This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Surrounding Combustion Process (SCP) - New Concept for Lean Burn Engine
Annotation ability available
Sector:
Language:
English
Abstract
Both NOx and unburned HC were reduced by changing the direction of the flame propagation. It is generally said that the optimum ignition position of spark ignition engine is in the center of combustion chamber. However by igniting arround the chamber and propagating the flame toward the center, a smooth heat release pattern due to the decrease in the flame area and a decrease in the unburned gas entering the ring crevise can be anticipated. These effects of this combustion process, which was named the surrounding combustion process (SCP), were experimntally confirmed using the constant volume combustion vessels and the spark ignition engine equipped with six spark plugs per cylinder.
Next, the steps for decreasing the number of ignitions TCre considered, and additional three spark plugs for SCP were installed in the four valve pentroof combustion chamber. With this engine, the NOx reduction and the capability of SCP to further improve the lean burn engine fuel economy were confirmed.
Authors
Topic
Citation
Yamamoto, H., Horita, S., and Matsuoka, T., "Surrounding Combustion Process (SCP) - New Concept for Lean Burn Engine," SAE Technical Paper 920058, 1992, https://doi.org/10.4271/920058.Also In
References
- Gommez, A. J. Reike, P. E. “Lean Burn:A Review of Incentives, Methods, and Tradeoffs” SAE paper 880291
- Matsushita, S. Inoue, T. Nakanishi, K. “Development of Toyota Lean Combustion System” SAE paper 850044
- Oda, H. Morita, Y. Fujishima, T. Marubara, M. “Investigation of High-Compression Lean Burn Engine” 4th IPC 871215
- Yamamoto, H. Misumi, M. “Analysis of Cyclic Combustion Variation in a Lean Operating S. I. Engine” SAE paper 870547
- Held, W. Konig, A. Richer, T. Puppe, L. “Catalytic NOx Reduction in Net Oxidizing Exhaust Gas” SAE paper 900496
- Wentworth, J. T. “Piston and Ring Variables Affect Exhaust Hydrocarbon Emissions” SAE paper 680109
- Haskell, W. W. Legate, C. E. “Exhaust Hydrocarbon Emissions from Gasoline Engines - Surface Phenomena” SAE paper 720255
- Dent, J. C. Lakshminarayanan, P. A. “A Model for Absorption and Desorption of Fuel Vapour by Cylinder Lubricating Oil Film and its Contribution to Hydrocarbon Emissions” SAE paper 830652
- Nakamura, N. Baika, T. Shibata, Y. “Multipoint Spark Ignition for Lean Combustion” SAE paper 852092
- Kuroda, H. Nakajima, Y. Sugihara, K. Takagi Y. Muranaka, S. “The Fast Burn with Heavy EGR, New Approach for Low NOx and Improved Fuel Economy” SAE paper 780006
- Anderson, R. W. Asik, J. R. “Ignitability in a Fast Burn, Lean Burn Engine” SAE paper 830477
- Wada, Y. Utsumi, M. Kono, M. Iinuma, K. “Fundamental Study of Combustion Control in Spark Ignition Engine: Part1 Effect of Number and Location of Spark Gaps.,” Trans. of JSAE 17 1979
- Durbin, E. J. Tsai, K. C. “Extending the Lean Limit Operation of an SI Engine with a Multiple Electrode Spark Plug” SAE paper 830476
- Tabata, M. Nagao, A. Iida, Y. “Studies of Fuel Droplets Behavior and Flame Propagation in Combustion Chamber on S. I. Engune Using Laser 2-D Visualization” COMODIA 90 179 1990
- Lavoie, G. A. Lorusso, J. A. Adamczyk, A. A. “Hydrocarbon Emissions Modeling for Spark Ignition Engines” Plenum Press 409 1980