This content is not included in your SAE MOBILUS subscription, or you are not logged in.
An Analysis of Light Emission Intensity Behavior Corresponding to Intermediate Products in Different Places of the Combustion Chamber
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 01, 2001 by SAE International in United States
Annotation ability available
Knocking is one phenomenon that can be cited as a factor impeding efforts to improve the efficiency of spark-ignition engines. With the aim of understanding knocking better, light emission spectroscopy was applied in this study to examine preflame reactions that can be observed prior to autoignition in the combustion reaction process of hydrocarbon fuels. Attention was focused on light emission behavior at wavelengths corresponding to those of formaldehyde (HCHO), Vaidya's hydrocarbon flame band (HCO) and the OH radical in a forced progression from normal combustion to a knocking state. Light emission behavior was measured simultaneously in the center and in the end zone of the combustion chamber when the engine was operated on two different test fuels. The test fuels used were n-heptane (0 RON) and a blended fuel (70 RON) consisting of n-heptane (0 RON) and iso-octane (100 RON). With n-heptane (0 RON) as the test fuel, behavior corresponding to the passage and degeneracy of a cool flame was observed. When the blended fuel (70 RON) was used, a tendency was observed for the preflame reaction interval of HCHO to become longer as combustion progressed from a normal state to trace knocking. As a result of analyzing the experimental data, the degree to which the preflame reactions observed in the end zone of the combustion chamber were influenced by flame propagation was confirmed quantitatively.
|Technical Paper||A Study of Knocking Using Ion Current and Light Emission|
|Technical Paper||A Comprehensive Study of Wankel Engine Performance|
|Technical Paper||Incomplete Combustion in one-End-Open Crevices|
CitationOhara, H., Ogawa, J., Yoshida, K., Shoji, H. et al., "An Analysis of Light Emission Intensity Behavior Corresponding to Intermediate Products in Different Places of the Combustion Chamber," SAE Technical Paper 2001-01-1882, 2001, https://doi.org/10.4271/2001-01-1882.
- Shoji, H., Saima, A., and Sasao, T., “The Behavior of Radical Luminescence Intensity in a Spark Ignition Engine” JSAE Review, Vol.13, No.1, P.4-19 (1992).
- Shoji, H., Saima, A., and Sasao, T., “Clarification of the Combustion Reaction Mechanism in a Spark Ignition Engine by Spectroscopic Analysis” JSAE Review, Vol.13, No.2, P.4-9 (1992).
- Livengood, J.C., Taylor, C.F. and Wu, P.C. “Correlation of Autoignition Phenomena in Internal Combustion Machines and Rapid Compression Machines”, 5th Symposium (International) on Combustion, P.347-356, 1954.
- Green, R.M., Cernansky, N.P, Pitz, W.J. and Westbook, C.K., “The Role of Low Temperature Chemistry in Autoignition of N-Butane”, SAE Paper 872108, 1987.
- Kono, M, S., Kumagai, S., and Inuma, K., “Thermodynamic and Experimental Determinations of Knocking Intensity by Using a Spark Ignited Rapid Compression Machine,” Combustion and Flame, Vol. 54,. P.33-47, 1983.
- Nakagawa, Y. et al., “Laser Shadowgraphy Analysis of Knocking,” Transactions of JSAE (in Japanese), No.28, P.43-49, (1984).
- Takagi, Y., Itoh, T. and lijima, T., “An Analytical Study on Knocking Heat Release and its Control in a Spark Ignition Engine”, SAE Paper 880196, 1988.
- Nakada, T., Itoh, T., and Takagi, Y., “Unburnt Gas Temperature Measurement Using Single Shot CARS in a Spark Ignition Engine”, COMODIA90, P.393, 1990.
- Ohta, Y., Furutani, M., Komatu, K., “Onset Behavior of Low-Temperature Autoignition Caused by Piston Compression.” The proceeding of the 10th Internal Combustion Engine Symposium (in Japanese), P. 265-270, 1992.
- Furutani, M., Ohta, Y., “A Novel Methhod of Eliminating Piston-Compression Ignition” Transaction of JSME (Japanese), Vol. 60, No. 571B, P.1074-1079, 1994.
- Leppard, W. R., “The Autoignition Chemistry of Isobutane: A motored Engine Study”, SAE Paper 881606, 1988.
- Leppard, W. R., “The Autoignition Chemistries of Primary Reference Fuels, Other Mixtures and Blending Octane Numbers”, SAE Paper 922325, 1992.
- Shoji, H., Shimizu, T., and Saima, A., “Spectroscopic Measurement of Radical Behavior Under Knocking Operation”, SAE Paper 962104, 1996.
- Ota, Y., Komuro, K., Matsushima, T., Yoshida, K., Shoji, H., and Saima, A., “Analysis of radical behabior under knocking operation in a spark ignition engine”, Proceeding of the 5th ASME/JSME Joint Thermal Engineering Conference AJTE99-6328 (1999).
- Ogawa, J., Akimune, K., Yoshida, K., Shoji, H., and Saima, A., “Analysis of OH, HCHO, and HCO Emission Intensity in a Progression from Normal Combustion to Knocking Operation in a Spark Ignition Engine” Seoul 2000 (28th) FISITA World Automotive Congress. Peper No. A162 (2000-6).
- Tosaka, Y., Shoji, H., and Saima, A., “A study of the influence of intermediate combustion products on knocking” JSAE Review 9533460, Vol.19, No.3, P.223-238 (1995).
- Gaydon, A. G., “The Spectroscopy of flames”, Chapman and Hall Ltd., London, 1957.
- Shiga, S., Heywood, J. B. and Chun, K. M., “Variation of Knocking Characteristics with the Chamber Wall Temperature in a Spark-Ignition Engine”, Transactions of JSME (in Japanese), Vol.56, No.530B, P.365-370, 1990.
- Kojima, S., “Detailed Modeling of n-Butane Autoignition Chemistry”, Combustion and Flame 99, 87-136, (1994).
- Kojima, S., “Visualization and Modeling of Knocking Phenomena”, Journal of Society of Automotive Engineers of Japan vol. 43, No. 11, P.65-73 1989.