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Experimental Investigation of Single and Two-Stage Ignition in a Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2008 by SAE International in United States
Annotation ability available
This paper presents an experimental investigation conducted to determine the parameters that control the behavior of autoignition in a small-bore, single-cylinder, optically-accessible diesel engine. Depending on operating conditions, three types of autoignition are observed: a single ignition, a two-stage process where a low temperature heat release (LTHR) or cool flame precedes the main premixed combustion, and a two-stage process where the LTHR or cool flame is separated from the main heat release by an apparent negative temperature coefficient (NTC) region. Experiments were conducted using commercial grade low-sulfur diesel fuel with a common-rail injection system. An intensified CCD camera was used for ultraviolet imaging and spectroscopy of chemiluminescent autoignition reactions under various operating conditions including fuel injection pressures, engine temperatures and equivalence ratios. The chemiluminescent spectra were measured to confirm the presence of excited-state formaldehyde, (HCHO*), CH* and OH*, the spatial distribution of which were subsequently observed during the ignition period by filtered imaging. Experiment results based on the apparent rate of heat release (ARHR), indicate that ignition at lower engine temperatures and injection pressure of 400 bar is a single-stage process, however by increasing the injection pressure to 500 bar ignition becomes a two-stage process separated by a NTC region. Under warmed engine conditions, ignition follows the two-stage process at all fuel injection pressures examined. The ARHR correlated with the measured chemiluminescent intensity of HCHO*, both decreasing in the NTC region. The effect of injection pressure on the transition from a single to a two-stage ignition process is believed to result from different fuel spray evaporation rates determining local equivalence ratios during the temperature and pressure window of the LTHR mechanisms.
CitationJansons, M., Brar, A., Estefanous, F., Florea, R. et al., "Experimental Investigation of Single and Two-Stage Ignition in a Diesel Engine," SAE Technical Paper 2008-01-1071, 2008, https://doi.org/10.4271/2008-01-1071.
Combustion and Flow Diagnostics and Fundamental Advances inThermal and Fluid Sciences, 2008
Number: SP-2178 ; Published: 2008-04-14
Number: SP-2178 ; Published: 2008-04-14
- Heywood, J. B., Internal Combustion Engine Fundamentals, McGraw-Hill, New York, 1988.
- Obert, E. F., Internal Combustion Engines and Air Pollution, Harper & Row, New York, 1973.
- Curran, H. J., Gaffuri, P., Pitz, W. J. and Westbrook, C. K., “A Comprehensive Modeling Study of N-Heptane Oxidation”, Combustion and Flame, 114 (1-2), pg. 149-177, 1998.
- Minetti, R., Carlier, M., Ribaucour, M., Therssen, E. and Sochet, L. R., “A Rapid Compression Machine Investigation of Oxidation and Auto-Ignition of N-Heptane: Measuring and Modeling”, Combustion and Flame, 102 (3), pg. 298-309, 1995.
- Colin, O., da Cruz, A. P. and Jay, S., “Detailed Chemistry-Based Auto-Ignition Model Including Low Temperature Phenomena Applied to 3-D Engine Calculations”, Proceedings of the Combustion Institute, 30, pg. 2649-2656, 2005.
- Shibata, G., Oyama, K., Urushihara, T. and Nakano, T., “Correlation of Low Temperature Heat Release with Fuel Composition and Hcci Engine Combustion”, SAE Paper No. 2005-01-0138, 2005.
- Sjöberg, M. and Dec, J. E., “Comparing Late-Cycle Autoignition Stability for Single and Two-Stage Ignition Fuels in Hcci Engines”, Proceedings of the Combustion Institute, 31, pg. 2895-2902, 2007.
- Szybist, J. P., Boehman, A. L., Haworth, D. C. and Koga, H., “Premixed Ignition Behavior of Alternative Diesel Fuel-Relevant Compounds in a Motored Engine Experiment”, Combustion and Flame, 149 (1-2), pg. 112-128, 2007.
- Griffiths, J. F. and Barnard, J. A., Flame and Combustion, Chapman and Hall, London, 1995.
- Westbrook, C. K., Mizobuchi, Y., Poinsot, T. J., Smith, P. J. and Warnatz, E., “Computational Combustion”, Proceedings of the Combustion Institute, 30, pg. 125-157, 2005.
- Gaydon, A. G., Flames; Their Structure, Radiation and Temperature, Chapman and Hall, London, 1970.
- Dec, J. E., “Chemiluminescence Imaging of Autoignition in a Di Diesel Engine”, SAE Paper No. 982685, 1998.
- Dec, J. E., Hwang, W. and Sjöberg, M., “An Investigation of Thermal Stratification in Hcci Engines Using Chemiluminescence Imaging”, SAE Paper No. 2006-01-1518, 2006.
- Griffiths, J. F. and Whitaker, B. J., “Thermokinetic Interactions Leading to Knock During Homogeneous Charge Compression Ignition”, Combustion and Flame, 131 (4), pg. 386-399, 2002.
- Merola, S. S., Vaglieco, B. M., Corcione, F. E. and Mancaruso, E., “In-Cylinder Combustion Analysis by Flame Emission Spectroscopy of Transparent Cr Diesel Engine”, SAE Paper No. 2003-01-1112, 2003.
- Higgins, B. S., Siebers, D. L. and Aradi, A., “Diesel-Spray Ignition and Premixed-Burn Behavior”, SAE Paper No. 2000-01-0940, 2000.
- Benson, S. W., “The Kinetics and Thermochemistry of Chemical Oxidation with Application to Combustion and Flames”, Progress in Energy and Combustion Science, 7 (2), pg. 125-134, 1981.
- Naidja, A., Krishna, C. R., Butcher, T. and Mahajan, D., “Cool Flame Partial Oxidation and Its Role in Combustion and Reforming of Fuels for Fuel Cell Systems”, Progress in Energy and Combustion Science, 29 (2), pg. 155-191, 2003.
- Gaffuri, P., Faravelli, T., Ranzi, E., Cernansky, N. P., Miller, D., d'Anna, A. and Ciajolo, A., “Comprehensive Kinetic Model for the Low-Temperature Oxidation of Hydrocarbons”, American Institute of Chemical Engineers Journal, 43 (5), pg. 1278-1286, 1997.
- Dagaut, P., Reuillon, M. and Cathonnet, M., “Experimental Study of the Oxidation of N-Heptane in a Jet-Stirred Reactor from Low to High Temperature and Pressures up to 40 Atm”, Combustion and Flame, 101 (1-2), pg. 132-140, 1995.
- Minetti, R., Roubaud, A., Therssen, E., Ribaucour, M. and Sochet, L. R., “The Chemistry of Pre-Ignition of N-Pentane and 1-Pentene”, Combustion and Flame, 118 (1-2), pg. 213-220, 1999.
- Musculus, M. P. B., “Multiple Simultaneous Optical Diagnostic Imaging of Early-Injection Low-Temperature Combustion in a Heavy-Duty Diesel Engine”, SAE Paper No. 2006-01-0079, 2006.
- Yamaya, Y., Furutani, M. and Ohta, Y., “Premixed Compression Ignition of Formaldehyde-Doped Lean Butane/Air Mixtures in a Wide Range of Temperature”, SAE Paper No. 2004-01-1977, 2004.
- Shibata, G., “The Interaction between Fuel Chemicals and Hcci Combustion Characteristics under Heated Intake Air Conditions”, SAE Paper No. 2006-01-0207, 2006.
- Shibata, G. and Urushihara, T., “Auto-Ignition Characteristics of Hydrocarbons and Development of Hcci Fuel Index”, SAE Paper No. 2007-01-0220, 2007.
- Szybist, J. P. and Bunting, B., “Cetane Number and Engine Speed Effects on Diesel Hcci Performance and Emissions”, SAE Paper No. 2005-01-3723, 2005.
- Sjöberg, M. and Dec, J. E., “Effects of Engine Speed, Fueling Rate, and Combustion Phasing on the Thermal Stratification Required to Limit Hcci Knocking Intensity”, SAE Paper No. 2005-01-2125, 2005.
- Sjöberg, M. and Dec, J. E., “Combined Effects of Fuel-Type and Engine Speed on Intake Temperature Requirements and Completeness of Bulk-Gas Reactions for Hcci Combustion”, SAE Paper No. 2003-01-3173, 2003.
- Sohm, V., Kong, S.-C., Foster, D., Morikawa, T. and Iida, M., “A Computational Investigation into the Cool Flame Region in Hcci Combustion”, SAE Paper No. 2004-01-0552, 2004.
- Sjöberg, M. and Dec, J. E., “Smoothing Hcci Heat-Release Rates Using Partial Fuel Stratification with Two-Stage Ignition Fuels”, SAE Paper No. 2006-01-0629, 2006.
- Dec, J. E. and Sjöberg, M., “Isolating the Effects of Fuel Chemistry on Combustion Phasing in an Hcci Engine and the Potential of Fuel Stratification for Ignition Control”, SAE Paper No. 2004-01-0557, 2004.
- Olofsson, J., Seyfried, H., Richter, M., Alden, M., Vressner, A., Hultqvist, A., Johansson, B. and Lombaert, K., “High-Speed Lif Imaging for Cycle-Resolved Formaldehyde Visualization in Hcci Combustion”, SAE Paper No. 2005-01-0641, 2005.
- Sjöberg, M., Dec, J. E. and Hwang, W., “Thermodynamic and Chemical Effects of Egr and Its Constituents on Hcci Combustion”, SAE Paper No. 2007-01-0207, 2007.
- Christensen, M. and Johansson, B., “Influence of Mixture Quality on Homogeneous Charge Compression Ignition”, SAE Paper No. 982454, 1998.
- Dec, J. E., “A Computational Study of the Effects of Low Fuel Loading and Egr on Heat Release Rates and Combustion Limits in Hcci Engines”, SAE Paper No. 2002-01-1309, 2002.
- Maiboom, A., Tauzia, X., Hetet, J.-F., Cormerais, M., Tounsi, M., Jaine, T. and Blanchin, S., “Various Effects of Egr on Combustion and Emissions on an Automotive Di Diesel Engine: Numerical and Experimental Study”, SAE Paper No. 2007-01-1834, 2007.
- Nakano, M., Mandokoro, Y., Kubo, S. and Yamazaki, S., “Effects of Exhaust Gas Recirculation in Homogeneous Charge Compression Ignition Engines”, International Journal of Engine Research, 1 (3), pg. 269-279, 2000.
- Sjöberg, M. and Dec, J. E., “Egr and Intake Boost for Managing Hcci Low-Temperature Heat Release over Wide Ranges of Engine Speed”, SAE Paper No. 2007-01-0051, 2007.
- Kashdan, J. T. and Papagni, J.-F., “Lif Imaging of Auto-Ignition and Combustion in a Direct-Injection, Diesel-Fuelled Hcci Engine”, SAE Paper No. 2005-01-3739, 2005.
- Kanda, T., Hakozaki, T., Uchimoto, T., Hatano, J., Kiyayama, N. and Sono, H., “Pcci Operation with Early Injection of Conventional Diesel Fuel”, SAE Paper No. 2005-01-0378, 2005.
- Inagaki, K., Fuyuto, T., Nishikawa, K., Nakakita, K. and Sakata, I., “Combustion System with Premixture-Controlled Compression Ignition”, R&D Review of Toyota CRDL, 41 (3), pg. 35-46, 2006.
- Collin, R., Nygren, J., Richter, M., Alden, M., Hildingsson, L. and Johansson, B., “The Effect of Fuel Volatility on Hcci Using Simultaneous Formaldehyde and Oh Plif”, SAE Paper No. 2004-01-2948, 2004.
- Singh, I., Zhong, L., Lai, M.-C., Henein, N. A. and Bryzik, W., “Effect of Nozzle Hole Geometry on a Hsdi Diesel Engine-out Emissions”, SAE Paper No. 2003-01-0704, 2003.
- Singh, J., Poonawala, Y., Singh, I., Henein, N. A. and Bryzik, W., “The Investigation of the Low Temperature Combustion Regime (LTC) in a Small Bore HSDI Diesel Engine”, ASME Internal Combustion Engine Division Spring Technical Conference, Paper No. ICES2005-1033, 2005.
- Henein, N. A., Bhattacharyya, A., Schipper, J., Kastury, A. and Bryzik, W., “Effect of Injection Pressure and Swirl Motion on Diesel Engine-out Emissions in Conventional and Advanced Combustion Regimes”, SAE Paper No. 2006-01-0076, 2006.
- Pearse, R. W. B. and Gaydon, A. G., The Identification of Molecular Spectra, Chapman and Hall, London, 1976.
- Costa, M., Vaglieco, B. M. and Corcione, F. E., “Radical Species in the Cool-Flame Regime of Diesel Combustion: A Comparative Numerical and Experimental Study”, Experiments in Fluids, 39 (3), pg. 512-524, 2005.