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Optimization of next generation high flow gasoline direct injection

  • A. BossiEmail author
  • G. Hoffmann
  • J. Shi
Conference paper
Part of the Proceedings book series (PROCEE)

Zusammenfassung

Engine downsizing, using turbocharging in combination with a reduced number of cylinders, increases power density and leads to high injector flow rate requirements. High flow rates, combined with the trend towards increased system pressures, present a particular development challenge for the injector hardware. This paper describes the approach followed to develop a competitive next generation high flow GDi injector. The higher pressure capable injector has been optimized in particular from the magnetic circuit and the flow path point of views. Increased magnetic forces are required to operate under high pressure conditions and reduced internal pressure drops enable optimal performance under high flow conditions. In addition, hydraulic flow passages and interfaces have to be optimized to achieve the required injector dynamics. Finally, the injector nozzle needs particular attention to achieve optimal flow and spray performance in order to enable ultimate combustion efficiency across the pressure range.

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Literatur

  1. 1.
    Befrui, B., Berndorfer, A., Breuer, S., Hoffmann, G., & Piock, W. (2015). Effect of Fuel Pressure on GDi Multi-Hole Injector Particulate Emissions and Tip Coking Robustness.Google Scholar
  2. 2.
    Cheng, Q., Zhang, Z.-D., Guo, H., & Xie, N.-L. (2014). Simulation and analysis on electro-magneticthermal coupling of solenoid GDI injector. International Journal of Applied Electromagnetics and Mechanics. 46. 775-792.  https://doi.org/10.3233/jae-141973.CrossRefGoogle Scholar
  3. 3.
    Hoffmann, G., Befrui, B., Berndorfer, A., & Piock, W. (2014). Fuel System Pressure In-crease for Enhanced Performance of GDi Multi-Hole Injection Systems. SAE Int. J. Engines 7(1):519-527.CrossRefGoogle Scholar
  4. 4.
    Husted, H., Spegar, T., & Spakowski, J. (2014). The Effects of GDi Fuel Pressure on Fuel Economy. SAE Technical Paper 2014-01-1438.Google Scholar
  5. 5.
    Karidis, J., & Turns, S. (1982). Fast-Acting Electromagnetic Actuators –Computer Model Development and Verification. SAE Technical Paper 820202.Google Scholar
  6. 6.
    Kumar, K., Desai, C., & Flinn, M. (1994). A CFD Study of Squeeze Film. SAE Transactions, Vol. 103, Section 2: JOURNAL OF COMMERCIAL VEHICLES (1994), pp. 36-46.Google Scholar
  7. 7.
    Shi, J., Gomez Santos, E., Hoffmann, G., & Dober, G. (2018). Large Eddy Simulation as an Effective Tool for GDi Nozzle Development. MTZ.Google Scholar
  8. 8.
    Spurk, J., Betzel, T., & Simon, N. (1992). Interaction of Nonlinear Dynamics and Unsteady Flow in Fuel Injectors. SAE Transactions , Vol. 101, Section 3: JOURNAL OF EN-GINES, pp. 1141-1148.Google Scholar

Copyright information

© Springer Fachmedien Wiesbaden GmbH, ein Teil von Springer Nature 2019

Authors and Affiliations

  1. 1.DELPHI TechnologiesBascharageLuxemburg

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