Commenced in January 2007
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Effect of High Injection Pressure on Mixture Formation, Burning Process and Combustion Characteristics in Diesel Combustion

Authors: Amir Khalid, B. Manshoor


The mixture formation prior to the ignition process plays as a key element in the diesel combustion. Parametric studies of mixture formation and ignition process in various injection parameter has received considerable attention in potential for reducing emissions. Purpose of this study is to clarify the effects of injection pressure on mixture formation and ignition especially during ignition delay period, which have to be significantly influences throughout the combustion process and exhaust emissions. This study investigated the effects of injection pressure on diesel combustion fundamentally using rapid compression machine. The detail behavior of mixture formation during ignition delay period was investigated using the schlieren photography system with a high speed camera. This method can capture spray evaporation, spray interference, mixture formation and flame development clearly with real images. Ignition process and flame development were investigated by direct photography method using a light sensitive high-speed color digital video camera. The injection pressure and air motion are important variable that strongly affect to the fuel evaporation, endothermic and prolysis process during ignition delay. An increased injection pressure makes spray tip penetration longer and promotes a greater amount of fuel-air mixing occurs during ignition delay. A greater quantity of fuel prepared during ignition delay period thus predominantly promotes more rapid heat release.

Keywords: Mixture Formation, Diesel Combustion, Ignition Process, Spray, Rapid Compression Machine.

Digital Object Identifier (DOI):

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[1] Horibe, N., Annen, T., Miyazaki, Y. and Ishiyama, T., "Heat Release Rate and NOx Formation Process in Two-Stage Injection Diesel PCCI Combustion in a Constant-Volume Vessel", SAE paper 2010-01-0608, 2010.
[2] Okamoto, s., shibamoto, r., kidoguchi, y. and miwa, k., "effect of high turbulence mixing on reduction of exhaust emissions from a di diesel engine employing egr and pilot injection", trans. of jsae, vol.38, no.2, pp.93-99, 2007.
[3] Bruneaux, G., Verhoeven, D. and Baritaud, T., "High Pressure Diesel Spray and Combustion Visualization in a Transparent Model Diesel Engine", SAE Paper 1999-01-3468, 2009.
[4] Kidoguchi, Y., Fujita, Y., Umemoto, K., Miwa, K. and Omae, K., "A Study on Multi-hole Spray Interference and Mixture Formation in Diesel Combustion", Trans. of JSAE, Vol.39, No.3, pp.137-143, 2008.
[5] Yatsufusa, T., Kawakami, J., Kidoguchi, Y., Khalid, A., Fujita, Y. and Omae, K., "Effects of Supercharging, Swirl Strength and Fuel Injection Pressure on Development and Combustion of Diesel Spray", Trans. of JSAE, Vol.40, No.3, pp.755-761, 2009.
[6] Khalid, A., Hayashi, K., Kidoguchi, Y. and Yatsufusa, T., "Effect of Air Entrainment and Oxygen Concentration on Endothermic and Heat Recovery Process of Diesel Ignition", SAE Paper 2011-01-0002, pp.1- 10, 2011.
[7] Noge, H., Kidoguchi, Y. and Miwa, K., "A study on NO Reduction Caused by Thermal Cracking Hydrocarbons during Rich Diesel Combustion", JSME International Journal, Series B, Vol.49, No.2, pp.526-532, 2006.
[8] Kim, S.K., Wakisata, T. and Aoyagi, Y., "A Numerical Study of The Effects of Boost Pressure and Exhaust Gas Recirculation and Exhaust Emissions in a Diesel Engine", Int. J. Engine Res. Vol. 8, pp.147-162, 2006.
[9] Ogawa, H., Li, T., Miyamoto, N., Kido, S. and Shimizu, H., "Dependence of Ultra-High EGR and Low Temperature Diesel Combustion on Fuel Injection Conditions and Compression Ratio", SAE Paper 2006-01-3386, 2006.
[10] Ogawa, H., Li, T., Miyamoto, N., Kido, S. and Shimizu, H., "Dependence of Ultra-High EGR and Low Temperature Diesel Combustion on Fuel Injection Conditions and Compression Ratio", SAE Paper 2006-01-3386, 2006.
[11] Ishiyama, T., Miwa, K., Horikoshi, O., "A Study on Ignition Process of Diesel Spray", COMODIA1994, , pp337-342, 1994.
[12] Khalid, A., Yatsufusa, T., Miyamoto, T., Kawakami, J. and Kidoguchi, Y., "Analysis of Relation between Mixture Formation during Ignition Delay Period and Burning Process in Diesel Combustion", SAE Paper 2009-32-0018, pp.1-10, 2009.
[13] Sasaki, S., Ito, T. and Iguchi, T., "Smokeless Low Temperature Diesel Combustion Concept (First Report)-Soot-less Combustion at Near Stoichiometry and Rich Air Fuel Ratios by a Large Amount of Cooled EGR", Trans. of JSAE , 34-1, pp.65-70, 2003