This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Combustion Chamber Shape and Pressurized Injection in High-Speed Direct-Injection Diesel Engines
Annotation ability available
Sector:
Language:
English
Abstract
This paper deals with the effect of combustion chamber shape and the role of pressurized injection in high-speed direct-injection diesel engines. First, the previously reported good performance and emission characteristics of the reentrant chamber were confirmed in a single-cylinder engine test. To obtain a better insight into this excellence, a high-speed gas-sampling method was applied to determine the local fuel-air equivalence ratios and mass fractions of substances having higher boiling points during combustion. The results showed that even at a retarded injection the reentrant chamber suppressed the outflow of gas into the clearance space from containing a lot of higher-boiling-point substances, like raw fuel and carbonaceous matter, thereby assuring a less heterogeneous state than the ordinary deep-bowl chamber. This is attributed partly to the suppressed outflow of unburnt gas from the cavity and partly to the enhanced mixing near the entrance. In addition, the effect of the pressurized injection was also studied on the same test engine using a specially designed injection system consisting of a pressure booster piston. The test results show that at a high injection pressure the particulate emission can be reduced without increasing nitricoxide emission if an adequate nozzle orifice diameter is utilized.
Recommended Content
Topic
Citation
Ikegami, M., Fukuda, M., Yoshihara, Y., and Kaneko, J., "Combustion Chamber Shape and Pressurized Injection in High-Speed Direct-Injection Diesel Engines," SAE Technical Paper 900440, 1990, https://doi.org/10.4271/900440.Also In
References
- Kihara R. et al The Advantages of the Isuzu Square Combustion Chamber for D.I. Engines SAE Paper, No. 830372 1983
- Shigemori M. et al Development of a Combustion System for a Light Duty D.I. Diesel Engine SAE Paper, No. 831296 1983
- Bertodo R. et al Evolution of a New Combustion System for Diesel Emission Control SAE Paper, No. 741131 1974
- Ishida S. et al Development Status of a Small, Direct-Injection Diesel Engine at Isuzu SAE Trans. 94 Paper No. 850068 1985 359
- Kanairo K. et al Study of High Speed Diesel Engine Combustion Using High Speed Photography - Attempt to Obtain All Aspects of Combustion and Its Improvement Proceedings of COMODIA 85 1985 373
- Cartellieri W. P. et al Status Report on a Preliminary Survey of Strategies to Meet US-1991 HD Diesel Emission Standards Without Exhaust Gas Aftertreatment SAE Paper, No. 870342 1987
- Bird G. L. The Ford 2.5 Litre High Speed Direct Injection Diesel Engine - Its Performance and Future Possibilities SAE Trans. 94 Paper No. 850262 1985 453
- Saito T. et al Effects of Combustion Chamber Geometry on Diesel Combustion SAE Paper, No. 861186 1986
- Sugiyama K. LDV Measurement and Simulation of Air Motion in a Reentrant Combustion Bowl for a DI Diesel Engine Paper No. 865008, 21st FISITA Congress 1986
- Nagao F. Ikegami M. et al A Study on Combustion in Direct-Injection Diesel Engines 1st and 2nd Reports, Bulletin of the JSME 16 93 1973 588 599
- Sakata I. et al Development of a Technique for Direct-Injection Diesel's Mixture Formation by Controlling Spray Impingement and Local Swirl by Wall (in Japanese) Preprints of JSAE, No. 882, Paper No. 882080 1988 319
- Parker R. F. Future Fuel Injection System Requirements of Diesel Engines for Mobile Power SAE Paper, No. 760125 1976
- Kimberley J. A. et al UFIS - A New Diesel Injection System SAE Paper, No. 770084 1977
- Cross R. K. et al Electronic Fuel Injection Equipment for Controlled Combustion in Diesel Engines SAE Trans. 90 Paper No. 810258 1981 1136
- Komiyama K. et al Electronically Controlled High Pressure Injection System for Heavy Duty Diesel Engines - KOMPICS SAE Trans. 90 Paper No. 810997 1981 3112
- Beck N. J. et al Direct Digital Control of Electronic Unit Injector SAE Trans. 93 Paper No. 840273 1984 331
- Gill A. P. Design Choices For 1990's Low Emission Diesel Engines SAE Paper, No. 880350 1988
- Savery C. W. et al Injection Characteristics of High Pressure Accumulator Type Fuel Injector SAE Paper, No. 890266 1989
- Komiyama K. et al KOMPICS on a High BMEP Engine SAE Paper, No. 840513 1984
- Kamimoto T. et al Effect of High Injection on Soot Formation Processes in a Rapid Compression Machine to Simulate Diesel Flames SAE Paper, No. 871610 1987
- Kato T. et al Spray Characteristics and Combustion Improvement of D.I. Diesel Engine with High Pressure Fuel Injection SAE Paper, No. 890265 1989
- Arai M. et al Disintegrating Process and Spray Characterization of Fuel Jet Injected by a Diesel Nozzle SAE Paper, No. 840275 1984
- Wade W. R. et al Reduction of NOx Particulate Emission in the Diesel Combustion Process ASME Trans., GT & Power 109 1987 426
- Van Gerpen J. H. et al The Effects of Swirl and Injection Parameters on Diesel Combustion and Heat Transfer SAE Paper, No. 850265 1985
- Greeves G. Response of Diesel Combustion Systems to Increase of Fuel Injection Rate SAE Paper, No. 790037 1979
- Kakegawa K. et al A Study on Combustion of High Pressure Fuel Injection for Direct Injection Diesel Engine SAE Paper, No. 880422 1988
- Ikegami M. et al Trend and Origins of Particulate and Hydrocarbon Emission from a Direct-Injection Diesel Engine SAE Paper, No. 831290 1983
- Ikegami M. et al A Study of Soluble Organic Fractions in Particulates Emitted from a High-Speed Direct-Injection Diesel Engine SAE Paper, No. 890495 1989
- Miwa K. et al Combustion and Pollutant Formation in an Indirect Injection Diesel Engine SAE Trans. 89 Paper No. 800026 1980 104
- Fukuda M. et al Local Gas Composition in the Combustion Chamber of a Direct-Injection Diesel Engine JSAE Review 9 4 1988 24
- Wakuri Y. et al Studies on the Penetration of Fuel Spray in a Diesel Engine Bulletin of the JSME 3 1960 123
- Ikegami M. et al Diesel Combustion and the Pollutant Formation As Viewed from Turbulent Mixing Concept SAE Paper, No. 880425 1988