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Master's Dissertation
DOI
10.11606/D.18.2017.tde-03032017-153945
Document
Author
Full name
Alexandre Augusto Brossi
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2002
Supervisor
Committee
Canale, Antonio Carlos (President)
Viegas Neto, Darwin Amaral
Widmer, João Alexandre
Title in Portuguese
Estudo do desempenho de frenagem de um ônibus biarticulado
Keywords in Portuguese
Biarticulado
Desempenho
Frenagem
Ônibus
Abstract in Portuguese
Tem como objetivo estudar e otimizar o desempenho de frenagem do ônibus biarticulado que trafega nas grandes cidades brasileiras. Apresenta-se um estudo do sistema de freios do veículo e propõe-se um modelo matemático para o cálculo de todas as forças que agem no sistema de freio e nas rodas. O programa computacional calcula as forças de frenagem que atuam nos eixos, as forças verticais nos eixos, as forças de inércia, o coeficiente de adesão utilizado por eixo, a desaceleração do veículo, o espaço de parada e a eficiência do sistema de freio. Os resultados são confrontados com a norma internacional ECE-R13 a fim de verificar se o veículo obedece aos requisitos estabelecidos pela mesma.
Title in English
Biarticulated bus brake performance study
Keywords in English
Biarticulated
Brake
Bus
Performance
Abstract in English
This work is concerned with the study optimization the breaking system of a biaticulated bus, which circulates in many Brazilian cities. The vehicle brake system is studied and a mathematical model is proposed in order to calculate all forces in the brake systems and in the wheels. Based on a computational program the brake force in the axles, the vertical forces in the axles, the inertia forces, the adhesion coefficient requested by each axles, the vehicle deceleration, the brake distance and the brake system efficiency are calculated. The results are compared with the international standard ECE-R13 to verify whether the bus satisfies the regulation.
 
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Publishing Date
2017-03-03
 
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