Comparison of the subjective x objective braking comfort analysis of a passenger car. / Comparação da análise de conforto de frenagem subjetiva x objetiva de um veículo de passeio.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Considering today’s competitive automotive market, the customer satisfaction has become a competitive advantage to be considered, due to the customer expectation increasing regarding the quality perception. In this aspect, one of biggest existing difficulties in the brake system design is to transform subjective information and/or opinions into objective information and/or data, such as design parameters. The present study investigates the objective analysis of the brake pedal feeling for passenger cars, establishing index that can support and/or complement the subjective analysis, usually used by our company, for a study case involving the friction material change of passenger car’s caliper brake pad. The computational simulation program has been used for the objective analysis, to analyze the brake system performance based on established index. The obtained data through this simulation was compared with the subjective evaluation results as much as with experimental measurements results of the analyzed vehicle, analyzing the correlation of results. To the end of this study, based on the comparison between subjective evaluation and objective evaluation, it observed a brake comfort improvement for drivers, instead of this characteristic would be imperceptive in subjective evaluation. This tool will be very important in the optimum comfort curve establishment for the new developments of electro-hydraulic brake systems, called "brake-by-wire" (BBW).

ASSUNTO(S)

passenger cars conforto veicular frenagem vehicle confort braking brakes freios automóveis

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