Knock noise induced by automotive shock absorbers has serious influence on driving comfort and vehicle quality. Some research focusing on knock noise had been introduced in the past. However there is the unidentified phenomenon that has been unnoticed. This paper describes the new theory to clarify one of the unidentified phenomenon and proposes the equation for stability assessment which is useful on designing stage of development.First of all, the characteristics of the unidentified rod vibration of shock absorbers are investigated experimentally. Second, the new theory is established on the basis of the non-linear physical model with friction forces between piston and cylinder. This theory shows that the unstable vibration, so called the Self Excited Vibration, can be induced by not only friction property but also structure of rod and piston. Third, the equation for stability assessment, which is useful on designing stage of development, is proposed on the basis of new theory. Finally, the appropriate structure of shock absorbers is prototypically made and verification test is demonstrated to confirm the equation for stability assessment.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Theoretical Analysis and Proposition to Reduce Self-Excited Vibration of Automotive Shock Absorber


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2003 Noise & Vibration Conference and Exhibition ; 2003



    Publication date :

    2003-05-05




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Theoretical analysis and proposition to reduce self-excited vibration of automotive shock absorber

    Yamauchi,H. / Sugahara,T. / Mishima,M. et al. | Automotive engineering | 2003


    Theoretical Analysis and Proposition to Reduce Self-Excited Vibration of Automotive Shock Absorber

    Yamauchi, H. / Sugahara, T. / Mishima, M. et al. | British Library Conference Proceedings | 2003


    AUTOMOTIVE HYDRAULIC SHOCK ABSORBER

    COHEN EVYATAR | European Patent Office | 2022

    Free access

    AUTOMOTIVE HYDRAULIC SHOCK ABSORBER

    COHEN EVYATAR | European Patent Office | 2022

    Free access

    Active vibration absorber for automotive suspension: a theoretical study

    Reina,G. / Rose,G.D. / Univ.degli Studi del Salento,IT | Automotive engineering | 2016