This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Fabrication and Characterization of Micro-Orifices for Diesel Fuel Injectors
- Ronald Schaefer - National Vehicle and Fuel Emissions Laboratory, U.S. EPA ,
- Fakhri Hamady - National Vehicle and Fuel Emissions Laboratory, U.S. EPA ,
- George Fenske - Argonne National Laboratory ,
- John Woodford - Argonne National Laboratory ,
- Jin Wang - Argonne National Laboratory ,
- Essam El-Hannouny - Argonne National Laboratory
ISSN: 1946-3952, e-ISSN: 1946-3960
Published June 23, 2008 by SAE International in United States
Citation: Fenske, G., Woodford, J., Wang, J., El-Hannouny, E. et al., "Fabrication and Characterization of Micro-Orifices for Diesel Fuel Injectors," SAE Int. J. Fuels Lubr. 1(1):910-919, 2009, https://doi.org/10.4271/2008-01-1595.
Stringent emission standards are driving the development of diesel-fuel injection concepts to mitigate in-cylinder formation of particulates. While research has demonstrated significant reduction in particulate formation using micro-orifice technology, implementation requires development of industrial processes to fabricate micro-orifices with diameters as low as 50 μm and with large length-to-diameter ratios. This paper reviews the different processes being pursued to fabricate micro-orifices and the advanced techniques applied to characterize the performance of micro-orifices. The latter include the use of phase-contrast x-ray imaging of electroless nickel-plated micro-orifices and laser imaging of fuel sprays at elevated pressures. The experimental results demonstrate an industrially viable process to create small uniform orifices that improve spray formation for fuel injection.