SAE J2521 noise tests are conducted to examine the impact of shim and grease on brake squeal generation. The impact of adhesive (bonded) shim, clip-on shim and grease for noise generation are examined. Low frequency squeal is eliminated by the application of grease on both adhesive (bonded) shims and clip-on shims. The role of shim and grease for reducing brake squeal is discussed. Adhesive (bonded) shims were found to be effective for high frequency squeal (pad bending mode) by increasing damping. Grease is effective for low frequency squeal (pad rigid mode). The mechanism to eliminate low frequency squeal by the application of grease is investigated. Friction between the shim and caliper piston/finger is reduced. Pads contact directly to the anchor bracket. As a result the contact stiffness is increased. The mechanism is confirmed by experiments.


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    Title :

    The Effect of Grease on Brake Squeal


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE Brake Colloquium & Exhibition - 32nd Annual ; 2014



    Publication date :

    2014-09-28




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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