SI-engine design concept for reducing cyclic variations

Ken Naitoh*, Yuji Kaneko, Kazuya Iwata

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Fluid-dynamic principle for obtaining relatively stable combustion is found by performing cycle-resolved computations of turbulent flows in engines. Cycle-resolved computations are performed by using the implicit large eddy simulation (ILES) code, which we have proposed earlier. Calculations over continuous cycles show us the existence of "silent domain" in the engine cylinder, having weak cyclic-variations of flow. Time-dependent velocities averaged over six cycles, mean velocities, are also small in the silent domain. Moreover, we examine further on why cyclic variations of flow is weaker in the silent domain. This brings us a way for controlling cyclic variations for several engines.

Original languageEnglish
JournalSAE Technical Papers
Publication statusPublished - 2005
Externally publishedYes
Event2005 SAE World Congress - Detroit, MI, United States
Duration: 2005 Apr 112005 Apr 14

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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