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A new analysis procedure have been developed that evaluate a brake system performance based on analyses of the transient characteristics and frequency characteritics in the brake piping. Using this procedure, analyses were made of the effect of ABS operation on brake pressure changes and of the influence of the orifice on the pressure transmission characteristics. As an example of a frequency analysis, the pressure transmission characteristics were analyzed when pulse pressure occured in the brake piping as a result of variation in the wall thickness of the brake rotors. This paper presents the results of these analyses and shows the validity of the new procedure through a comparison with experimental data.