At idle speed,the speed of the automobile engine is low,and large vibration will be gen-erated 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 con-trol 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.
idle operating conditionsenginebox caradaptive filtering algorithmnoise control
维普
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