An effort was made to evaluate accurately truck air brake performance balance at low application pressures by means of comparing drum temperatures. This procedure produced excellent results, and is a fast, practical method for evaluating brake performance of combination vehicles. The drum, hub, and wheel assemblies used in this evaluation were all the same type and weight. The s-cam used was a 16-1/2 X 7 in. and the wedge was 15 X 7 in. Mixed combinations of these types were tested.It was found that s-cam brakes are more effective when used on drive axles than when used on trailing axles. A tractor protection valve with a built-in pressure increase of 33% to the trailer brakes was installed to compensate for the more effective drive axle brakes and this provided the desired braking balance.


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    Title :

    Vehicle Brake Performance Evaluation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Mid-Year Meeting ; 1970



    Publication date :

    1970-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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