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The Effects of Pilot Injection on Combustion in Dimethyl-ether (DME) Direct Injection Compression Ignition Engine
Technical Paper
2007-24-0118
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Dimethyl-ether combustion with pilot injection was investigated in a single cylinder direct injection diesel engine equipped with a common-rail injection system. Combustion characteristics and emissions were tested with dimethyl-ether and compared with diesel fuel. The main injection timing was fixed to have the best timings for maximum power output. The total injected fuel mass corresponded to a low heating value of 405 joules per cycle at 800 rpm. The fuel quantity and the injection timing of the pilot injection were varied from 8 to 20% of the total injected mass and from 50 to 10 crank angle degrees before the main injection timing, respectively. Ignition delay decreased with pilot injection. The effects of pilot injection were less significant with DME combustion than with diesel. Pilot injection caused the main combustion to increase in intensity resulting in decreased emissions of hydrocarbons, carbon monoxide and particulate matter. The NOx emission with diesel combustion was increased because of the activation of main combustion by pilot injection. On the contrary, in DME combustion, the NOx emission was decreased below that of single injection when the pilot ratio was more than 12%.
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Yoon, H., Yeom, K., and Bae, C., "The Effects of Pilot Injection on Combustion in Dimethyl-ether (DME) Direct Injection Compression Ignition Engine," SAE Technical Paper 2007-24-0118, 2007, https://doi.org/10.4271/2007-24-0118.Also In
References
- Arcoumanis, C. Bae, C. Crookes, R. Kinoshita, E. “The Potential of di-methyl ether (DME) as an Alternative Fuel for Compression-Ignition engines : a review,” Fuel
- Yu, J. Bae, C. “Dimethyl Ether (DME) Spray Characteristics in a Common-rail Fuel Injection System,” Journal of Automobile Engineering, Proc. IMechE, Part D 217 12 1135 1144 2003
- Curran, H. J. Pitz, W. J. Westbrook, C. K. Dagaut, P. Boettner, J-C. Cathonnet, M. “A Wide Range Modeling Study of Dimethyl Ether Oxidation,” International Journal of Chemical Kinetics 30 3 229 241 1998
- Yamada, H. Sakanashi, H. Choi, N. Tezaki, A. “Simplified Oxidation Mechanism of DME Applicable for Compression Ignition,” SAE Paper 2003-01-1819 2003
- Cipolat, D. “Combustion Aspects of a compression Ignition Engines Fueled on DME,” 7th International Conference on Energy for a Clean Environment Lisbon 1 13 2003
- Sato, Y. Nozaki, S. Noda, T. “The Performance of a Diesel Engine for Light Duty Truck Using a Jerk Type In-Line DME Injection System,” SAE Paper 2004-01-1862 2004
- Oguma, M. Goto, S. Watanabe, T. “Engine Performance and Emission Characteristics of DME Diesel Engine With Inline Injection Pump Developed for DME,” SAE Paper 2004-01-1863 2004
- Oguma, M. Shiotani, H. Goto, S. Suzuki, S. “Measurement of Trace Levels of Harmful Substances Emitted from a DME DI Diesel Engine,” SAE Paper 2005-01-2202 2005
- Goto, S. Oguma, M. Suzuki, S. “Research and Development of a Medium Duty DME Truck,” SAE Paper 2005-01-2194 2004
- Tsuchiya T. Sato, Y. “Development of DME Engine for Heavy-duty Truck,” SAE Paper 2006-01-0052 2006
- Oguma, M. Goto, S. “Evaluation of Medium Duty DME Truck Performance -Field Test Results and PM Characteristics-,” SAE Paper 2007-01-0032 2007
- Tow, T. C. Pierpont, D. A. Reitz, R. D. “Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty D.I. Diesel Engine,” SAE Paper 940897 1994
- Tennison, P. J. Reitz, R. “An Experimental Investigation of the Effects of Common-rail Injection System Parameters on Emissions and Performance in a High-Speed Direct-Injection Diesel Engine,” Journal of Engineering for Gas Turbines and Power 123 1 167 174 2001
- Tanaka, T. Ando, A. Ishizaka, K. “Study on pilot injection of DI diesel engine using common-rail injection system,” JSAE Review 23 3 297 302 2002
- AVL Model 415S Smoke Meter Product Literature October 15 2002
- Heywood, JB. Internal Combustion Engine Fundamentals McGraw-Hill New York 1998
- Woschni, G. “A Universally Applicable Equation for the Instantaneous Heat transfer Coefficient in the Internal Combustion Engine,” SAE Paper 670931 1967