한국분무공학회지 (Journal of ILASS-Korea)

  • 제28권4호
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  • Pages.169-175
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  • 2023
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  • 1226-2277(pISSN)
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  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
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1D 시뮬레이션 기반 GDI 인젝터의 비선형적 분사 특성 해석에 대한 연구

Investigation on the Non-linear Injection Characteristics of GDI injector using 1D Simulation

  • 이진우 (울산과학대학교 기계공학부) ;
  • 문석수 (인하대학교 기계공학과) ;
  • 허동한 (현대자동차 eP Drivetrain Test Team 3) ;
  • 강진석 (현대자동차 eP Drivetrain Test Team 3)
  • 투고 : 2023.09.11
  • 심사 : 2023.10.26
  • 발행 : 2023.12.31
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초록

Multi-injection scheme is being applied to GDI combustion to reduce PM and PN emission to meet the EU7 regulation. However, very short injection duration encounters the ballistic injection region, which injection quantity does not increase linearly with injection duration when applying multi-injection. In this study, numerical studies were conducted to reveal the cause of ballistic injection and the effect of design parameters on ballistic region using 1-D simulation, AMESim. Injection rate and injection quantity were compared with experiment to validate the established model, which showed the accuracy with 10% error. The model revealed that the tendency of ballistic region coincides with the needle motion behavior, which means that parameters at the upper part of needle such as electro-magnetic force, needle spring force and needle friction force have dominant effect on ballistic injection. To figure out the effect of electro-magnetic and needle friction force on ballistic, those parameters were varied to plus and minus 10% with model. The result showed that those parameters clearly changed the ballistic region characteristics, however, the impact became insignificant for outside of ballistic region, which means that the ballistic injection is mainly influenced by initial motion of injector needle.

키워드

과제정보

본 논문은 울산과학대학교 교내연구과제로 수행되었음(과제번호: 202310029).

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