Experimental and Theoretical Study of Injection Parameters on Performance and Fuel Consumption in a Port-Injected Gasoline Engine 2005-01-3805
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.
Citation: Movahednejad, 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. Download Citation
E. Movahednejad, F. Ommi, M. Hossinalipour, M. Karbasforoushha
Faculty of Engineering, Tarbiat Modarres University, Tehran, School of Mechanical Engineering, Science and Technology University of Iran, Iran Khodro Engine Research Co. (IPCO
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