Design , Construction and Evaluation of Exhaust Silencer for 399 Massey Ferguson Tractor
Subject Areas :
Keywords: Silencer, Reduce engine noise, exhaust, Exhaust sound,
Abstract :
An exhaust system delivers burned gases from combustion chambers of an engine to the atmosphere while reducing the engine noise at silencer of outlet pipe. Gases leave the vehicle through the pipe. In this research an exhaust silencer has been desgined and constructed for the MF399 Tractor which was tested and evaluated. Exhaust system of an engine consist of: exhaust manifold, exhaust pipe, silencer, and diffusion pipe. Silencer is used to reduce external gas velocity and so engine noise. Silencer is desgined in such away that the outgoing gases from the engine slowly expand inside it, and also heat energy sufficiently. Design of silencer has considerable effect on elimination of back-pressuer and abnormal noises. Rock wool which is an acoustic insulator and sound reducer is used in design ment an construction of this silencer. Tests and evaluation of the silencer indicated that out coming sound pressur level can be reduced as much as 15 dB(A) as compared to exiting standard model of silencer for MF 399 Tractor.
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