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Experimental and Theoretical Study of Injection Parameters on Performance and Fuel Consumption in a Port-Injected Gasoline Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 24, 2005 by SAE International in United States
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For spark ignition engines, the fuel-air mixture preparation process is known to have a significant influence on engine performance and exhaust emissions. The structure of port injector spray dominates the mixture preparation process and strongly affects the subsequent engine combustion characteristics over a wide range of operating conditions in port-injection gasoline engines. In this paper, a one-dimensional, unsteady, multiphase flow has been modeled to study the mixture formation process in the intake manifold for a port-injected gasoline engine. Also, an experimental study is made to characterize the breakup mechanism and spray characteristics of a conventional Multi-hole injector used in the engine. The distributions of the droplet size and velocity and volume flux were characterized by a PDA system. One dimensional air flow and wall fuel film flow and a two dimensional fuel droplet flow have been modeled and it includes the effects of in-cylinder mixture back flows into the port. As a result, predictions are obtained that provide detailed picture of the air-fuel mixture properties along the intake port. A comparison was made on injection characteristics of the multi-hole injectors and its effects on multi-phase flow property on various fuel pressures and temperatures. According to the present investigation, it was found that the injector produces a finer spray with a wide spray angle in higher fuel pressures and temperatures that refine fuel-air mixture characteristics in intake port. Higher values of fuel temperature also produce optimum conditions for both exhaust emission and performance.
- E. Movahednejad - Faculty of Engineering, Tarbiat Modarres University, Tehran
- F. Ommi - Faculty of Engineering, Tarbiat Modarres University, Tehran
- M. Hossinalipour - School of Mechanical Engineering, Science and Technology University of Iran
- M. Karbasforoushha - Iran Khodro Engine Research Co. (IPCO
CitationMovahednejad, E., Ommi, F., Hossinalipour, M., and Karbasforoushha, M., "Experimental and Theoretical Study of Injection Parameters on Performance and Fuel Consumption in a Port-Injected Gasoline Engine," SAE Technical Paper 2005-01-3805, 2005, https://doi.org/10.4271/2005-01-3805.
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