International Journal of Automotive Technology

, Volume 11, Issue 6, pp 783–791 | Cite as

Effect of the number of fuel injector holes on characteristics of combustion and emissions in a diesel engine

  • B. H. Lee
  • J. H. Song
  • Y. J. Chang
  • C. H. Jeon


The diesel combustion process is highly dependent on fuel injection parameters, and understanding fuel spray development is essential for proper control of the process. One of the critical factors for controlling the rate of mixing of fuel and air is the number of injector holes in a diesel engine. This study was intended to explore the behavior of the formation of spray mixtures, combustion, and emissions as a function of the number of injector hole changes; from this work, we propose an optimal number of holes for superior emissions and engine performance in diesel engine applications. The results show that increasing the number of holes significantly influences evaporation, atomization, and combustion. However, when the number of holes exceeds a certain threshold, there is an adverse effect on combustion and emissions due to a lack of the air entrainment required for the achievement of a stoichiometric mixture.

Key Words

Fuel injector Hole number Spray interaction Combustion Emissions 


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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • B. H. Lee
    • 1
  • J. H. Song
    • 2
  • Y. J. Chang
    • 2
  • C. H. Jeon
    • 2
  1. 1.Department of Mechanical EngineeringPusan National UniversityBusanKorea
  2. 2.School of Mechanical EngineeringPusan National University, Pusan Clean Coal CenterBusanKorea

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