAE Technical Paper 2007-24-0042, 2007.
- Patel, A., Kong, S. C., and Reitz, R. D., “Development and Validation of a Reduced Reaction Mechanism for HCCI Engine Simulations,” SAE Technical Paper 2004-01-0558, 2004.
- Fucos, A., Knox-Kelecy, A. L., and Foster, D. E., Application of a Phenomenological Soot Model to Diesel Engine Combustion, COMODOA 94, pp 571-576, 1994.
- Hewson, J., Pollutant Emissions from Non-premixed Hydrocarbon Flames, PhD thesis, UC San Diego, 1997.