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Carburetor Exit Flow Characteristics
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English
Abstract
Three different carburetor types have been tested to observe differences in the characteristics of the fuel/air mixtures produced. To characterize the fuel/air mixtures, two diagnostics have been applied: 1) High speed movies and subsequent analysis of the exit flow, and 2) measurement of the A/F ratio found in different positions within the intake manifold.
The three different carburetor types that have been studied include a fixed-venturi, fixed-jet butterfly carburetor, a slide-valve carburetor, and a constant-velocity carburetor. Each carburetor type produced a unique set of exit flow characteristics, with differences in the optical density of fuel exiting the carburetor, and differences in the apparent amount of fuel on the intake manifold wall, entrained in the air flow, and in vapor phase.
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Authors
Citation
Itano, E., Shakal, A., Martin, J., Shears, D. et al., "Carburetor Exit Flow Characteristics," SAE Technical Paper 961730, 1996, https://doi.org/10.4271/961730.Also In
Design, Modeling, and Emission Control for Small Two- and Four-Stroke Engines
Number: SP-1195; Published: 1996-08-01
Number: SP-1195; Published: 1996-08-01
References
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- Bonneau, R.J. Cunningham MJ. Martin J.K. “A Flexible Fuel Mixture System and Fuel Mixture Effects on Utility Engine Emissions and Performance,” SAE Paper 952081 1995
- Cunningham, M.J. Martin J.K. Shears D. Poehlman A. “Effects of Mixture Preparation Characteristics on Four-Stroke Utility Engine En-iissions and Performance,” SAE Paper 961738 1996
- Westrate, Barbara L. Development of Diagnostics and Testing Methods for the Characterization of Carburetor Exit Flow Conditions University of Wisconsin - Madison 1994
- Westrate, B. Itano E. Hoffman J. Martin J.K. “The Development of Methods for the Characterization of Carburetor Exit Flow Conditions,” SAE Paper 952078 1995
- Tillock, B. Martin J.K. “Measurement and Modeling of Thermal Flows in An Air-Cooled Engine,” SAE Paper 961731 1996
- Heywood, J. B. Internal Combustion Engine Fundamentals McGraw-Hill Publishing Company New York, New York 1988