구동방식이 다른 서보유압형 인젝터의 분사응답성 연구

• Published in: 한국분무공학회지 Vol. 18; no. 2; pp. 87 - 93
• Main Authors: 권지원, J. W Kwon, 정명철, M. C Jeong, 이진욱, J. W Lee
• Format: Journal Article
• Language: Korean
• Published: 한국분무공학회 30.06.2013; 한국액체미립화학회
• Subjects: CRDi; High speed camera; Servo Hydraulic Injector; Spray velocity; Spray visualization; 고속 카메라; 기계공학; 분무 가시화; 분무 속도; 서보 유압 인젝터; 커먼레일 직접분사
• ISSN: 1226-2277; 2288-9051

In this paper, high-pressure injection chatacteristics 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-dricen injector. In particulat. The needle response time for start of injection in piezo-dricen injector was faster of about 125 μs than that of solenoid-driven injector. Consequently, it is known that the piezo-driven injector has more degress of freedom in controllong the fuel injection with the high pressure than solenoid-driven injector.