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Effect of In-Cylinder Liquid Fuel Films on Engine-Out Unburned Hydrocarbon Emissions for an SI Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 10, 2012 by SAE International in United States
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An experimental study was performed in a firing SI engine at conditions representative of the warmup phase of operation in which liquid gasoline films were established at various locations in the combustion chamber and the resulting impact on hydrocarbon emissions was assessed. Unique about this study was that it combined, in a firing engine environment, direct visual observation of the liquid fuel films, measurements of the temperatures these films were subjected to, and the determination from gas analyzers of burned and unburned fuel quantities exiting the combustion chamber - all with cycle-level resolution or better.
A means of deducing the exhaust hydrocarbon emissions that were due to the liquid fuel films in the combustion chamber was developed. An increase in exhaust hydrocarbon emissions was always observed with liquid fuel films present in the combustion chamber. This increase depended upon both the location of the film and the temperature of that location, and correlated directly with estimates of the mass of fuel in the film.
Also identified was when, during the exhaust event, fuel from the liquid fuel films was actually exhausted. Moreover, natural luminosity images of radiating soot particles formed near the liquid fuel films were obtained that aid and support the interpretation of these results.
CitationCostanzo, V. and Heywood, J., "Effect of In-Cylinder Liquid Fuel Films on Engine-Out Unburned Hydrocarbon Emissions for an SI Engine," SAE Technical Paper 2012-01-1712, 2012, https://doi.org/10.4271/2012-01-1712.
- Kidokoro, T. Hoshi, K. Hiraku, K. Satoya, K. et al. “Development of PZEV Exhaust Emission Control System,” SAE Technical Paper 2003-01-0817 2003 10.4271/2003-01-0817
- Costanzo, V.S. “Effect of In-cylinder Liquid Fuel Films on Engine-Out Unburned Hydrocarbon Emissions for SI Engines,” Ph.D. thesis Mechanical Engineering Department, Massachusetts Institute of Technology 2011
- Takeda, K. Yaegashi, T. Sekiquchi, K. Saito, K. et al. “Mixture Preparation and HC Emissions of a 4-Valve Engine with Port Fuel Injection During Cold Starting and Warm-up,” SAE Technical Paper 950074 1995 10.4271/950074
- Landsberg, G. Heywood, J. Cheng, W. “Contribution of Liquid Fuel to Hydrocarbon Emissions in Spark Ignition Engines,” SAE Technical Paper 2001-01-3587 2001 10.4271/2001-01-3587
- Cho, H. Kim, M. Min, K. “The Effect of Liquid Fuel on the Cylinder Liner on Engine-Out Hydrocarbon Emissions in SI Engines,” SAE Technical Paper 2001-01-3489 2001 10.4271/2001-01-3489
- Stanglmaier, R. Li, J. Matthews, R. “The Effect of In-Cylinder Wall Wetting Location on the HC Emissions from SI Engines,” SAE Technical Paper 1999-01-0502 1999 10.4271/1999-01-0502
- Li, J. Matthews, R. Stanglmaier, R. Roberts, C. et al. “Further Experiments on the Effects of In-Cylinder Wall Wetting on HC Emissions from Direct Injection Gasoline Engines,” SAE Technical Paper 1999-01-3661 1999 10.4271/1999-01-3661
- Huang, Y. Alger, T. Matthews, R. Ellzey, J. “The Effects of Fuel Volatility and Structure on HC Emissions from Piston Wetting in DISI Engines,” SAE Technical Paper 2001-01-1205 2001 10.4271/2001-01-1205
- Huang, Y. Matthews, R. Ellzey, J. Dai, W. “Effects of Fuel Volatility, Load, and Speed on HC Emissions Due to Piston Wetting,” SAE Technical Paper 2001-01-2024 2001 10.4271/2001-01-2024
- Cheng, W. Hamrin, D. Heywood, J. Hochgreb, S. et al. “An Overview of Hydrocarbon Emissions Mechanisms in Spark-Ignition Engines,” SAE Technical Paper 932708 1993 10.4271/932708