Study of Noise Source Identification and Noise Control of A Gasoline Engine

In this paper, in order to reduce noise radiation of a gasoline engine, firstly, the noise source of this engine was identified by the technique of sound intensity. With the measurement of average sound pressure level and sound power level, the noise reduction result of the oil pan made by sandwich steel plate was proved. This research shows that the oil pan, pulley, intake and cylinder head cover are the main noise resources, and using sandwich steel plate oil pan makes the good noise reduction result . More methods of reducing noise of this engine were devised.