怠速工况下厢式汽车发动机噪声控制方法研究  

Research on noise control methods for box car engines under idle operating conditions

作　　者：杨杰 YANG Jie(School of Automotive Engineering,Shanghai Communications Polytechnic,Shanghai 200431,China)

机构地区：[1]上海交通职业技术学院汽车工程学院,上海200431

出　　处：《工业仪表与自动化装置》2024年第5期108-112,128,共6页Industrial Instrumentation & Automation

摘　　要：在怠速状态下,汽车发动机的转速较低,会因气缸内压力脉动和失火震动等原因产生较大震动,导致噪声增加,而持续的震动和噪声会对发动机内部零部件产生额外的压力和振动,加速零部件的磨损,降低发动机的使用寿命。对此,提出怠速工况下厢式汽车发动机噪声控制方法。首先,在厢式汽车怠速工况下,利用声强法识别发动机噪声源。然后,在噪源处通过转速传感器测量怠速工况下厢式汽车发动机噪声源处的转速值,并将其转化为参考信号。最后,将转速参考信号输入至基于自适应滤波算法设计的滤波器中,以此实现怠速工况下厢式汽车发动机噪声控制。实验结果表明,所提方法的怠速工况下厢式汽车发动机噪声控制精度更高、效果更好、更适用于实际应用。At idle speed,the speed of the automobile engine is low,and large vibration will be generated due to pressure pulsation in the cylinder and misfire vibration,resulting in increased noise,while continuous vibration and noise will generate additional pressure and vibration on the internal parts of the engine,accelerate the wear of parts,and reduce the service life of the engine.Therefore,the noise control method of van engine under idle condition is proposed.Firstly,the engine noise source is identified by the sound intensity method under the idling condition of the van.Then,at the noise source,the speed of the van engine at the noise source is measured by the speed sensor under the idle condition,and it is converted into a reference signal.Finally,the speed reference signal is input into the filter designed based on the adaptive filtering algorithm,so as to realize the noise control of the van engine under idle condition.The experimental results show that the proposed method has higher accuracy,better effect and is more suitable for practical application.

关 键 词：怠速工况 发动机 厢式汽车 自适应滤波算法 噪声控制 

分 类 号：U467[机械工程—车辆工程]