Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Study on Injection Response of Servo-Hydraulic Injector with Different Actuation Method

구동방식이 다른 서보유압형 인젝터의 분사응답성 연구

  • 권지원 (숭실대학교 대학원 기계공학과) ;
  • 정명철 (숭실대학교 대학원 기계공학과) ;
  • 이진욱 (숭실대학교 기계공학과)
  • Received : 2013.02.12
  • Accepted : 2013.04.18
  • Published : 2013.06.30
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Abstract

In this paper, high-pressure injection characteristic of servo hydraulic injector as the key component of diesel CRDi system, which is driven by solenoid and piezo-actuator were examined by experimental analysis. High-pressure injection characteristic of standard diesel fuel injected at high pressure up to 160 MPa was investigated at high-pressure chamber by using a high-speed camera for spray visualization and quantitative analysis. By this study, we found that the piezo-driven injector has better performances in controlling the fuel injection with the high pressure, including fuel quantity, spray penetration length and spray velocity, than that of a solenoid-driven injector. In particular, the needle response time for start of injection in piezo-driven injector was faster of about $125{\mu}s$ than that of solenoid-driven injector. Consequently, it is known that the piezo-driven injector has more degrees of freedom in controlling the fuel injection with the high pressure than solenoid-driven injector.

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References

  1. J. W. Lee, G. B. Cho, H. S. Kim, Y. I. Jeong, "A Study on PM Regeneration Characteristics of Diesel Passenger Vehicle with Passive Regeneration DPF System", Transactions of KSAE, Vol. 31, No. 2, pp. 88-194, 2007.
  2. Akira Kato, Katsuya Matsuura, Takazo Hakozaki, Osamu Suzuki, Shigenori Haraguchi, Yasuhiro Yoshimi, Takahiro Katano and Tomoyuki Hashimoto, "Influence of a Fast Injection Rate Common Rail Injector for the Spray and Combustion Characteristics of Diesel Engine", SAE Paper No. 2011-01-0687, 2011.
  3. Rickard Ehleskog, Valeri Golovitchev, Ingemar Denbratt and Sven Andersson, Carlo Alberto Rinaldini., "Experimental and Numerical Investigation of Split Injections at Low Load in an HDDI Diesel Engine Equipped with a Piezo Injector", SAE Paper No. 2006-01-3433, 2006.
  4. Catania A.E., d'Ambrosio S., Ferrari A., Finesso R., Spessa E., Avolio G., Rampino V, "Experimental Analysis of Combustion Processes and Emissions in a 2.0L Multi-Cylinder Diesel Engine Featuring a New Generation Piezo-Driven Injector", SAE Paper No. 2009-24-0040, 2009.
  5. C. H. Kim, Automobile of Diesel Engine, pp. 143- 147 GoldenBell, 2009.
  6. Y. I. Jeong, J. W. Lee, G. B. Cho, and H. S. Kim, 2010, Automotive & Environment, Soongsil University, pp.107-112, pp. 239-242, 2010.
  7. Jinwook, Lee, "A Study on Driving Performance, Spray Characteristics and Cavitation Flow of a Piezo-driven Diesel Injector", Ph. D. Dissertation, Seoul National University, 2005.
  8. J. W. Lee, J. H. Lee, M. S. Kim, "Analysis of Hydraulic Characteristics of Two Solenoid-driven Injectors for CRDi System", Transactions of KSAE, Vol. 19, No. 6, pp. 140-147, 2011.
  9. A. Arpaia, A. E. Catania, A. Ferrari and E. Spessa. "Development and Application of an Advanced Numerical Model for CR Piezo Indirect Acting Injection Systems", SAE Paper No. 2010-01-1503, 2010.