某轻型客车加速工况进气噪声品质优化研究  

Research on the Optimization of Intake Noise Quality of A Light Bus in Acceleration

作　　者：罗文 钟秤平 陈清爽 林圣镇 陈慈龙 Luo Wen;Zhong Chengping;Chen Qingshuang;Lin Shengzhen;Chen Cilong(Jiangling Auto Co.,Ltd.,Nanchang 330001;Jiangxi Vehicle Noise and Vibration Key Laboratory,Nanchang 330001)

机构地区：[1]江铃汽车股份有限公司,南昌330001 [2]江西省汽车噪声与振动重点实验室,南昌330001

出　　处：《汽车工程师》2025年第1期20-25,共6页Automotive Engineer

基　　金：江西省南昌市重大科技攻关项目(洪科字[2023]137号)。

摘　　要：针对某轻型客车发动机转速2 000~3 000 r/min范围内加速过程中存在类似“咆哮”声的异响问题,首先,采用滤波和主观评价相结合的方法确认异响的主要来源为发动机7~21阶次辐射噪声;然后,基于“源-路径-响应”模型,在台架上利用发动机倒拖方法分析可知,噪声产生的主要原因为发动机气缸活塞往复运动吸、排气过程产生的压力脉动,并采用声源覆盖法等方式识别出噪声辐射来自中冷器出气管。最后,通过优化中冷器出气管结构提高管壁的隔声能力,验证结果表明,问题发动机转速区间加速过程车内清晰度指数平均提高了5百分点,声品质得到明显改善。In response to the problem of“roaring”abnormal noise in acceleration of a light bus from 2000~3000 r/min,a combination of filtering and subjective evaluation is used to confirm that the main source of the noise is the engine’s 7th to 21st order radiation noise at first.Then,based on the“source-path-response”model,the engine reverse towing method is used on the test bench to analyze that the noise is mainly generated by pressure pulsation of the engine cylinder piston in the reciprocating suction and exhaust phase,and technical means such as sound source coverage method are used to identify that the noise radiation emitting from the intercooler outlet pipe.Finally,by optimizing the intercooler outlet pipe’s structure,the pipe wall’s sound insulation is improved.The verification results show that the average articulation index in the problematic area of the vehicle is increased by 5 percentage points,and the sound quality is significantly improved.

关 键 词：声品质 清晰度指数 进气系统 中冷器出气管 辐射噪声 

分 类 号：TH534[机械工程]