Cfd Diagnostic Methodology for the Assessment of Mixture Formation Quality in GDI Engines 2011-24-0151
The fuel injection plays a crucial role in determining the mixture formation process in Gasoline Direct Injection (GDI) engines.
Pollutant emissions, and soot emissions in particular, as well as phenomena affecting engine reliability, such as oil dilution and injector coking, are deeply influenced by the injection system features, such as injector geometric characteristics (such as injector type, injector position and targeting within the combustion chamber) and operating characteristics (such as injection pressure, injection phasing, etc.).
In this paper, a new CFD methodology is presented, allowing a preliminary assessment of the mixture formation quality in terms of expected soot emissions, oil dilution and injector coking risks for different injection systems (such as for instance multihole or swirl injectors) and different injection strategies, from the early stages of a new engine design.
The proposed methodology, after a number of validation steps with experimental data gathered from different injection systems, has then been applied to guide the choice of the injector type, injection targeting and injection pressure and phasing for a GDI engine.
Citation: Millo, F., Badami, M., Bianco, A., and Delogu, E., "Cfd Diagnostic Methodology for the Assessment of Mixture Formation Quality in GDI Engines," SAE Int. J. Engines 4(2):2461-2476, 2011, https://doi.org/10.4271/2011-24-0151. Download Citation
Author(s):
Federico Millo, Marco Badami, Andrea Bianco, Enrico Delogu
Affiliated:
Politecnico di Torino
Pages: 16
Event:
10th International Conference on Engines & Vehicles
ISSN:
1946-3936
e-ISSN:
1946-3944
Also in:
SAE International Journal of Engines-V120-3, SAE International Journal of Engines-V120-3EJ
Related Topics:
Combustion chambers
Fuel injection
Emissions
Pressure
Particulate matter (PM)
Computational fluid dynamics
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