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Spray Targeting Inside a Production-Type Intake Port of a 4-Valve Gasoline Engine
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Abstract
An experimental study was carried out to investigate the spray behavior inside engine intake ports. Production-type intake ports of four-valve gasoline engines were modified for the optical access at directions. The global spray formation process was visualized through laser Mie scattering technique. The spray breakup and atomization processes, spray targeting and fuel dispersing characteristics were investigated as a function of elapse time after fuel injection. The spray interaction with the port wall and port air flow were examined with different types of port fuel injectors including single-stream, multi-stream, and air-shrouded ones. The spray targeting and dispersing characteristics inside two different intake ports were examined. It was found that spray targeting and fuel dispersion inside the intake port are strongly dependent on the spray characteristics, as a result of different injector designs and injector installation positions. Single-stream injector has a good targeting capability but poor fuel dispersing characteristics. It causes a serious wall wetting on the port divider region when applied to a four-valve engine. Dual-stream injector shows an apparent improvement in reducing the port divider fuel wetting. In comparison, four-stream injector can better disperse the fuel across the intake port while with an increased port divider and port floor fuel wetting. The effect of air flow on the spray behavior was not significant for the intake ports examined in this study except for a slight spray acceleration. It was also found that the injector must be matched well with the intake port design. A careful selection of intake port geometry and injector can reduce the fuel wall wetting markedly.
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Zhao, F., Yoo, J., and Lai, M., "Spray Targeting Inside a Production-Type Intake Port of a 4-Valve Gasoline Engine," SAE Technical Paper 960115, 1996, https://doi.org/10.4271/960115.Also In
Analyzing Fuel Systems Technology for Fuel Economy and Emissions
Number: SP-1151; Published: 1996-02-01
Number: SP-1151; Published: 1996-02-01
References
- Zhao, F.-Q. Lai, M.-C. Harrington, D. L. 1995 “The Spray Characteristics of Automotive Port Fuel Injection - A Critical Review,” SAE Technical Paper , No. 950506
- Lai, M.-C. Zhao, F.-Q. 1995 “The Spray Characteristics of Automotive Port Fuel Injectors - Implications to the Mixture Formation Process and Engine Performance,” Proceedings of the 1995 KSEA International Technical Conference August 31 September 2 1995 San Francisco, California 112 131
- Posylkin, M. Taylor, A. M. K. P. Vannobel, F. Whitelaw, J. H. 1994 “Fuel Droplets Inside a Firing Spark-Ignition Engine,” SAE Technical Paper , No. 941989
- ElsaBer, A Samenfink, W. Hallmann, M. Wittig, S. 1994 “Mixing Phenomena of Fuel Sprays in Intake Manifolds,” Proceedings of ICLASS-94 758 765
- Vannobel, F. Dementhon, J. B. Robart, D. 1992 “Phase Doppler Anemometry Measurements on a Gasoline Spray inside the Inlet Port and Downstream of the Induction Valve; Steady Flow Conditions,” Laser Techniques and Applications in Fluid Mechanics; Proceedings of the 6th International Symposium Heitor, M. V. Maeda, M. Whitelaw, J. H. Springer-Verlag
- Nemecek, L. M. Wagner, R. M. Drallmeier, J. A. 1994 ‘Fuel And Air Studies for Spark Ignition Engine Cold Start Applications,” Proceedings of ILASS-America 191 195
- Nemecek, L. M. Wagner, R. M. Drallmeier, J. A. 1995 “Fuel Droplet Entrainment Studies for Minimization of Cold-Start Wall-Wetting,” SAE Technical Paper , No. 950508
- Pirault, J.-P. Quissek, F. Rokita, R. Winklhofer, E. 1993 “Development of Fuel Preparation for Petrol Engines,” IMechE Seminar
- Werlberger, P. Rokita, R. Chmela, F. 1994 “Observation of Fuel Injection and Combustion by Use of an Endoscopic Video System,” Proceedings of IMechE Seminar - Measurement and Observation Analysis of Combustion in Engines 39 56
- Nogi, T. Ohyama, Y. Yamaguchi, T. 1989 “Effects of Mixture Formation of Fuel Injection Systems in Gasoline Engine,” SAE Technical Paper , No. 891961
- Saito, K. Seldguchi, K. Imatake, N. Takeda K Yaegashi, T. 1995 A New Method to Analyze Fuel Behavior in a Spark Ignition Engine” SAE Technical Paper , No. 950044
- Kamal, M. M. 1995 “Automotive Industry Research Directions on Fuel/Air Mixture Preparation for Emission Control Proceedings of the 8th Annual Conference on Liquid Atomization and Spray Systems , ILASS-Americas 214 215
- DeYoung, C. A Kelly-Zion, P. L. Peters, J. E. White, R. A 1995 “In-cylinder Fuel Droplet Size and Wall Impingement Measurements,” Proceedings of the 8th Annual Conference on Liquid Atomization and Spray Systems , ILASS-Americas 221 225
- Lai, M.-C. Zhao, F.-Q. Amer, A. A. Chue, C.-H. 1994 “The Structure of Port Injector in Gasoline Engines,” Proceedings of International Symposium on Advanced Spray Combustion (ISASC) Hiroshima, Japan July 6-8 1994 79 89
- Lai, M.-C. Zhao, F.-Q. Amer, A. A. Chue, C.-H. 1994 “An Experimental and Analytical Investigation of the Spray Structure from Automotive Port Injectors,” SAE Technical Paper , No. 941873
- Amer, A. A. Lai, M.-C. 1995 “Time-Resolved Measurements of a Transient Gasoline Spray,” SAE Technical Paper , No. 950509
- Amer, A. A. Chue, T.-H. Zhao, F.-Q. Lai, M.-C. 1995 “Modeling Turbulence Primary Breakup and Its Application in Director-Plate-Compounded Port Injectors,” Proceedings of the 8th Annual Conference on Liquid Atomization and Spray Systems , ILASS-America May 21-24 1995 Troy, MI
- Zhao, F.-Q. Amer, A. A Lai, M.-C. Dressier, J. L. 1995 “Atomization Characteristics of Velocity-Modulated Port Injector Sprays in Gasoline Engines,” Proceedings of the 8th Annual Conference on Liquid Atomization and Spray Systems , ILASS-America May 21-24 1995 Troy, MI
- Zhao, F.-Q. Amer, A. A Lai, M.-C. Dressler, J. L. 1995 “The Effect of Fuel-Line Pressure Perturbation on the Spray Atomization Characteristics of Automotive Port Fuel Injectors,” SAE Technical Paper , No. 952486
- Zhao, F.-Q. Amer, A A. Lai, M.-C. Dressler, J. L. 1996 “Atomization Characteristics of Pressure-Modulated Automotive Port Injector Sprays,” J. of Atomization and Sprays
- Zhao, F.-Q. Yoo, J.-H. Lai, M.-C. 1995 “The Spray Characteristics of Dual-Stream Port Fuel Injectors for Applications to 4-Valve Gasoline Engines,” SAE Technical Paper , No. 952487
- Zhao, F.-Q. Yoo, J.-H. Lai, M.-C. 1996 “The Spray Structure of Air-Shrouded Dual-Stream Port Fuel Injectors with Different Air Mixing Mechanisms,” 1996 ASME Engine Technology Conference Youngstown, OH April 21-24 1996
- Zhao, F.-Q. Yoo, J.-H. Lai, M.-C. 1996 “A Critical Comparison of Dual-Stream Spray Structures for Applications to Two-Intake-Valve Gasoline Engines,” Paper Submitted to the 9th Annual Conference on Liquid Atomization and Spray Systems , ILASS-America May 19-22 1996 San Francisco, CA
- Iwata, M. Furuhashi, M. Ujihashi, M. 1986 “The Spray Characteristics and Engine Performance of EFI Injector,” Proceedings of the Technical Conference of JSAE No. 861 29 32
- Iwata, M. Furuhashi, M. Ujihashi, M. 1987 “Two-Hole Injector Improves Transient Performance and Exhaust Emissions of 4-Valve Engines,” SAE Technical Paper , No. 870125
- Martins, J. J. G. Finlay, I. C. 1992 “Fuel Preparation in Port-Injected Engines,” SAE Technical Paper , No. 920518