S.P.I식 내연기관의 흡기관내 연료 거동에 관한 연구 = A Study on the Fuel Behavior in the Intake Manifold of Internal Combustion Engine with S.P.I

다국어 초록 (Multilingual Abstract)

This paper is an experimental study on the fuel spray behavior in the intake manifold of internal combustion engine with S.P.I.. For the Improvement of spray behavior in the intake manifold, a twin fluid type atomzer is considered as S.P.I. injector in stead of pressure type injector. On the basis of the experimental results about the mechanism of a spray transport and liquid film flow rates on intake manifold wall, conlusions are as follows : (1) Liquid film flow rates are influenced by throttle valve openning angle and spray droplet size. (2) Maximum local droplet deposit rate is the second region which is the near the intersaction point of the spray angle and the inner wall surface, liquid deposit rate of the second region is over 60% of the total liquid film flow rates. (3) In the case of the small openning angle of the throttle valve, large liquid film recirculation flow are occured in the just back and lower part of throttle valve, it seems to be kind of different droplet mass flux according to the cross section of the intake manifold, finally it seems to be a poor effect on the engine performance. (4) The main reasion of droplet deposite to the inner walls are not only the droplet eddy difusivity, but also momentum of spary droplet issued from injector.