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직접 니들구동 피에조 인젝터의 3개 설계인자별 분무특성 연구
한상익 ( Han Sangik ),김주환 ( Kim Juhwan ),지형순 ( Ji Hyungsun ),고준채 ( Go Junchae ),김진수 ( Kim Jinsu ),이진욱 ( Jinwook Lee ) 한국액체미립화학회 2016 한국액체미립화학회 학술강연회 논문집 Vol.2016 No.-
The advantages of the common rail fuel injection system have changed the market of diesel vehicle since the development of the diesel engine. This system suggests that a high-pressure pump supply diesel fuel at high pressure up to and above 2000bar to common-rail reservoir. And it makes possible high pressure injection which provides better fuel atomization by solenoid or piezoelectric valves. In this study, the direct needle-driven piezo injector was investigated for achieving injection pressure of 1800bar by optimal design through simplification of inside component and changing number of springs and plates of DPI (Direct needle-driven Piezo Injector). A DPI operation method is shown in Fig. 1 and when the piezo stack is discharged, the displacement of the stack is altered. Then the fuel injection is started through the nozzle hole by moving the needle that was blocking the hole of the nozzle. What start of injection is occurred when a current is discharged is opposed to the general method of the convention piezo injector.
분사압력 1800 bar 실현을 위한 직접 니들구동방식 피에조 인젝터 설계 최적화 연구
한상익 ( Han Sangik ),김주환 ( Kim Juhwan ),지형순 ( Ji Hyungsun ),고준채 ( Go Junchae ),김진수 ( Kim Jinsu ),이진욱 ( Jinwook Lee ) 한국액체미립화학회 2016 한국액체미립화학회지 Vol.21 No.3
The advantages of the common rail fuel injection system architecture have been recognized since the development of the diesel engine. In common rail systems, a high-pressure pump stores a reservoir of fuel at high pressure up to and above 2000 bar. And solenoid or piezoelectric valves make possible fine electronic control over the fuel injection time and quantity, and the higher pressure that the common rail technology makes available provides better fuel atomization. In this study, the direct needle-driven piezo injector was investigated for accomplishing injection pressure of 1800 bar by optimal design by simplification of component and changing number of springs and plates of DPI. It was found that a direct needle-driven piezo injection system features the prototype DPI for passenger vehicle to operate at 1800 bar of injection pressure.