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Factors That Affect BSFC and Emissions for Diesel Engines: Part II Experimental Confirmation of Concepts Presented in Part I
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Abstract
Review of the theories, observations, and trends presented in Part I of this set of papers leads to the projection of certain aspects of injection sprays, mixture preparation, and combustion which may be designed to enhance diesel engine efficiency and reduce unwanted emissions. The basic concept is that control of the size, distribution and time of introduction of fuel droplets will result in a predictable optimized combustion event. Burning rate is controlled by droplet size and not by injection rate.
The results of the ideal combustion and mixture preparation models are compared with experimental data and show good correlation. The preference for high-pressure, short-duration, non-wall-wetting and uniformly distributed fuel sprays coupled with controlled fast diffusion burning is clearly evident. With high injection rates, it may be desirable to trade swirl rate for additional combustion air. Suggestions are made for practical means for achieving the results projected by the optimized model. Experimental results are presented to confirm the idealized model.
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Beck, N. and Uyehara, O., "Factors That Affect BSFC and Emissions for Diesel Engines: Part II Experimental Confirmation of Concepts Presented in Part I," SAE Technical Paper 870344, 1987, https://doi.org/10.4271/870344.Also In
References
- “Factors that Affect BSFC and Emissions for Diesel Engines: Part I -Presentation of Concepts” Uyehara Otto A. SAE Paper No. 870343
- “Sooting, Burning Rate as Influenced by Fuel Structure and Burning Conditions” Uyehara Otto A. SAE Paper No. 850112
- “Studies of the Combustion of Drops in a Fuel Spray - the Burning of Single Drops of Fuel” Godsave G.A.E. Fourth Symposium on Combustion (International) 18 1953
- “Investigation on the Characteristics of Diesel Fuel Spray” Kuniyoshi H. Sato G.T. Tanabe T.H. Fujimoto H. SAE Paper No. 800968
- “Active Thermo-Atomosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines” Onishi et al. SAE Paper No. 790501
- Loyd, R.W. U.S. Patent No. 4,414,940
- “Improvement of Exhaust Gas Emissions and Cold Startability of Heavy Duty Diesel Engines by New Injection-Rate-Control Pump Ishida Akio Kanamoto Takashi Kurihara Shigeo SAE Paper No. 861236
- “Sooting, Burning Rate as influenced by Fuel Stucture and Burning Conditions” Uyehara O. A. SAE Paper No. 850112
- “Disintegrating process and spray characterization of fuel jet injected by a diesel nozzle” Hiroyasu SAE Paper No. 840275
- “Direct Digital Control of Electronic Unit Injectors” Beck N.J. Barkhimer R.L. Calkins M.A. Johnson W.P. Weseloh W.E. BKM, Inc. SAE Paper No. 840273
- Beck et al. U.S. Patent No. 4,628,881
- “Electronic Fuel Injection for Two-Stroke Cycle Gasoline Engines” Beck N. J. et al SAE Paper No. 861242
- “Computations of Drop Sizes in Pulsating Sprays and of Liquid-Core Length in Vaporizing Sprays Kuo T.W. Bracco F. V. SAE Paper No. 820133
- “Diesel Engine Combustion and Its Modelling” Hiroyasu SAE Paper No. 800968
- “A Photographic Study of the Combustion of Low Cetane Fuels in a Diesel Engine Aided with Spark Assist” Abata D.L. Fritz S.G. Stoia B.J. SAE Paper No. 860066