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Analysis of the Combustion Characteristics of a HCCI Engine Operating on DME and Methane
Technical Paper
2007-32-0041
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English
Abstract
The Homogeneous Charge Compression Ignition (HCCI) engine has attracted much interest in recent years because it can simultaneously achieve high efficiency and low emissions. However, it is difficult to control the ignition timing with this type of engine because it has no physical ignition mechanism. Varying the amount of fuel supplied changes the operating load and the ignition timing also changes simultaneously. The HCCI combustion process also has the problem that combustion proceeds too rapidly. This study examined the possibility of separating ignition timing control and load control using an HCCI engine that was operated on blended test fuels of dimethyl ether (DME) and methane, which have vastly different ignition characteristics. The influence of the mixing ratios of these two test fuels on the rapidity of combustion was also investigated. Moreover, as a basic research subject, the behavior of formaldehyde (HCHO), an intermediate that is produced by cool flame reactions, was observed by spectroscopic techniques. The experimental results revealed that, within the range of the experimental conditions used in this study, the quantity of DME supplied substantially influenced the ignition timing, whereas it was little affected by the quantity of methane supplied. This indicates that the ignition timing can be controlled by the quantity of DME supplied and that the load can be adjusted by the quantity of methane supplied. Spectroscopic measurements of the behavior of a substance corresponding to HCHO also indicated that the quantity of DME supplied significantly influenced the cool flame. However, the rapidity of combustion could not be controlled even by varying the mixing ratios of DME and methane. It was made clear that changes in the ignition timing substantially influence the rapidity of combustion.
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Citation
TSUTSUMI, Y., HOSHINA, K., IIJIMA, A., and SHOJI, H., "Analysis of the Combustion Characteristics of a HCCI Engine Operating on DME and Methane," SAE Technical Paper 2007-32-0041, 2007.Also In
References
- Thring, R. H. “Homogeneous-Charge Compression-Ignition (HCCI) Engines” SAE paper 892068 1989
- Aoyama, T. Hattori, Y. Mizuta, J. Sato, Y. “An Experimental Study on Premixed-Charge Compression Ignition Gasoline Engine” SAE paper 960081 1996
- Hyvonen, J. “Operating Conditions Using Spark Assisted HCCI Combustion During Combustion Mode Transfer to SI in a Multi-Cylinder VCR-HCCI Engine” SAE paper 2005-01-0109 2005
- Yoshida, K. Koseki T. Shoji, H. et al. “Diversified Combustion Analysis of Homogeneous Change Compression Ignition Engine with Dimethyl Ether” JSAE Transactions 36 4 39 44 2005
- Willand, J. Nieberding, R. Vent, G. Enderle, C. “The Knocking Syndrome -Its Cure and Its Potential” SAE paper 982483 1998
- Omura, T. Iida, N. “A Study on Combustion Control by Using Internal and External EGR for HCCI Engines Fuelled with DME” SAE paper 2006-32-0045 2006
- Kaneko, M. Morikawa, K. Itoh, J. Saishu, Y. “Study on Homogeneous Charge Compression Ignition Gasoline Engine” The Fifth International Symposium on Diagnostics and Modeling of Combustion in Internal Combustion Engines (COMODIA 2001) 441 446 2001
- Eng, J. A. Leppard, W. A. Sloane, T. M. “The Effects of POx on the Autoignition Chemistry of n-Heptane and Isooctane in an HCCI Engine” SAE paper 2002-01-2861 2002
- Urushihara, T. Hiraya, K. Kakuhou, A. Itoh, T. “Expansion of HCCI Operating Region by the Combination of Direct Fuel Injection, Negative Valve Overlap and Internal Fuel Reformation” SAE paper 2003-01-0749 2003
- Urata, Y. Awasaka, M. Takanashi, J. Kakinuma, T. Hakozaki, T. Umemoto, A. “A Study of Gasoline-Fuelled HCCI Engine Equipped with An Electromagnetic Valve Train” SAE paper 2004-01-1898 2004
- Persson, H. Agrell, M. Olsson, J. O. Johansson, B. Ström, H. “The Effect of Intake Temperature on HCCI Operation Using Negative Valve Overlap” SAE Paper 2004-01-0944 2004
- Ozaki, J. Yamashita, D. Sato, S. Iida, N. “Effects of the Compositions of the Double Componential Fuel on the HCCI Combustion Mechanism” JSAE Transactions 37 6 121 126 2006
- Shoji, H. Tosaka, Y. Yoshida, K. Saima, A. “Radical Behavior in Preflame Reactions under Knocking Operation in a Spark Ignition Engine” SAE paper 942061 1994
- Shoji, H. Shimizu, T. Nishizawa, T. Yoshida, K. Saima, A. “Spectroscopic Measurement of Radical Behavior Under Knocking Operation” SAE paper 962104 1996
- Glassman Irvin “Combustion Third Edition” 589 603 1996
- Pilling, M. J. et al. “Low-Temperature Combustion and Autoignition” 35 XII XVI IX XVII 1997
- Konno, M. “Compression ignition mechanism of methane/DME composite fuel” Proceedings of the Mechanical Engineering Congress Japan III 119 120 2003
- Leppard, W. R. “The Autoignition Chemistry of Isobutane: A Motored Engine Study” SAE paper 881606 1988
- Leppard, W. R. “The Autoignition Chemstries of Primary Reference Fuels, Other Mixtures and Blending Octane Number” SAE paper 922325 1992
- Shoji, H. Saima, A. Shiino, K. Ikeda, S. “Clarification of Abnormal Combustion in a Spark Ignition Engine” SAE Transactions 101 1885 1895 1992
- Shoji, H. Saima, A. Shiino, K. “Simultaneous Measurement of Light Emission and Absorption Behavior of Unbunred Gas During Knocking Operation” SAE Transactions 102 1492 1499 1993
- Koyama, T. Ibaragi, Y. Iida, N. “Numerical Calculation of the Homogeneous Charge Compression Ignition Process by Using an Elementary Reaction Model of Dimethyl Ether” JSME Transactions 67 657B 165 171 May 2001
- Gaydon, A. G. “The Spectroscopy of Flame Second Edition” London Chapman and Hall Ltd. 1974
- Shudo, T. Nabetani, S. Nakajima, Y. “Analysis of Degree of Constant Volume and Cooling Loss in a Hydrogen Premixed Combustion Engine” JSAE Transactions 31 4 5 10 2000
- Muto, M. Nishimi, S. Shoji, H. et al. “Analysis of Combustion in DME and Methane Fueled HCCI Engine” JSAE Transactions 37 4 95 100 2006
- Fujimoto, K. Kajitani, S. Goto, S. Konno, M. et al. “DME Handbook (in Japanese)” Ohmsha Ltd. 2006
- Prothero, A. “Combustion and Flame” 13 4 339 408 1969
- Iijima, A. Shoji, H. “A Study of HCCI Combustion Characteristics Using Spectroscopic Techniques” SAE paper 2007-01-1886 2007