Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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1D Computer Simulation of Diesel Engine Intake Port Swirl Ratios Considering the Fuel Injection Timing Range

디젤 엔진 연료 분사 타이밍 구간에서의 흡기 포트 스월비 1D 컴퓨터 시뮬레이션

  • 오대산 (국방기술품질원 기동화력센터) ;
  • 이충훈 (서울과학기술대학교 기계자동차공학과)
  • Received : 2021.05.18
  • Accepted : 2021.06.14
  • Published : 2021.06.30
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Abstract

This study was performed to calculate the swirl ratio of a diesel engine intake port by a 1D computer simulation under actual engine operating conditions. The swirl ratio of the intake port was simulated according to the change of the engine speed during the operation of the motoring without fuel injection. The swirl ratio of the intake port was simulated according to changes in the crank angle during the four-cycle operation of intake, compression, expansion and exhaust. The swirl ratio represented by the three regions of the piston, center and squish was simulated. Among the three regions, the piston-region swirl ratio is important for effective air-fuel mixing in the engine cylinder. In particular, it was confirmed during the simulation that the piston swirl ratio before and after the compression top dead center (TDC) point when fuel is injected in the DI diesel engine can have a significant effect on the mixing of air and fuel. It was desirable to set the average piston swirl ratio over a crank angle section before and after compression TDC as the representative swirl ratio of the cylinder head intake port according to the change of the engine speed.

Keywords

References

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