The mechanical properties of a gray cast iron disc brake rotor are directly influenced by the amount and morphology of the graphite present throughout the rotor. Two of these properties, the modulus of elasticity and the damping capacity, can have a significant effect on the propensity for the disc brake rotor to produce noise. The noise propensity of a disc brake is in a large part determined by the relationship between the rotor resonances and the resonances of the other brake components such as the pads. In this paper, we are concerned only with the effect that modulus of elasticity has on disc brake noise through its influence on rotor resonances.The amount and morphology of the graphite in gray cast iron is determined by the carbon content and silicon content of the iron. The carbon and silicon content are measured by one parameter called the carbon equivalent. For gray cast iron the relationship between carbon equivalent and modulus of elasticity is almost linear for the grades used in disc brake rotors. This relationship allows the modulus of elasticity and, in turn, the rotor resonances and resulting brake noise to be influenced by the carbon equivalent of the rotor.A case study showing the effectiveness of controlling rotor resonances through carbon equivalent to reduce brake noise is presented. The subsequent effect of foundry process control on brake noise propensity is also evaluated.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Disc Brake Noise Reduction Through Metallurgical Control of Rotor Resonances


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Annual Brake Colloquium And Engineering Display ; 1998



    Publication date :

    1998-09-20




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Disc brake noise reduction through metallurgical control of rotor resonances

    Malosh,J.B. / Bosch Braking Systems,US | Automotive engineering | 1998


    Disc Brake Noise Reduction Through Metallurgical Control of Rotor Resonances

    Malosh, J. B. / SAE | British Library Conference Proceedings | 1998


    Disc brake rotor

    KIYOKAWA KANAKO / SHAHANA SATOSHI / NAKAKURA MASAHIRO | European Patent Office | 2024

    Free access

    Bicycle disc brake rotor assembly and bicycle disc brake rotor

    NAKAKURA MASAHIRO | European Patent Office | 2016

    Free access

    DISC BRAKE ROTOR

    KUWAYAMA KAZUYA / HOSOMI YUSUKE / NOMA NATSUKI | European Patent Office | 2019

    Free access