3개 구동방식(SI, PI, DPI)별 디젤HEV용 인젝터의 분무 특성 비교

• Published in: 한국분무공학회지 Vol. 19; no. 1; pp. 9 - 14
• Main Authors: M C Chung, G S Sung, S M Kim, J W Lee
• Format: Journal Article
• Language: Korean
• Published: 한국분무공학회 30.03.2014; 한국액체미립화학회
• Subjects: Direct needle-driven piezo injector; Hydraulic-servo injector; Piezo-driven injector; Solenoid-driven injector; Spray visualization; 기계공학; 분무 가시화; 솔레노이드 인젝터; 유압서보 인젝터; 직접 니들구동 피에조 인젝터; 피에조 인젝터
• ISSN: 1226-2277; 2288-9051

Performance of DI diesel engine with high-pressure fuel injection equipment is directly related to its emission characteristics and fuel consumption. So, the electro-hydraulic injector for the common-rail injection system should be designed to meet the precise high fuel delivery control capability. Currently, most high pressure injector in use has a needle driven by the solenoid coil energy or the piezo actuator controlled by charge-discharge of output pulse current. In this study, macroscopic spray approaching method was applied under constant volume chamber to research the performance of three different injectors : solenoid, indirect-acting piezo and direct-acting piezo type for CR direct-injection. LED back illumination for Mie scattering was applied on the liquid spray visible of direct-acting piezo injector, including hydraulic-servo type solenoid and piezo-driven injectors. As main results, we found that a direct-acting piezo injector had better a spray tip penetration than hydraulic-servo injectors in spray visualization.