텀블강화형 밸브에 의한 흡기포트 및 실린더내의 유동 특성에 관한 연구

Gas flow field within the cylinder which is called a tumble flow is important factor in improving lean combustion stability. In this study, steady state flow tests were performed t.o quantify tumble ratio of flowfields generated by a tumble intensifying valveCTIV). In addition, velocity and fluctuation profiles in an intake port and flow fields in the cylinder were inspected using a hotwire ane. mometer and a laser light sheet method with various TIV configurations. These experimetal results show that installated TIV has a great effect on flow field distribution in an intake port and these effects enhance a tumble flow in the cylinder.