Numerical Studies on the Combustion and Liquid Fuel Films Characteristics with the Dependence on Injection and Spark Timing of GDI Engine 2011-28-0060
GDI (gasoline direct injection) engine can be one of the
solutions to increase the fuel efficiency and reduce NOx (nitrogen
oxide) emissions. The LFF (liquid fuel film) formation within the
engine cylinder due to direct injection is an impediment to both
fuel efficiency and environment problems. To achieve the proper
operating conditions, liquid fuel film formation and combustion
characteristics in the cylinder of GDI engine must be
investigated.
The numerical simulations for the characteristics of GDI engine
including the effect of both fuel injection and spark timing have
been carried out to optimize the liquid fuel film phenomenon and
combustion characteristics. In this study, 3D unsteady
Eularian-Langrangian two-phase model was used to obtain an optimal
operating condition of a GDI engine by using S/W STAR-CD
(CD-adapco). The κ-ε/RNG model was used as a turbulence model.
Simulation results indicate the flow field and mixture distribution
inside the cylinder to obtain subsequent combustion and emission
characteristics. Moreover, conditions minimizing the amount of LFF
within cylinder have been suggested.
Citation: Seo, J., Kim, H., Bae, J., and Chung, J., "Numerical Studies on the Combustion and Liquid Fuel Films Characteristics with the Dependence on Injection and Spark Timing of GDI Engine," SAE Technical Paper 2011-28-0060, 2011, https://doi.org/10.4271/2011-28-0060. Download Citation
Author(s):
Ju Hyeong Seo, Ho Young Kim, Jin Woo Bae, Jin Taek Chung
Affiliated:
Korea Univ.
Pages: 10
Event:
16th Asia Pacific Automotive Engineering Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Engine cylinders
Fuel economy
Nitrogen oxides
Combustion and combustion processes
Energy conservation
Fuel injection
Wind tunnel tests
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