This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Diesel Combustion at High MEP with Low Compression Ratio
Annotation ability available
Sector:
Language:
English
Abstract
Very high mean effective pressures can be obtained from the diesel engine with limited maximum cylinder pressures by using a large clearance volume, that is, a low compression ratio, at high loads. The resultant low compression temperature is an added advantage as far as power production is concerned, but gives rise to excessive ignition delay and hence uncontrolled combustion.
This problem was studied in a single-cylinder four-stroke engine. Various methods of controlling combustion rate were found. The best combination of factors resulted in exceptionally smooth combustion and quiet running at a load of 400 psi bmep, using a compression ratio of 8:1, which gave a maximum pressure of only 1600 psi. Metal temperatures were well within the limits of normal usage. The low percentage heat and friction losses resulted in quite moderate rates of fuel consumption in spite of the low expansion ratio.
Recommended Content
Authors
Topic
Citation
Mansfield, W. and May, W., "Diesel Combustion at High MEP with Low Compression Ratio," SAE Technical Paper 660343, 1966, https://doi.org/10.4271/660343.Also In
References
- Mansfield, W. P. et al. “Development of the Turbo-charged Diesel Engine to High Mean Effective Pressures without High Mechanical or Thermal Loading.” CIMAC 1965
- Clerk D. Burls G. A. “Gas, Petrol and Oil Engines.” II 1910 200 212
- Meurer J. S. “Evaluation of Reaction Kinetics Eliminates Diesel Knock. The M-Combustion System of MAN.” SAE Transactions 64 1956
- Nagao, et al. “The Effect of Combustion Swirl on the Combustion in a Diesel Engine.” JSME Bulletin 3 11 1960
- Schweitzer P. H. Grunder L. J. “Hybrid Engines.” SAE Transactions 71 1963
- Mansfield W. P. “A New Servo-Operated Fuel Injection System for Diesel Engines.” Paper 650432 presented at SAE Mid-Year Meeting Chicago May 1965
- Helmich M. J. “Development of Combustion Air Refrigeration System Enabling Reliable Operation at 220 psi Bmep for a Large Four-Cycle Spark Ignited Gas Engine.” CIMAC 1965
- Lyn W. T. “Effect of Fuel Addition to Intake Air.” IME Proc. 168 9 1954
- Whitehouse Stotter Janota “Estimating the Effect of Altitude, Ambient Temperature and Turbocharger Match on Engine Performance.” IME Proc. 178 19 1963-1964
- Robinson R. R. Mitchell J. E. “Development of a 300 Psi Bmep Continuous Duty Diesel Engine.” Paper A. 7, CIMAC 1965
- Gupta C. P. Shipinski J. Uyehara O. A. Myers P. S. “Effects of Multiple Introduction of Fuel on Preflame Reactions in a Compression Ignition Engine.” SAE Transactions 74 1966
- Gupta C. P. Shipinski J. Uyehara O. A. Myers P. S. “Effects of Multiple Introduction of Fuel on Performance of a Compression Ignition Engine.” Paper 929A presented at SAE Powerplant Meeting Baltimore October 1964
- Wallace F. J. Wright E. J. “Characteristics of a Two-Stroke Opposed Piston, Compression Ignition Engine Operating at High Boost.” Proc. IME, 180 1965-1966 1
- Hull W. L. “High Output Diesel Engines.” Paper 631B presented at SAE Automotive Engineering Congress Detroit January 1963
- Robinson R. R. Mitchell J. E. “Development of a 3000 Psi Bmep Continuous Duty Diesel Engine.” Proc. CIMAC 1965 269
- Timoney S. G. “A New Concept in Traction Power-plants.” Proc. IME 180 1965-1966 2A
- Wallace W. A. Lux F. B. “A Variable Compression Ratio Engine Development.” SAE Transactions 72 1964 680