This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Cylinder Pressure Variations, A Fundamental Combustion Problem
Annotation ability available
Sector:
Language:
English
Abstract
Cylinder pressure variation is a fundamental and widespread combustion problem in spark-ignited engines. The basic factors causing this problem are variations both in the start and in the rate of combustion. These variations occur not only from cycle to cycle within each cylinder but may also show up as consistent differences between cylinders.
Our test results indicate that the major cause of cyclic combustion rate variation is the mixture velocity differences that exist within the cylinder near the spark plug at the time of ignition. As yet we do not know how to reduce the cyclic mixture velocity variations and thus reduce the problem at its origin. However, it is possible to circumvent some effects of cyclic pressure variation by increasing the average combustion rate.
Recommended Content
Citation
Patterson, D., "Cylinder Pressure Variations, A Fundamental Combustion Problem," SAE Technical Paper 660129, 1966, https://doi.org/10.4271/660129.Also In
References
- Caris, D. F. Mitchell, B. J. McDuffie, A. D. Wyczalek, F. A. “Mechanical Octanes for Higher Efficiency.” SAE Transactions 64 1956 84 92
- Andon Jerar Marks, Craig “Engine Roughness -- The Key to Lower Octane Requirements.” SAE Transactions 72 1964 636
- Curry, Shelly “A Three-Dimensional Study of Flame Propagation in a Spark Ignition Engine.” SAE Transactions 71 1963 628
- Vichnievsky, R. “Combustion in Petrol Engines.” Proc. Joint Conference on Combustion 1955 288
- Sale, B. Vichnievsky, R. “Etude de la Combustion sur le Monocylindre I.F.P. Renault C. N.R.S.” J. Soc. Ign. Auto. 31 October 1958 53
- Soltau, J. P. “Cylinder Pressure Variations in Petrol Engines.” Proc. Instn. Mech. Eng. 2 1960-61 99
- Averette, H. S. “A Study of Peak Pressure Variations in the Otto Cycle Engine.” 1964
- Semenov, E. S. “Device for Measuring Turbulence in Piston Engines.” Inst. and Exp. Tech. 1 1958 102
- Molchanov, K. K. “On the Problem of Gas Motion and Combustion in a Light Fuel Engine.” Trudy Moskovskogo Avtomobil'no-dorozh-nogo Inst. 17 1955 85