Thermal Performance of Commercial Vehicle Braking Process during the Vehicle Descending Speed Control on Roads with Long Length Steep Inclination - A Case Study

Article Preview

Abstract:

Study about the performance of the service brakes and the retardation systems of commercial vehicles during the descending speed control on roads with long length steep inclination in Brazil. Mathematical models, based in the equations of the energy balance during the vehicle braking process are used. The thermal performance of the service braking system, of the engine cooling system, and of retarders, are verified for the established maximum safety speeds for a vehicle traveling downhill. The simulations are performed with programs elaborated in the Matlab-Simulink platform and with the vehicles as per the European norm ECE R13 requirements (test type II A) and the Brazilian norm requirement (NBR 10967) for the downhill functional test (test type III). The obtained results show that it is possible to have a forecast of the dissipated power in the engine and the retarder, of the capacity of dissipated heat of the radiator, and other parameters to guarantee the effective speed control of the vehicle, as per the requirements of the norms, even before the road test are performed.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

283-288

Citation:

Online since:

October 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2014 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] A. C. Canale, J. C. Horta Gutiérrez: Estudo do desempenho da frenagem e do controle da velocidade de descida em declive longo e acentuado no trecho da serra do mar da Rodovia dos Imigrantes de veículos comerciais representativos da frota nacional, Livro eletrônico, Acesso em http: /www. eesc. usp. br/smm/autom/material/PesquisaEcovias(versaolivroeletronico). pdf, EESC-USP, v. 1, São Carlos, SP, Brasil (2006).

DOI: 10.11606/d.18.2006.tde-22082006-200355

Google Scholar

[2] A. C. Canale, J. C. Horta Gutiérrez and F. Ortega: Manual do Condutor de Veículos Comerciais – Usuário da Rodovia dos Imigrantes, Editora Rima, ISBN 978-85-7656-115-6, São Carlos, SP, Brasil (2007).

Google Scholar

[3] J. C. Horta Gutiérrez: Estudo do desempenho da frenagem e do controle da velocidade de descida em declive longo e acentuado no trecho da serra do mar da Rodovia dos Imigrantes de veículos comerciais representativos da frota nacional, Trabalho de Pós-Doutorado, Escola de Engenharia de São Carlos (EESC) da Universidade de São Paulo (USP), São Carlos, SP (2005).

DOI: 10.21041/conpat2019/v2pat21

Google Scholar

[4] ABNT: NBR 10967 (MB 3160) – Sistema de freios para veículos rodoviários - ensaio de desempenho, Rio de Janeiro, RJ, Brasil (1990).

Google Scholar

[5] A. C. Canale: Automobilística – Dinâmica e Desempenho, Editora Èrica, São Paulo, SP (1989).

Google Scholar

[6] M. J. Lucas: Faixas adicionais para trechos de rodovias com declives longos considerando os aspectos da frenagem de veículos de carga, Dissertação (Mestrado) – EESC, USP, São Carlos, SP, Brasil (2004).

DOI: 10.11606/d.18.2016.tde-05012016-103531

Google Scholar

[7] CEE, Regulamentos: Norma ECE-R13 e Diretiva 71/320 da EEC.

Google Scholar