This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Electrospray for Fuel Injection
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1997 by SAE International in United States
Annotation ability available
Automotive fuel injectors have been adapted with electrodes that enable negative electric charge to be inserted into the fuel flowing through the injector. Because the fuel is electrically very insulating and flowing rapidly, a significant amount of charge is retained in the fuel as it issues from the injector. Once exposed to the atmosphere, the charge laden fuel both atomizes and spatially disperses due to electrostatic forces. By varying the amount of inserted charge, the spray pattern can be varied significantly. This added variability allows the possibility of changing the fuel presentation when fuel is injected into the intake port of a typical spark ignited engine. A variable presentation may be useful for optimizing fuel evaporation within the port, with a corresponding reduction of exhaust emissions, during the cold start period of the engine when those parameters affecting evaporation are changing both temporally and spatially. The present work describes the modification to the injectors with radially oriented electrodes, the electrical characteristics of the charge insertion (several μa at 2-4 kV), and the resulting spray patterns.
CitationHetrick, R. and Parsons, M., "Electrospray for Fuel Injection," SAE Technical Paper 972987, 1997, https://doi.org/10.4271/972987.
- Michelson D Electrostaic Atomization Adam Hilger New York 1990
- Kelly A. J. “Low Charge Density Electrostatic Atomization” IEEE Trans. Ind. Appl. 20 267 1984
- Kelly A. J. “Electrostatic Atomizing Device” 1981
- Tobazeon R. “Prebreakdown Phenomena in Dielectric Liquids” Proceedings of the 1993 IEEE 11 th International Conference on Conduction and Breakdown in Dielectric Liquids 172 183
- Gosse J. P. “Electric Conduction in Dielectric Liquids” The Liquid State and Electrical Properties Plenum Press New York 503 519 1988
- Lehr W. Hiller W. “Electrostatic Atomization of Liquid Hydrocarbons” Journal of Electrostatics 30 433 1993
- Zhao Fu-Quan Lai Ming-Chia Harrington D. L. “The Spray Characteristics of Automotive Port Fuel Injection--A Critical Review” SAE Technical Paper, No. 950506 1995
- Kelly A. J. “Charge Injection Atomizer Modeling” Aerosol Sci and Tech 12 526 1990
- Secker P. E. Hughes J. F. “Liquid-filled Electrohydrodynamic High Voltage Generator” Proc. IEE 116 1785 1969
- Kelly A. J. “Electrostatic Injector Using Vapor and Mist Insulation” 1991