This paper provides an abnormal sound test analysis method based on the analysis of the crank angle,by experimental study on a car which appeared “dada” sound on idle condition. By means of crankshaft angle signal analysis, the characteristic frequencies of the abnormal sound are corresponded to the working period of the engine, and the frequency and delay characteristics of the abnormal sound in the process of structural transmission are studied. Combined with the adjustment of calibration parameters and the analysis of bench test, found that the main source of the abnormal sound is the knock between the intake camshaft and the bearing support. By optimizing the cam profile and changing the valve clearance, the abnormal sound frequency range noise level is improved by about 7 dB, and the abnormal sound in the car is basically disappears.


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    Title :

    Experimental Study on the Vehicle Knocking Noise Based on Crankshaft Angle


    Additional title:

    Lect. Notes Electrical Eng.


    Contributors:
    Fan, Fugui (author) / Yang, Guofang (author) / Cao, Yuhuang (author) / Song, Zhenghua (author) / Zhang, Jiandong (author) / Liu, Hao (author) / Jing, Haihong (author) / Wang, Yi (author) / Yang, Lei (author) / Cai, Taoting (author)


    Publication date :

    2022-01-13


    Size :

    16 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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