구동방식이 다른 서보유압형 인젝터의 분사응답성 연구Study on Injection Response of Servo-Hydraulic Injector with Different Actuation Method
- Other Titles
- Study on Injection Response of Servo-Hydraulic Injector with Different Actuation Method
- Authors
- 권지원; 정명철; 이진욱
- Issue Date
- Jun-2013
- Publisher
- 한국액체미립화학회
- Keywords
- Servo Hydraulic Injector; CRDi; High speed camera; Spray visualization; Spray velocity; 서보 유압 인젝터; 커먼레일 직접분사; 고속 카메라; 분무 가시화; 분무 속도
- Citation
- 한국액체미립화 학회지, v.18, no.2, pp.87 - 93
- Journal Title
- 한국액체미립화 학회지
- Volume
- 18
- Number
- 2
- Start Page
- 87
- End Page
- 93
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/12040
- ISSN
- 1226-2277
- 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 μs 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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