Accurate values of tire-roadway friction are an essential requirement for an accurate collision reconstruction. This paper presents updated tire friction data for three grades (economy, touring, and performance) of commercially-available tires under both wet and dry road conditions. Differences between tires and road conditions were tested using 540 locked wheel braking tests with a single passenger vehicle on a single road surface over six consecutive days. The vehicle was braked from about 60 km/h to a stop using a mechanical brake actuator to minimize variations in brake pedal application. These results showed differences between the friction measured with economy, touring and performance tires under wet and dry road conditions. Dry road friction values were higher than those reported previously in the literature using older model tires and these dry road friction values were normally distributed. These data also showed that vehicle speed calculated using skid distance, even with improved estimates of skidding friction, underestimated pre-braking speed. To account for the pre-skid braking, adjustments to both the pre-skidding vehicle speed and onset of the driver's perception/response times appear to be warranted.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Tire Friction During Locked Wheel Braking


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2000 World Congress ; 2000



    Publication date :

    2000-03-06




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Tire Friction During Locked Wheel Braking

    Goudie, D. W. / Bowler, J. J. / Brown, C. A. et al. | British Library Conference Proceedings | 2000


    Tire friction during locked wheel braking

    Goudie,D.W. / Bowler,J.J. / Brown,C.A. et al. | Automotive engineering | 2000


    Locked wheel annunciation during emergency braking

    ZELL BRIAN KEITH | European Patent Office | 2019

    Free access

    LOCKED WHEEL ANNUNCIATION DURING EMERGENCY BRAKING

    ZELL BRIAN KEITH | European Patent Office | 2019

    Free access

    LOCKED WHEEL ANNUNCIATION DURING EMERGENCY BRAKING

    ZELL BRIAN KEITH | European Patent Office | 2019

    Free access