Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Injection Characteristics of Piezo Injector with Bypass by Various Piezo Stack and Applied Voltage

바이패스 방식 피에조 인젝터의 피에조 적층 및 인가전압에 따른 연료분사 특성 연구

  • 조인수 (숭실대학교 대학원 기계공학과) ;
  • 김우택 (숭실대학교 기계공학부) ;
  • 이진욱 (숭실대학교 기계공학부)
  • Received : 2019.10.29
  • Accepted : 2019.12.18
  • Published : 2020.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

In the common rail fuel injection system, which is the core of diesel high efficiency and NOX reduction, injection strategies such as high pressure injection of fuel, accurate injection rate control, and multistage injection are important to increase fuel atomization. In this study, the bypass type piezo injector for the electronic control based common rail injection system applied to diesel fuel vehicle was studied. In particular, the injection rate and internal fuel flow characteristics of the high-pressure injector according to the piezo stacking number and applied voltage were analyzed by theoretical numerical method. When the applied voltage changes, it is determined that additional fuel flow through the bypass compensates for the reduced valve driving force due to the change in the driving voltage.

Keywords

References

  1. 강승우, 홍동우, 배충식, 소형 디젤 엔진의 인젝터노즐 형상에 따른 연소 기간 및 연비 특성. 한국자동차공학회 추계학술대회 및 전시회, 2018, 191-191.
  2. G. Bression, D. Soleri, S. Savy, S. Dehoux, D. Azoulay, H. B. Hamouda, L. Doradoux, N. Guerrassi and N. Lawrence, "A study of methods to lower HC and CO emissions in diesel HCCI," SAE 2008-01-0034, 2008.
  3. j. Schommers, f. Duvinage, M. Stotz, A. Peter, S. Ellwanger, K. Koyanagi and H. Gildein, "Potential of commmon rail ingection system for passenger Car DI diesel engines", SAE paper, No. 2000-01-0944, 2000.
  4. N. Guerrassi and P. Dupraz, "A common rail injection system for high speed direct injection diesel engines", SAE paper, No. 980803, 1988.
  5. 이진우, 배충식, "인가전압이 디젤 피에조 인젝터의 분무 특성에 미치는 영향", Vol. 18, No. 4, pp. 99-106.
  6. "A technical summary of Euro 6/VI vehicle emission standards", ICCT, 2016.
  7. J.-W. Lee and K.-D. Min, "Analysis of macroscopic spray characteristics of diesel injectors with three different needle driving type in common rail direct injection system", Journal of the Korean Society of Marine Engineering, Vol. 30, No. 3, 2006, pp. 351-358.
  8. 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 2010-01-1503, 2010.