동력기계공학회지 (Journal of Power System Engineering)
- 제12권5호
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- Pages.14-19
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- 2008
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- 2713-8429(pISSN)
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- 2713-8437(eISSN)
커먼레일 디젤기관용 피에조 인젝터 그룹홀 노즐의 분무 특성에 관한 실험적 연구
Experimental Study on Spray Characteristics of Piezo Injector Group-hole Nozzle for Common Rail Diesel Engine
초록
In order to meet stringent future emission regulations, especially to reduce Particulate Matter (PM) and NOX, stoichiometric diesel combustion technology with a piezo group-hole nozzle injector is being researched for reduction harmful emissions. A new nozzle layout, namely a group-hole nozzle, which has one group of small orifices with a wide spray included angle was investigated to improve the efficiency of stoichiometric diesel combustion. From this point of view, the group-hole nozzle suggested by Dense Co. is an attractive candidate method applicable to stoichiometric diesel combustion. The group-hole nozzle concept is to reduce the injector nozzle hole diameters without sacrificing spray penetration by closely locating two holes. Experimental studies have proven that the spray from group-hole nozzles have similar spray penetration to that of a single hole with equivalent overall nozzle hole area, but the spray drop sizes (SMD) are reduced, aiding vaporization and mixing.
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