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이헌균(Heonkyun Lee),이준용(Junyong Lee),허형석(Hyungseok Heo),강융환(Yunghwan Kang),성창원(Changwon Sung),정홍진(Hongjin Jung) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
Corresponding to the regulations with noise fuel consumption, the semi-active muffler applying the exhaust valve is becoming widely used. The exhaust valve is seated on the inside of the muffler for achieving the function of noise reduction and enhanced back pressure. In this paper, the performance of the butterfly type exhaust valve is analyzed by computational fluid dynamic method. The characteristic of the flow pattern and applied hydraulic torque is predicted on the exhaust valve with respect to a opening ratio. Also, the influence on the performance of the various operating condition and design factor has been investigated such as exhaust gas flow rate and temperature.