3Z1.1型柴油机排气系统的降噪优化设计  

Noise reduction optimization design of 3Z1.1 diesel engine exhaust system

作　　者：吴国荣 WU Guorong(Shanghai New Power Automotive Technology Co.,Ltd.,Shanghai 200438,China)

机构地区：[1]上海新动力汽车科技股份有限公司,上海200438

出　　处：《柴油机设计与制造》2024年第2期45-48,共4页Design and Manufacture of Diesel Engine

摘　　要：为了降低3Z1.1型柴油机的排气噪声,在分析该款柴油机排气噪声频谱特性的前提下,设计了一款新型阻抗复合型消声器,并在该消声器上加入小孔喷注降噪结构。结果表明:该型消声器在宽频范围内具有良好的降噪效果,整机噪声下降29.8 dB,满足预期要求。In order to reduce the exhaust noise of 3Z1.1 diesel engine,a new impedance compound muffler was designed based on a thorough analysis of the exhaust noise spectrum characteristics of the die-sel engine,and a small hole injection noise reduction structure was added on this basis.Results show that this type of muffler has a good noise reduction effect in a wide frequency range,with a decrease of 29.8 dB in overall noise,which meets the expected requirements.

关 键 词：柴油机 排气噪声 消声器 

分 类 号：TK423[动力工程及工程热物理—动力机械及工程]