控制策略对发动机振动噪声水平影响的研究  

The Influence of Control Strategy on Engine Vibration Noise

作　　者：林学东[1] 袁方恩[1] 黄丫[1] 崔磊[1] 沈小东[1] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,吉林长春130025

出　　处：《车用发动机》2011年第1期49-51,共3页Vehicle Engine

摘　　要：4行程发动机曲轴振动是其主要振动噪声源,对于多点电控喷射系统,各缸不均匀性的控制策略直接影响曲轴转速的波动。为此对A,B两台样机在采用S型和D型两种不同控制系统时的整机噪声进行了对比试验分析。结果表明,S型和D型系统对各缸不均匀性控制策略的不同造成样机噪声水平不同,样机A振动噪声较大的主要原因不仅在于其整机结构的频响特性上,而且其控制策略也是影响其振动噪声的不可忽略的因素。The crankshaft vibration was the main source of vibration noise for a 4-stroke engine.For the multi-point injection system,the control strategy of working variance between cylinders directly affected the fluctuation of crankshaft speed.Accordingly,the influences of S-type and D-type control systems,which had different control strategies and were separately mounted to A and B engine,on engine overall noise were compared by the experiment.The results show that the noises produced by S-type and D-type control systems are different.The noise of A engine is larger.The larger vibration noise is not only related to engine frequency characteristics,but control strategy is also a factor that cannot be neglected.

关 键 词：电控燃油喷射系统 振动 噪声 控制策略 

分 类 号：TK411.6[动力工程及工程热物理—动力机械及工程]