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Relationship Between Local Air-Fuel Ratio and Combustion Character in Spark Ignition Engines
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English
Abstract
The authors developed a method to measure the air-fuel ratio at local points within the combustion chamber. The primary point is to obtain the pre-combustion air-fuel ratio of the mixture from the HC (vaporized fuel) and O2 concentrations. This procedure which consists of three parts, gas sampling, gas transport and gas analysis, renders it possible to perform direct quantitative HC analysis of samples.
This method is carried out by either of two techniques: multi-cycle sampling (MCS) and single cycle sampling (SCS), and the average air-fuel ratio of many engine-cycles and the single engine-cycle were obtained respectively.
Authors
- Tadashi Ayusawa - Engine Research Div., Japan Automobile Research Institute, Inc.
- Takaaki Nemoto - Engine Research Div., Japan Automobile Research Institute, Inc.
- Yoshiyuki Koo - Engine Research Div., Japan Automobile Research Institute, Inc.
- Souk Hong Jo - Engine Research Div., Japan Automobile Research Institute, Inc.
Citation
Ayusawa, T., Nemoto, T., Koo, Y., and Jo, S., "Relationship Between Local Air-Fuel Ratio and Combustion Character in Spark Ignition Engines," SAE Technical Paper 780147, 1978, https://doi.org/10.4271/780147.Also In
References
- Ayusawa T. Nemoto T. Koo Y. Jo S. H. “Measurement of an Air-Fuel Distribution in Combustion Chamber” Japan Automobile Research Institute, Inc. Technical Report No. 29 1976
- Nemoto T. Ayusawa T. Koo Y. Jo S. H. “Method of Direct Air-Fuel Ratio Measurement of Cycle-by-Cycle Variation at Local Position in the Combustion Chamber” JSME Preprint No. 750-15 1975 259
- Koo Y. Ayusawa T. Nemoto T. Jo S. H. “Measurement of Local Air-Fuel Ratio in a Stratified Charge Combustion Chamber” ISAE Preprint No. 771-35 1977
- Ayusawa T. Nemoto T. Koo Y. Jo S. H. “Measurement of Cycle-by-Cycle Air-Fuel Ratio at Spark Plug” JSAE Preprint No. 761 1977 63
- Asanuma T. Yanagihara S. “Study on a cyclic Drived Sampling Valve” Journal of JSAE 14 1960
- Ohigashi S. Hamamoto Y. “Cylinder Gas Composition of Small Two-Stroke Cycle Gasolin Engine” SAE 710143 1971
- Ekchian A. Heywood J. B. Rife J. M. “Time Resolved Measurement of the Exhaust from a Jet Ignition Prechamber Stratified Charge Engine” SAE Paper 770043 1977