This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Factors Influencing the Cyclic Variation of Combustion of Spark Ignition Engine
Annotation ability available
Sector:
Language:
English
Abstract
A statistical measurement of cyclic variation in combustion of a spark ignition engine generated by changes of mixture conditions in the cylinder was compared with the actual measurement of variation of flow velocity and mixture ratio.
From these statistical data plus further analytical study, the correlations between the combustion speed, flow velocity, and mixture ratio were shown. These correlations explain the causing reason of combustion variation-it increases with the increase of combustion period.
Regarding cyclic variation of combustion, although every possible factor influencing the variation of combustion was eliminated there still remains the variation caused by the variation of mean flow velocity in the cylinder. Thus, to decrease the combustion variation, it is fundamentally necessary to raise the combustion speed and decrease the variation of mean flow velocity in the cylinder. Since the rate of increase of the combustion variation caused by the variation of flow velocity decreases when the flow velocity becomes faster, the fast swirling one directional undisturbed main stream increases the combustion speed and is accompanied by small cyclic fluctuation which produce stronger turbulence that efficiently contribute to this effect.
By measuring the curve of S(dp/dt) max versus mixture ratio, it was possible to indicate whether mixture ratio or velocity variations were causing cyclic fluctuations. Also it was clarified that Tpmax was able to accurately indicate the trend of mean combustion period.
Recommended Content
| Book | Introduction to Internal Combustion Engines, Third Edition |
Citation
Matsuoka, S., Yamaguchi, T., and Umemura, Y., "Factors Influencing the Cyclic Variation of Combustion of Spark Ignition Engine," SAE Technical Paper 710586, 1971, https://doi.org/10.4271/710586.Also In
References
- Broeze Ir. J.J. “Combustion in Internal Combustion 11. The spark ignition engine.” Engineering 169 4396 April 28 1950 464
- Schnaufler K. “Engine-Cylinder Flame-Propagation Studied by New Method.” SAE Journal 34 January 1934
- Clarke J. S. “Initiation and Some Controlling Parameters of Combustion in Automobile Engines.” SAE Transactions 70 1962
- Curry S. “A Three-Dimensional Study of Flame Propagation in a Spark Ignition Engine.” SAE Transactions 71 1963
- Cantwell, E. N. Jr. “Engine Roughness: the Key to Lower Octane Requirement,” Andon Jerar Marks Craig SAE Transactions 72 1964 paper 647A
- Curry S. “The Relationship between Flame Propagation and Pressure Development During Knocking Combustion.” Paper 647B SAE Automotive Engineering Congress Detroit January 1963
- Adams W. E. “Engine Roughness: the Key to Lower Octane Requirement,” Andon Jeror Marks Craig SAE Transactions 72 1964 paper 647A
- Curry S. “Effect of Antiknocks on Flame Propagation in a Spark Ignition Engine.” 9th Symposium (International) on Combustion 1962
- Andon J. Marks C. “Engine Roughness - The Key to Lower Octane Requirement.” SAE Transactions 72 1964 paper 647A
- Rassweiler G. M. Withrow L. “Slow Motion Shows Knocking and Non-Knocking Explosions.” SAE Journal 39 August 1939
- Ricardo H. R. “High Speed Internal Combustion Engine.” Blackie and Son Ltd. 1958
- Ogasawara K. Matsuda M. “Experimental Study of Delay of Flame Propagation on S. I. Engine.” Transactions-JSME 245
- Kim E. “Combustion Characteristics and Cyclic Variation of Pressure on Automotive S. I. Engine.” Transactions-JSME 252 1967 256 1967 1967 5 1968
- Patterson D. L. “Cylinder Pressure Variation - A Fundamental Combustion Problem.” SAE Transactions 75 1967 paper 660129
- Ohigashi S. Hamamoto “Combustion Variation on Small Two-Stroke S. I.Engine.” Transactions-JSME 260 1968
- Semenov E. S. “Device for Measuring the Turburence in Piston Engines.” Institute of Chemical Physics of the Academy of Science USSR
- Asanuma T. Yanagihara S. “Gas Sampling Valve for Measuring Scavenging Efficiency in High-Speed Two-Stroke Engines.” SAE Transactions 70 1962
- Bolt J. A. Harrington D. L. “The Effects of Mixture Motion upon the Lean Limit and Combustion of Spark-Ignition Mixtures.” SAE Transactions 76 paper 670467
- Matsuoka S. “No Zero Shift Developed Higher Performance Strain Gage Type Engine Indicator.” SAE Transactions 70 1962
- Peters B. D. Borman G. L. “Cyclic Variation and Average Burning Rates in a Spark Ignition Engine.” Paper 700064 SAE Automotive Engineering Congress Detroit January 1970
- Annand W. J. D. Summers I. G. S. “Observations on the Variability of Spark Ignition Combustion Using a Single-Cyclic Simulator.” Paper 700487 SAE Mid-Year Meeting Detroit May 1970
- Barton R. K. Kenenwtz D. K. Lestz S. S. Myer W. E. “Cyclic by Variation of a Spark Ignition Engine-A Statistical Analysis.” Paper 700488 SAE Mid-Year Meeting Detroit May 1970
- Matsuoka S. Yamaguchi T. “Relationship Between the Variation of Combustion and Variation of Mixture in the Cylinder of S. I. Engine.” Nai-nen-Kikan (Internal Combustion Engine) 8 84 1969 786th-JSME-Meeting 1969
- Matsuoka S. “Cyclic Variation of Combustion of S. I. Engine.” JSME-Meeting 710-5 April 1971