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바이패스 방식 피에조 인젝터의 피에조 적층 및 인가전압에 따른 연료분사 특성 연구A Study on Injection Characteristics of Piezo Injector with Bypass by Various Piezo Stack and Applied Voltage
- Other Titles
- A Study on Injection Characteristics of Piezo Injector with Bypass by Various Piezo Stack and Applied Voltage
- Issue Date
- Mar-2020
- Publisher
- 한국분무공학회
- Keywords
- AMESim simulation code(AMESim 해석 코드); Piezo stack(피에조 스택); Inverse piezo-electric effect (역압전효과); Fuel temperature(연료 온도)
- Citation
- 한국분무공학회지, v.25, no.1, pp.1 - 7
- Journal Title
- 한국분무공학회지
- Volume
- 25
- Number
- 1
- Start Page
- 1
- End Page
- 7
- ISSN
- 1226-2277
- 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 highpressure 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.
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Related Researcher
- Lee, Jin wook
- College of Engineering (School of Mechanical Engineering)