1D Simulation of Exhaust Noise Reduction Effect by Changing Internal Structure of Motorcycle Muffler

Abstract

In this study, one-dimensional simulation was used in this study for internal combustion engines to analyze the exhaust pressure of the mufflers and calculated the exhaust noise from the results of the exhaust pressure at the muffler outlet． The effect of reducing exhaust noise was investigated by changing the internal structure of motorcycle mufflers and compared the differences in exhaust noise between experiments and simulations． As a result, the differences in exhaust noise between original and modified mufflers at stationary noise and constant speed tests were possible to be reproduced even in a one-dimensional simulation if the internal structure was major changed．