This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effects of Fuel Injection on Diesel Combustion
Annotation ability available
Sector:
Language:
English
Abstract
Additional data has been analyzed on the effect of engine size on thermal efficiency. The comparison has been expanded to show the trends separately for engines developed by several different manufacturers. The data confirm the conclusion that engines below 2.0 liters per cylinder seem to deteriorate in fuel economy faster than would have been predicted from the behavior of larger engines. It is postulated that such deterioration results from a combination of less than optimum fuel spray, wall wetting, and perhaps a greater heat transfer loss than was anticipated. The paper focuses on engines in the size range under two liters per cylinder and addresses some of the problems to be resolved. Means for generating and controlling fuel spray and injection rate shape are presented along with experimental data on fuel sprays and engine combustion. The conclusion is that combustion of medium and small size engines can be substantially improved by avoiding wall wetting yet maintaining fast burn rate through high pressure, short duration fuel injection. Front end injection rate shaping can eliminate the adverse effects of ignition delay.
Recommended Content
Authors
Topic
Citation
Beck, N., Uyehara, O., Emeritus, ., and Johnson, W., "Effects of Fuel Injection on Diesel Combustion," SAE Technical Paper 880299, 1988, https://doi.org/10.4271/880299.Also In
References
- “Factors that Affect BSFC and Emissions for Diesel Engines: Part 1 -Presentation of Concepts”, Uyehara O.A., SAE Paper No. 870343
- “Factors that Affect BSFC and Emissions for Diesel Engines: Part II -Experimental Confirmation of Concepts Presented in Part 1”, Beck, N. J. BKM, Inc., Uyehara, Otto A. Prof.Emeritus, SAE Paper No. 870344
- Engine Data Book '86, Published by San Kaido, Tokyo, Japan
- Engine Data Book 85', Published by San Kaido, Tokyo, Japan
- “Disintegrating Process and Spray Characterization of Fuel Jet Injected by a Diesel Nozzle”, Arai, Tabata,Hiroyasu and Shimizu,SAE Paper No. 840275
- “Fluid Mechanics of Electronically-Controlled High Pressure Fuel Injection”, Gebert, Kresimir Investigator & Savery, C. William Principal Investigator , Department of Mechanical Engineering, Portland State University, Contract 90-262-9465 for BKM, Inc.
- “A Small Direct Injection Diesel Engine with a Swirl Nozzle”, Aoyama et. al., Toyota Central R&D Labs, SAE Paper No. 870618
- “Effect of High Pressure Injection on Soot Formation Processes in a Rapid Compression Machine to Simulate Diesel Flames”, Kamimoto, TakeyukiYokota, Haruyuki and Kobayeshi, Haruki Tokyo Institute of Technology, SAE Paper No. 871610
- “A Study on a New Combustion System for DI Diesel - Conical Spray Combustion System”, Yuanxian, ZhuGuodong, Hu and Xiangyi, Wei Dalian Institute of Technology, Dalian, China, Chinese Society for I.C. Engines, Paper No. 871025
- U.S. Patent No. 3,830,433
- BKM Report, MR-582
- “Optimized Combination of Electronic and Mechanical Control of Fuel Injection Equipment for High Speed Direct Injection Diesel Engines”, Dolenc, AntonFreudenschuss, Otto Monobloc Diesel Engine Ltd. - ISATA 16th International Symposium on Automotive Technology and Automation, Florence Italy, May 1987
- Rice Lecture, Calvin W. Future Diesel Engines - Problems, Technologies and Challenges, Takashi Suzuki, Hino Motors, Ltd. - Presented at 11th Annual Energy Sources Technology Conference and Exhibition, January 10–13, 1988, New Orleans, LA.
- “Direct Digital Control of Electronic Unit Injectors”, Beck, N. JohnBarkhimer, Robert L.Calkins, Michael A.Johnson William P. and Weseloh, William E. BKM, Inc., SAE Paper No. 840273