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1-D Model to Estimate Injection Rate for Diesel Injector using AMESim

디젤 인젝터 분사율 예측을 위한 AMESim 기반 1-D 모델 구축

  • 이진우 (울산과학대학교 기계공학부) ;
  • 김재헌 (현대자동차 남양연구소) ;
  • 김기현 (신라대학교 융합기계공학부) ;
  • 문석수 (인하대학교 기계공학과) ;
  • 강진석 (현대자동차 남양연구소) ;
  • 한상욱 (한국자동차연구원 제조기술연구센터)
  • Received : 2020.02.17
  • Accepted : 2020.03.06
  • Published : 2020.03.30

Abstract

Recently, 1-D model-based engine development using virtual engine system is getting more attention than experimental-based engine development due to the advantages in time and cost. Injection rate profile is the one of the main parameters that determine the start and end of combustion. Therefore, it is essential to set up a sophisticated model to accurately predict the injection rate as starting point of virtual engine system. In this research, procedure of 1-D model setup based on AMESim is introduced to predict the dynamic behavior and injection rate of diesel injector. As a first step, detailed 3D cross-sectional drawing of the injector was achieved, which can be done with help of precision measurement system. Then an approximate AMESim model was provided based on the 3D drawing, which is composed of three part such as solenoid part, control chamber part and needle and nozzle orifice part. However, validation results in terms of total injection quantity showed some errors over the acceptable level. Therefore, experimental work including needle movement visualization, solenoid part analysis and flow characteristics of injector part was performed together to provide more accuracy of 1-D model. Finally, 1-D model with the accuracy of less than 10% of error compared with experimental result in terms of injection quantity and injection rate shape under normal temperature and single injection condition was established. Further work considering fuel temperature and multiple injection will be performed.

Keywords

References

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