As engines and powertrains become quieter, sound quality becomes more important as an indicator of product quality. As a consequence, there is a heightened need to reduce gear noise.The objective of this work was to identify the source and cause of a modulated gear whine. The approach taken to identify the source of the modulation involved running a full powertrain on a spin stand and minimizing the number of meshing gear pairs until the offending pairs were identified. Further experimental testing and analysis models were employed to determine the cause of the modulation. From proximity probe measurements and backed up by the analytical model, it was determined that one of the gear mesh suffered from inadequate bearing support and off-center gear loads. This condition caused a tilt in one of the meshing gears which created a sideband that modulated with the primary meshing frequency of the transfer gear at cruise speed.The solution chosen was to separate the meshing frequencies by slightly changing the gear ratio. The slanting of the gear was also addressed by increasing the length of the under-gear support bearing.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Gear Whine Modulation Root Cause Analysis and Elimination


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2007 Noise and Vibration Conference and Exhibition ; 2007



    Publication date :

    2007-05-15




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Gear Whine Modulation Root Cause Analysis and Elimination

    Durfy, J. L. / La, C. B. / Society of Automotive Engineers | British Library Conference Proceedings | 2007


    Gear whine modulation root cause analysis and elimination

    Durfy,J.L. / La,C.B. / Ricardo Consulting,GB | Automotive engineering | 2007


    Experimental Transfer Path Analysis of Gear Whine

    Kawahara, Ichirou / Sako, Isao / Ando, Kouichi et al. | SAE Technical Papers | 2005


    Experimental Transfer Path Analysis of Gear Whine

    Kanda, Y. / Saka, T. / Fujikawa, M. et al. | British Library Conference Proceedings | 2005


    Experimental transfer path analysis of gear whine

    Kanda,Y. / Saka,T. / Fujikawa,M. et al. | Automotive engineering | 2005