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[가솔린엔진] 밸브벽면과 제트의 부착효과로 인한 질량유량 감소에 관한 연구
이준서(J.S. Lee),김명균(M.K. Kim),차경옥(K.O. Cha) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Flow characteristics of a compressible gas flow through a rotating disc-type rotary valve are investigated experimentally under various conditions. It is known that the mass flow rate through poppet valves of 4-stroke cycle engines and through piston valves of 2-stroke cycle engines decrease with increase in engine speed. Rotary valve is one means by which air may be made to flow intermittently through a pipe. In this paper an exhaust system simulator of engine was used to experimentally analyze the decrease in flow rate at high rotation speeds and to determine what variables. other than rotational speed. give rise to the observed behaviour. These variables have been included in an empirical equation which is representative of the measured flow characteristics.