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CRDi용 고압 인젝터의 구동방식별 동적거동 특성 해석
이중협(Junghyup Lee),조인수(Insu Jo),이진욱(Jinwook Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In this study, a piezo-driven injector, as a new method driven by piezoelectric energy, has been designed and investigated based on the concept of inverse piezo-electric effect to overcome the major drawbacks of conventional solenoid-driven injector. Specially, it is investigated the dynamic characteristics of Diesel injectors with different driving type for the common rail direct injection by using the AMESim environment. As this research results, we found that the input voltage exerted on piezo stack is the dominant factor and the piezo-driven injector has better performances in controlling the fuel injection with the high pressure than that of a solenoid-driven injector.
CRDi용 서보 유압 인젝터의 구동방식별 분무 특성에 관한 연구
이중협(Junghyup Lee),권지원(Jiwon Kwon),정명철(Myungchul Chung),성기수(Gisu Sung),이진욱(Jinwook Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper is experimental research about the spray characteristics of servo hydraulic injector. The aim of this paper was compared the spray characteristics between solenoid-driven injector and piezo-driven injector. Specially, the spray characteristics were investigated about same conditions of fuel injection duration and pressure using the common-rail system and high speed camera and LED lamp. Also, fuel quantity was measured by high precision electronic scale. As some research results, we found that under the same conditions, fuel injection quantity and needle response time in piezo-driven injector have improved as compared to solenoid-driven injector.
2개 솔레노이드 구동방식별 CRDi용 인젝터의 유압 동특성 해석
이진욱(Jinwook Lee),이중협(Junghyup Lee),김민식(Minsik Kim) 한국자동차공학회 2011 한국 자동차공학회논문집 Vol.19 No.6
The injection nozzle of an electro-hydraulic injector for the common rail Diesel fuel injection system is being opened and closed by movement of a injector’'s needle which is balanced by pressure at the nozzle seat and at the needle control chamber, at the opposite end of the needle. In this study, the slenoid actuator was considered as a prime movers in high pressure Diesel injector. Namely a solenoid-driven Diesel injector with different driving current types, as a general method driven by solenoid coil energy, has been applied with a purpose to develop the analysis model of the solenoid actuator to predict the dynamics characteristics of the hydraulic component (injector) by using the AMESim code. Aimed at simulating the hydraulic behavior of the solenoid-driven injector, the circuit model has been developed as a unified approach to mechanical modeling in this study. As this analytic results, we know the suction force and first order time lag for driving force can be endowed in solenoid-driven injector in controlling the injection rate. Also it can predict that the input current wave exerted on solenoid coil is the dominant factor which affects on the initial needle behavior of solenoid-driven injector than the hydraulic force generated by the constant injection pressure.
조인수(Insu Jo),이중협(Junghyup Lee),이진욱(Jinwook Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The performance of Diesel injector is directly related to the power and emission performance and fuel consumption in a Diesel engine. In this study, it was investigated the dynamic characteristics of Diesel injectors with different driving type for the common rail direct injection by using the AMESim simulation code. The analysis parameter defined such as fuel pressure, injection hole"s diameter and driven voltage. As the results, it was shown that the piezo-driven injector had a faster response and had better control capability than the solenoid-driven injector. It was found the piezo-driven can be utilized effectively as multiple injection than solenoid-driven injector.
고압 연료분사용 피에조 액츄에이터 모델링 및 유압 동특성 해석
김민식(Minsik Kim),이광성(Gwangseog Lee),이중협(Junghyup Lee),이진욱(Jinwook Lee),유호선(Hoseon Yoo),김문헌(Munheon Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this study, a piezo-driven injector, as a new method driven by piezoelectric energy, has been designed and investigated based on the concept of inverse piezo-electric effect to overcome the major drawbacks of conventional solenoid-driven injector. So it has been applied with a purpose to develop the analysis model of the piezo actuator to predict the dynamics characteristics of the hydraulic component(injector) by using the AMESim code. Aimed at simulating the hydraulic behavior of the piezo-driven injector, the circuit model has been developed and verified by comparison with the experimental results. The effects of an electric control between the solenoid valve and piezo-ceramic stack for injector needle’s driving on the dynamic characteristics were usually investigated. As this research results, we found that the input voltage exerted on piezo stack is the dominant factor and the piezo-driven injector has more degrees of freedom in controlling the fuel injection with the high pressure than a solenoid-driven injector.