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Analysis in cyclic combustion Variation in a Lean Operating S.I. Engine
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English
Abstract
The causes of the cyclic combustion variation in a lean operating SI engine have been identified using multivariate analysis on the pressure-time data. Principal component analysis on the combustion characteristics obtained from the pressure-time data was conducted in order to select an index of an optimal released heat pattern for analyzing the causes of the cyclic combustion variation. Using this index and the released heat quantity, the IMEP variation was subjected to multiple regression analysis to identify the causes of the cyclic combustion variation.
Optimizing the fuel injection timing and swirl ratio made it possible to enrich the mixture near the spark plug. With the lean limit thus extended, a SI engine was operated in a lean range, and the resultant pressure-time data were analyzed. It was found that the main cause of the IMEP variation in the lean operating SI engine was the released heat quantity variation. In a relatively stable mixture range, the released heat quantity variation occured due to the combustion rate variation in the terminal stage of combustion, while around the lean limit, it occured due to the combustion rate variation in the early stage.
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Citation
Yamamoto, H. and Misumi, M., "Analysis in cyclic combustion Variation in a Lean Operating S.I. Engine," SAE Technical Paper 870547, 1987, https://doi.org/10.4271/870547.Also In
SAE 1987 Transactions: Reciprocating Engines--Spark Ignition and Diesel
Number: V96-4; Published: 1988-09-01
Number: V96-4; Published: 1988-09-01
References
- QUADER A. A. “The Axially-Stratified-Charge Engine” SAE paper 820131
- MATSUSHITA S. INOUE T. NAKANISHI K. KATO K. KOBAYASHI N. “Development of the Toyota lean Combustion System” SAE paper 850044
- PATTERSON D. J. “Pressure Variations, A Fundamental Combustion Problem” SAE paper 660129
- YOUNG M. E. “Cyclic Dispersion in the Homogeneous-Charge Spark-Ignition Engine-A Literature Survey” SAE paper 810020
- MATUOKA S. YAMAGUCHI T. UMEMURA Y. “Factors Influencing the Cyclic Variations of Combustion of Spark-Ignition Engine” SAE paper 710586
- MATEKUNAS F. A. “Modes and Measures of Cyclic Combustion Variability” SAE paper 830337
- BELMONT M. R. HANCOCK M. S. BUCKINGHAM D. J. “Statistical Aspects of Cyclic Variability” SAE paper 860324
- SANDA S. TODA T. NOHIRA H. KONOMI T. “Statistical Analysis of Pressure Indicator Data of an Internal Combustion Engine” SAE paper 770882
- WIEBE J. J. “Das Wiebe-Brenngesitz, ein Fortschnitt in der Thermodynamic der Kreigspozesse von Verbrennungsmotoren” Trans. Joute A. Dresen T. H. Kraftadrzeugtechnik 9 1960
- WOSCHNI G. “A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine” SAE paper 670931
- NAGAO A. TANAKA K. “The Effect of Swirl Control on Combustion Improvement of Spark Ignition Engine” IME C54/83
- NAKAI M. NAKAGAWA Y. HAMAI K. SONE M. “Stabilized Combustion in Spark Ignited Engine through a long Spark Duration” SAE paper 850075