Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Comparison Analysis of Dynamic Characteristics of Servo-hydraulic Piezo-driven Injector between 3-way and Bypass-circuit Type

3-way형과 Bypass형 서보유압 피에조 인젝터의 구동특성 비교

  • Jo, Insu (Department of Mechanical Engineering, Graduate School, Soongsil University) ;
  • Jeong, Myoungchul (Department of Mechanical Engineering, Graduate School, Soongsil University) ;
  • Lee, Jinwook (Department of Mechanical Engineering, Soongsil University)
  • 조인수 (숭실대학교 대학원 기계공학과) ;
  • 정명철 (숭실대학교 대학원 기계공학과) ;
  • 이진욱 (숭실대학교 기계공학과)
  • Received : 2013.01.28
  • Accepted : 2013.02.07
  • Published : 2013.09.01
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Abstract

CRDi technology of diesel engine was developed from in the early 2000s due to a need to increase fuel efficiency and environment care. Especially, high-pressure fuel injection system in CRDi system which has a fuel injection unit including an injector, a fuel pump and common-rail, etc. becomes possible to make the exhaust gas clean as well as power improvement. In this study, comparison of dynamic characteristics of servo-hydraulic piezo-driven injector with 3-way and bypass-circuit type was analyzed by using the AMESim code. As results of this study, it found the bypass-circuit inside servo-hydraulic piezo injector can cause a faster injection response than that of the 3-way type. Also it was shown that bypass-circuit type had better control capability due to hydraulic bypass system.

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References

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