This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Numerical and Experimental Analysis of a Cold Start System Used in Flex Fuel Engines with Heating of Intake Air and Ethanol
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 06, 2009 by SAE International in United States
Annotation ability available
The use of pure ethanol or the prevailing of it in the mixture with gasoline in flex fuel engines, led to a necessity of an auxiliary system to the cold start and engine functioning. Ethanol chemical properties can be used to explain this necessity. Ethanol is been used in Brazil for more than 30 years and many researches give support to the cold start technologic evolution. The cold start system enables the gasoline introduction into the intake manifold of flex fuel engines, when vehicles are using pure ethanol or a mixture with more ethanol than gasoline. The researches challenge is to find a way to start an engine using ethanol without the use of the cold start system using gasoline. This works presents a numerical analysis of the flow and heat transfer in a cold start system, using computational fluid dynamics. An experimental test bench developed to study a start cold system heating air and ethanol. The objective is to use this system to assure the engine operation at low ambient temperatures. The simulations were validated using the experimental data and results shows the possibility to get a temperature high enough to assure fuel combustion.
CitationSales, L., Barbosa, R., de Andrade Martins, L., Huebner, R. et al., "Numerical and Experimental Analysis of a Cold Start System Used in Flex Fuel Engines with Heating of Intake Air and Ethanol," SAE Technical Paper 2009-36-0300, 2009, https://doi.org/10.4271/2009-36-0300.
- Sales, L.C.M. Sodré J.R. 2002 “Optimized Cold Start Auxiliary System for Emissions Reduction in Ethanol-Fuelled Engines” SAE, Inc. (Org.). SAE — Alternative Fuels 2002 v. 1725 1 6
- Sales, L.C.M. Sodré J.R. 2003 “Reducing Exhaust Emissions in Ethanol-Engines During Cold start Combustion Science and Technology USA 1535 1550
- Brunocilla M. Lepsch F. 2006 “Influence of hot fuel injection on air/fuel mixture preparation and effects on flex fuel engines” SAE 2006-01-2619 Tech. Paper
- Owen, K. e Coley, T. 1995 “Automotive Fuels Reference Book” Second Edition SAE, Inc
- Annand W.V.D. Guider O.L. 1980 “Exhaust Emissions and Cold Starting of a Four-Cylinder Engine Using Methanol as Fuel” Proc. Instn. Mehc. Engrs. Vol. 194 139 143
- Kito B.T. Pacas A.D. Selim S. Cowley S.W. 1998 “Properties of an Ethanol-Diethyl Ether-Water Fuel Mixture for Cold-Start Assistance of an Ethanol-Fuelled Vehicle” American Chemical Society, Colorado USA
- Sales et al 2007 “Distribution of the Fuel Flow in a Cold Start System Using an Electronic Fuel Injector” SAE 2007-01-2706 , SAE Technical Paper
- Buchdid D. et al, 2006 “Proposta de Sistema Alternativo de Partida a Frio de Veículos Bi-Combustíveis” SAE 2006-01-2574 , Technical Paper
- Ilinca, F. Pelletier, D. Garon, A. 1997 An adaptive finite element method for a two-equation turbulence model in wall-bounded flows International Journal Numerical Methods in Fluids vol. 24 101 120
- Launder, B. E. Sharma, B. I. 1974 “Application of the Energy Dissipation Model of Turbulence to the Calculation of Flow Near a Spinning Disc” Letters in Heat and Mass Transfer v. 1 131 138
- Launder, B.E. Spalding, D.B. 1974 “The numerical computation of turbulent flows” Computer Methods in Appplied Mechanics and Enginnering v. 3 269 289